The question of how to paint slate is not unreasonably asked. The fact is that wave roofing material has recently become less popular, as it tends to become clogged with vegetation and acquire an unpleasant gray-green tint.
But I would like to forget about these coating disadvantages, because this material is inexpensive, durable and weather-resistant.
There is a way to prevent the formation of a gray coating on slate, and it involves using paint.
Choosing a coloring composition for slate
Paint selected according to the requirements can both decorate the roof and protect it from exposure to bad weather and other negative factors.
When looking for a coloring composition for wave material, it is better to choose acrylic and enamel varieties.
Only these products will be able to properly paint slate and mask all microscopic cracks.
The paint forms a film on the roofing that serves as a barrier against precipitation and temperature changes.
Acrylic and enamel compositions consist of binding components, which are essential when applying paint to flat slate.
But if you need to use a paint emulsion to cover the roof of a house located in an area where it constantly rains, winds blow and the temperature changes, then it is best to use quick-drying enamel.
And yet, when thinking about how to paint the wave material, it is recommended to contact specialists who will give competent advice, taking into account the actual condition of the roof.
But how slate will look and perform its task is influenced not only by the chosen paint, but also by the technology of applying it to the material.
This work can be divided into 3 steps: treating the surface with a primer, coating with a coloring composition and applying a finishing layer of a roofing strengthening agent.
It is advisable to prime the slate on the roof with a composition that penetrates most deeply into the material, as it will allow the surface of the roofing to be well strengthened.
In addition, a roof treated with a special product is much easier to paint. The paint applies smoothly to the primer, and its consumption is insignificant.
Typically, a sheet of material requires a strand of 150 g of priming composition, which is advised not to be applied, but to be sprayed onto the surface at an air temperature not lower than +5 0 and not higher than 30 0 heat.
The primer dries on the slate in about half a day. TO next action– painting the roofing material should be started after the primer composition has completely dried.
Usually this is done the next day. To use it, you must wear gloves and safety glasses.
Priming the roof covering is a very important step because it prepares the material for further processing and ensures that the paint is well absorbed.
If you do not use a special liquid before painting the slate, it will have to be repainted.
Preparing wave material for painting
Before applying paint to slate, you need to find several materials and tools:
- brush for cleaning metal;
- drill;
- grinding machine;
- antiseptic used during construction work;
- brush;
- spray;
- protective equipment (gloves, goggles and respirator);
- paint (acrylic);
- priming agent;
- jet washer high pressure.
To prepare slate for painting, it needs to be cleaned, since this material, especially one that has been used for many years, accumulates a lot of debris.
Cleaning the wave coating can be done using different methods. Typically, slate roofing is tidied up using a regular metal brush, power tools, or a special steam unit.
A lot of effort has to be applied when cleaning the wave material with a brush. In this case, you need not only to work hard, but also to spend a lot of time.
True, such sacrifices are often not justified - slate is poorly cleaned with a brush. However, you can resort to this method of preparing the roof for painting. The main thing is that this task is performed on perfectly dry material.
Cleaning the roof with a tool powered by electricity is much preferable. It assumes that dirt is removed from slate using a special attachment on a drill or grinder.
The advantage of this slate cleaning option is quality. Working with an electric tool does not affect the speed of preparing the wave material for painting; you will have to spend the same amount of time on the roof as when using a regular brush.
The best method for cleaning slate is to use a steam unit, the operation of which is not interfered with by precipitation or air temperature.
The method implies that the roofing is tidied up using water under high pressure (250 atmospheres).
To make the roof clean in this way, you need to equip yourself with a specialized sink that creates a stream that escapes under significant pressure.
The product can be applied either with a brush or with a spray. After covering the slate with an antiseptic, hydrophobization should begin, which protects the corrugated material from premature destruction and increases its service life.
Applying paint to the roof
If you paint the slate, it will look much more aesthetically pleasing. Of course, it is best to decorate the wave material before laying it on the roof.
But most often people think about painting slate after several years of using the roofing because they find that it has begun to look terrible. Be that as it may, painting a roof is a responsible undertaking.
Many people who want to update their slate have a question: is it even possible to apply paint to the wave material?
To this we can say one thing: it is necessary to paint the slate, because the special composition plays the role of a protective layer - it protects the material from damage. By the way, dyed wave material does not deteriorate when exposed to extreme cold.
To paint a roof covering with waves, you need to arm yourself with several paint brushes. Tools different sizes will allow you to paint all areas of the roof, including corners and ends.
When applying the first layer of paint, it is forbidden to leave gaps. Once the paint has dried, the slate can be treated a second time. An additional layer of paint will make the roof covering perfect and durable.
The first application of the coloring composition is the most important, since during this operation more than half of the paint and varnish is spent.
Each sheet of slate is painted separately, not forgetting about the processing of edges and corners. Areas that are difficult to reach with a brush should be given great attention.
Even the first layer of paint will radically change the appearance of a roof covered with corrugated material, but you should not refuse additional treatment of slate.
The final painting of the roof covering begins no earlier than the first layer of paint has dried.
By applying the emulsion a second time, the owner of a house whose roof is laid with slate will get what he wants: the wave material will become uniform, and the stains on its surface will disappear.
Typically, when creating an additional layer, no more than 1/3 of the total volume of the coloring composition is consumed.
The presented technology can be safely used to update the surface of both wavy and flat slate.
Having completed all of the above steps, you will be able to give the roof an aesthetic appeal, and this is a big plus for any type of structure.
Old slate coated with paint can last for many years without complaints, as it will be protected from the negative effects of weather.
So, painting slate, first of all, is scary not because of the duration, but because of the labor-intensive process, but the result is worth all the effort.
Cleaned with a brush, treated with a primer and painted with a special compound, the roofing material becomes indistinguishable from new and will serve for many years. Paint is like a barrier to rain, sun rays and low temperatures.
Slate painting. The article describes a method for preparing old slate for painting.
Many owners of private houses, especially those that were built in Soviet times, you can see slate on the roofs. Indeed, slate is a very durable and high-quality material that lasts 50 years or more if it is laid well. The only thing that spoils it appearance This is perennial dirt and mold. Moreover, the slate itself is in quite good condition and can still serve. Don't dismantle it because of dirt. To solve the problem, there is a good solution - repairing and painting the slate. And we will tell you how to do this in the article.
Very often, instead of replacing old roofing material, people prefer to renew it. It would seem that this is certainly more profitable from a material point of view and less hassle. But, however, often repainted old slate begins to peel off after winter. Why is this happening?
Painting slate, what is needed for this?
Simply covering the slate with paint is not enough. To ensure that the applied paint does not begin to peel off the slate, it must be prepared. The process of preparing slate for painting will require no less effort than changing roofing material, but cheaper. It is quite difficult to properly prepare slate for painting without removing it from the roof.
High-quality paint for slate is also of great importance, reviews of which can be found from neighbors who have done similar repairs, or even easier, read on the Internet. Let's briefly say that the paint must be frost-resistant, not crack, and it is advisable to be environmentally friendly. Read the instructions on the can and don’t buy too cheap paint, it will peel off in three months.
- The first stage of preparation is to clean the slate from old plaque that has formed on the slate. You can clean old slate mechanically using sandpaper.
- After the slate has been cleaned, it must be treated with an antifungal primer. After the primer has dried, the slate is covered with liquid cement.
- Dilute dry cement in water. The resulting solution should be no thicker than, for example, drinking yogurt. Cover the slate with the mixture using a brush. Do not use a roller for this job. After the solution has completely dried, prime the slate again.
- For final stage preparation use façade primer concrete contact. Then, after the primer has dried, the slate can be painted. Only old slate prepared in this way and painted will not peel off for at least seven years.
Successful repairs and a beautiful roof!
Asbestos slate is gradually losing its position in the market building materials. The reason is its nondescript appearance. In this article we will consider the topic - how to paint a slate roof, what paint to use to make this roofing material presentable. Topics will be discussed regarding the benefits of painted slate roofing, as well as the types of paints used to paint slate roofing structures today.
Why should you paint slate roofs?
The first reason is indicated - plainness. It is difficult for slate to keep up with ondulin, corrugated sheets, metal tiles and other roofing coverings in terms of design. There is only one way out - to cover it with paint. This will not affect the cost of the roofing structure, because slate is the cheapest material. Having painted it, we cannot talk about high costs for paint per 1 m2.
In addition, the paint and varnish materials that are used to paint slate roofs today are not in short supply, their variety is quite wide, so there will be no problems with the choice. The dyeing process itself is simple. One worker is enough for a team of craftsmen to paint the roof of a large house.
The second reason is protective. Slate is a porous material. Over time, microcracks form on its surface. What this entails is probably not worth explaining. But we need to pay attention to this point. In winter, water penetrates into cracks where it freezes. Ice simply breaks the asbestos fibers, thus reducing the strength of the material itself.
The same applies to the process when mosses and lichens grow on slate. With their roots, they penetrate deeply into the body of the slate, widening and deepening the cracks.
Therefore, painting is a protective layer that will not only become a barrier to water, but also an insurmountable barrier for plants. The film formed on slate from dried paint is very durable. In any case, she will be able to cope with the loads described above for several years. This means that a roof covered with slate will last longer.
The third reason is the harmfulness of asbestos. Several decades ago, propaganda against slate began in the West. It also moved to Russia, and was supported by manufacturers of more expensive building materials. Although it has long been proven that this is just propaganda to give other roofing materials the opportunity to be present and sold on the market. But if this aspect haunts you, then with the help of paint you will solve this problem.
So, let’s summarize why painted slate is better than unpainted slate:
Increase decorativeness roofing structure.
Using a certain type of paint, you can give slate matte or gloss.
Make a surface smooth without pores or cracks.
Don't give it a chance to grow mosses and lichens.
Install protection from the appearance of asbestos dust.
Increase lifetime. Painted material will last 1.5 times longer.
Types of paints for slate
A roof, even one covered with paint, requires special treatment. It is subject to all known natural stresses, so the choice of paint must be approached with special care. That is, it must withstand sunlight, changes in humidity and temperature, and mechanical stress. At the same time, it should adhere well to asbestos-cement slate.
That is, you cannot paint slate with whatever paint comes to hand first. Here is a list of suitable colors:
acrylic;
silicone;
alkyd;
enamels called "Liquid Plastic".
Let's look at each variety separately and determine their technical characteristics, as well as their pros and cons.
Acrylic paints
This is the most extensive line of paint and varnish products with intense color and varying degrees of gloss (from highly glossy to highly matte). This category of coatings is divided into two groups:
water based, they are also water-dispersed;
based organic solvents.
Group No. 1
Composition: latexes, also known as acrylic copolymers, pure water, pigments and various additives that improve the quality of paint (antifreeze, biocides, etc.). It should be noted that in percentage water in paint is no more than 15%. It functions as a diluent and solvent.
Here are the advantages of acrylic water dispersion material:
This environmentally friendly material, which under the influence of natural loads does not emit harmful substances into the atmosphere;
high adhesion to any building materials, including slate;
high hiding power, within 200-300 ml/m2;
ease of application;
sustainability to precipitation;
This non-toxic material;
high fire resistance, because the base is water;
not necessary add chemical solvents;
dries within 1-2 hours;
paint layer increases frost resistance slate;
increases waterproofing properties roofing material;
service life – 5 years.
In the group of water-dispersed acrylic paints there is a subgroup called “rubber”. These are all the same components, only the structure of the material is thick mastic. It is applied to the roof in a thin layer, which, after drying, forms an elastic flexible film, very similar to rubber. Hence, in principle, the name.
On our website you can get acquainted with the most . In the filters you can set the desired direction, the presence of gas, water, electricity and other communications.
The film is not only elastic, but also very durable. At the same time, it covers cracks up to 1 mm wide well, preventing them from expanding later. Mastic has high adhesion to porous surfaces. And it is one hundred percent waterproofing coating. It is represented on the market in a fairly wide range. It is available in cans and buckets labeled “Rubber Paint.”
Group No. 2
Acrylic paint for this type of slate roof is not diluted with water. For this purpose, solvents of organic origin are used, most often white spirit is used. There are also matte and glossy paints, which differ from each other in the amount of acrylic resin added to the composition. The higher its percentage, the higher the gloss of the material.
How does this variety differ from water-dispersed:
colorful film applied to slate stronger;
higher water-repellent characteristics;
increased elasticity coatings;
for a long time holds original color.
The disadvantages include a pungent odor that gradually disappears, a slightly higher consumption - 250-350 ml/m2, drying time is longer - within 10-24 hours. Here you can add not the widest range presented on the modern market.
Silicone paints
Silicone paints consist of pigments and organosilicon binders, which give the paint and varnish material special strength and elasticity. Therefore, silicone-based paints are rightfully considered reliable and durable coatings, and not only for slate. Only they can close cracks up to 2 mm wide.
So, what are the advantages of this type of paintwork:
increased strength applied layer;
maximum possible elasticity;
added to the paint supplements, which prevent the formation of colonies of harmful microorganisms on roofs;
high waterproofing quality;
high dirt-resistant properties;
silicone paints can be applied to the slate of the latter;
high fire safety;
This non-toxic material;
life time within 10-15 years.
The only negative that should be noted is the high price compared to other types.
On our website you can find contacts of construction companies that offer construction services for small architectural forms. You can communicate directly with representatives by visiting the “Low-Rise Country” exhibition of houses.
Alkyd paints
Composition: alkyd resin, pigments and organic solvent. It should be immediately noted that this type of paint and varnish product belongs to the category of quick-drying ones. After 30-90 minutes the paint dries completely. The applied layer is quite elastic. No cracks form on it throughout its entire service life. And the term is not the longest - only 5 years. Although this is a normal indicator for a roof.
To the advantages of alkyd paints we add high moisture resistance, good adhesion, and ease of application. Using them, there is no need to coat the slate roof with primers. And another important advantage that many craftsmen have highlighted is the ability to tint white alkyd paint.
Video description
The video shows the process of painting slate:
Polymer paints
“Liquid plastic” got its name for a reason. It consists of suspensions of various polymers. This can be PVC (polyvinyl chloride), polystyrene or polyurethane. Each of them is the main paint and varnish product. This also includes pigments, additives that improve the quality of paint, and solvent. It turns out that after applying the paint layer, the solvent evaporates from it, and the polymer dries and hardens, forming a thin layer of plastic on the slate roof. In this case, the surface may be either glossy or matte.
Advantages of this material:
absolute moisture resistance;
dries out within half an hour;
one hundred percent environmental friendliness;
material inert to chemistry;
plastic - material incombustible;
paint can be applied without preliminary priming;
doesn't lose its design qualities under the influence of sunlight, precipitation and wind;
highest frost resistance, you can apply paint to slate even at a temperature of -10C;
life time– 10-15 years.
So, we examined those types of paint and varnish products that answer the question posed by the topic of the article - how to paint slate on the roof. Now let's move on to the section on how to properly paint a slate roof.
Slate painting technology
It should be immediately noted that even the most expensive and high-quality paint chosen for the design of slate laid on the roof is not a guarantee that the applied coating will withstand its allotted service life. The most important point is a competently carried out painting process. It is divided into several stages, the sequence of which must be strictly observed.
Stage No. 1
First of all, the slate laid on the roof must be prepared. That is, the slate roof is being cleaned. This is done in three ways:
Mechanical. To do this, use scrapers, brooms, brooms, brushes and other identical hand tools and devices. With their help, dust, dirt, debris, and small vegetation are removed from the slate surface.
Hydraulic. To do this, use a stream of water under high pressure. You will need a long hose, a nozzle, a pump and a container of water (you can connect the pump to the water supply).
Combined. They combine the two previous methods, which is more effective, especially when old slate coverings are prepared for painting.
Stage No. 2
At this stage, the roofing material is primed. Usually it is selected according to technical specifications paints. It is better if the primer and paint are from the same manufacturer. As mentioned above, some slate paints can be installed without prior priming.
If a primer is necessary, it is applied to the slate with brushes, rollers or a spray gun. The latter option is simpler and more convenient to apply, and also more economical. It is better to apply the primer in two layers, ensuring that the first one dries well before applying the second.
Stage No. 3
This process is no different from priming. It is carried out with the same tools. The material is applied in two layers, the first must be dried before applying the second. The first layer is considered the base layer. With its help, all irregularities and defects in the roofing material are covered. Therefore, it is very important to paint the joints, corners, slate ends, as well as ridge and gable elements.
The second layer is already the finishing (painting) layer. It is with its help that the color design of the roofing structure is created. It is this layer that creates a bright, uniform color; there should be no streaks or smudges left on it.
Video description
The video shows how easy it is to paint slate on a roof with a brush:
Conclusion on the topic
So, we looked at the topic - how to paint old slate on a roof, and how to do it correctly. As you can see, there are many paints that can be used to paint slate roofing structures. Each has its own pros and cons, but they all have one quality - they tolerate natural stress well. This means that slate roofs painted with these paints will delight you for many years.
In the domestic construction market, slate has remained one of the most popular materials for many years. Today it is used both unpainted (for country houses, for outbuildings and non-residential premises) and in painted form. The latter option can give the house additional aesthetics. However, if you decide to transform the roof of your house, you should choose the right materials. Let's try to figure out how to paint slate, which paint is preferable and why?
Let's start with the fact that most of our compatriots are firmly convinced that only wavy sheets are “slate”, but in fact, flat sheets made of asbestos-cement chips also fall under this definition.
What is the best paint for slate?
Modern choice materials are enormous, and this makes it possible to make the roof of a house truly individual. When choosing what to paint slate with, evaluate all the advantages and disadvantages of imported and domestic options and only then make a purchase.
Acrylic paint for slate
The list of undeniable advantages of acrylic or water-dispersed compositions includes:
§ Ability to fill small cracks and provide reliable protection against moisture penetration.
§ Hydrophobicity. Water easily rolls off the painted surface, which makes it possible to work with the composition on flatter roofs.
§ Reducing the load on the rafters. Occurs due to improved conditions for snow removal from slate.
§ You can work with acrylic paint at air temperatures from +5°C to +35°C. The drying process takes 1-2 hours; complete polymerization of the composition takes a day.
If you are looking for how to paint flat slate? Acrylic paint is best suited for these purposes. It provides the roof with maximum resistance to weathering and temperature changes.
Fast-drying enamel for slate
This option contains a binder that promotes the formation of a smooth film on the roof surface. A roof painted with such enamel is not only durable, but also has high water-repellent properties and is reliably protected from the destructive effects of ultraviolet rays.
Liquid plastic for slate
This synthetic composition is made on a polystyrene, bitumen or vinyl chloride base. The high popularity of this paint for slate is explained by the ease of its application, as well as its high elasticity, which eliminates the risk of delamination of the coating. Rubber paint contains pigments that prevent the color from losing its brightness for a long time. The only drawback is toxicity. The composition should be applied in special means respiratory and hand protection.
§ Dachbeschichtung (Germany). It is known for its durability, strength, and high adhesive properties. But at the same time it is more expensive than other imported analogues and can only be applied to natural tiles and slate.
§ Polifarb/Akrofarb (Poland). This composition is created on the basis of dispersion paints, which ensures high drying speed, as well as color saturation and brightness.
§ Kilpi (Finland). This paint is perfect for slate, corrugated sheets, and metal tiles.
§ Eter Akva (Finland-Sweden). This material is resistant to alkaline aggressive environments, is water-soluble, and contains acrylate. It is used for coloring slate and concrete.
How to repair and paint slate
Old slate can last for quite a long time if you take the appropriate measures. Of course, this requires a lot of work, but it is still much cheaper, easier and faster than replacing the roofing material completely.
The slate can be restored. To do this, it needs to be washed, repaired and painted.
The first stage is not as simple as it seems. Rags and sponges will be useless here. And even with hard metal brushes it will be impossible to clean old slate, which has become covered with a layer of moss over many years. Here it is better to use something more serious. In particular, we can recommend a drill attachment in the form of a round stiff brush. With this attachment it is quite possible to clean the slate until it is suitable for use. further work condition.
But a high-pressure washer will be even more effective. This tool is used in construction. It can also often be seen among car owners and in auto repair shops. Of course, it is better to use a construction sink, as it has more power.
You cannot skip the stage of cleaning old slate. The fact is that the materials that will be further used for its repair and subsequent protection should not be applied to the layer of debris. In this case, they simply will not be able to properly adhere to the surface and will begin to peel off after a few days.
Old slate often has nasty cracks. It used to be difficult to deal with them. But today new materials have appeared on sale that simplify the task many times over. These materials include bituminous two-component mastics.
If the task is not emergency slate repair to eliminate a leak, but you want to truly improve the quality of the old coating, renew it and extend its service life, then you should not buy and use ready-made mastics. It is better to use two-component ones, which are mixed in a suitable container before use and only then applied to the roof.
There are different types of mastics, and in order to perform slate repair work with their help efficiently, you need to read the instructions that come with them and, most importantly, follow all the recommendations that are set out in it.
After the slate is free of cracks, it is primed. Choosing primers for slate is not easy, since slate is made from complex composition, which may be incompatible with the primer. To play it safe, you can buy an acrylate primer, which is better suited for slate and other similar materials than others.
You can also prime the slate with paint. To do this, you just need to dilute the paint clean drinking water in a ratio of one to ten.
As for painting slate, rubber paint is recommended. It is plastic, easily adapts to any conditions, durable and strong. This paint will provide reliable protection for the roof and will significantly extend the service life of the slate.
Domestic slate paints:
§ Butanite (Russia). The composition contains polymer substances and mineral-silica additives. Butanite provides the roof with reliable protection from atmospheric influences and increases the frost resistance of the surface.
§ Polifan (Russia). The paint is suitable for working on slate, concrete, brick. To her undeniable advantages include durability, color fastness, wear resistance.
§ Unisal (Belgorod). The composition contains acrylic elements and high quality coloring pigments. This paint provides a coating that is resistant to UV exposure and the damaging effects of moisture.
If processing is already installed roof, will require preparatory activities. To do this, you should prepare a brush with metal hairs, an angle grinder or a drill with a special brush attachment, or a high-pressure car wash. The latter option will make the process less labor-intensive and highly efficient.
Using the above tools, we clean the roof from plaque, moss, etc. Next, we treat the surface with an antiseptic, which will prevent the proliferation of fungi and the appearance of plaque. The next stage is primer.
By carefully priming the slate sheets, you can be sure of maximum adhesion of the paint to the surface of the roofing material. In addition, the primer, by filling the pores, will significantly save the paint itself, and the roof surface will become more even.
It is best to paint the surface in 2 layers. The composition can be applied using a roller or brush or spray. It is not recommended to paint slate in rainy weather or very hot days.
Before painting directly, the slate must be checked for hidden serious damage by careful inspection. If some sheets are cracked, they need to be replaced. Simultaneously with checking the condition of the surface of the slate sheets, the reliability of their fastening and, if necessary, additional strengthening are checked. Then the most labor-intensive procedure is performed - cleaning and sanding the entire surface, which completely removes dirt and dark deposits. This work is performed using an electric drill with a sanding attachment. Additionally, it would be a good idea to wash the slate with a powerful stream of water from an electric washer.
After cleaning, you must immediately coat the surface with a special antifungal primer, after which a liquid primer is applied to the roof. cement mortar(with the consistency of kefir). The solution must be applied with a brush (a roller is not suitable for this operation). After waiting for the solution to harden, the slate surface is primed again. The pores and microcracks are sealed and the process of applying paint can begin.
Choosing paint for slate
The selection of paint is carried out taking into account the result you want to achieve - a bright appearance with slightly worse durability, or vice versa, excellent performance with calm and discreet tones. In the first case, acrylic enamel is used, in the second, rubber paint or, as it is also called, liquid plastic. Both options have advantages and disadvantages.
Acrylic paint for slate
Acrylic enamel has water base and fills microcracks well, protecting slate from destruction. It also has water-repellent properties, which is important, since rain, unfortunately, is not a rare occurrence in our latitudes and its harmful effect on the roof surface is most sensitive.
When choosing acrylic paint for slate, you must carefully read the instructions, as it indicates the conditions for its use and lists the surfaces where it should be applied.
Rubber paint for slate
Many experts recommend rubber paint for slate as a special composition that creates an elastic protective film on the surface, which prevents peeling of the paint. It is also good because it adheres perfectly to slate and is convenient to apply.
Rubber paint for slate contains special pigments that do not allow color shades burn out in the sun, so sad gray there will be no roof. A serious disadvantage of rubber paint is its toxicity, so increased attention should be paid to protecting the respiratory system and exposed skin when painting.
Slate paint Condor
Weather-resistant acrylic paints for slate Condor (KONDOR), produced in Belarus under a German license and having excellent characteristics, as well as a good price-quality ratio, have proven themselves well. Condor paints are sold in all construction hypermarkets and many stores for summer residents.
Slate painting
So, the roof is prepared, the paint has been selected, you can start painting the slate. And then it arises important question: Is it possible to paint slate when it is wet and wet weather, won't this harm the quality of work? It will hurt! It is better to paint in dry and warm weather.
Reviews from those who painted slate themselves say that work done on a warm spring day gives best results and the paint lasts longer after application in the spring than if it is done in the hot summer. For painting, use a roller, brush or spray; the paint is applied in two layers, with the first completely dry.
If all operations are performed correctly, the old-new slate roof will last for a very long time. for a long time, and the paint will retain its color and will not crumble even after intense rainfall and temperature changes
Slate preparation
The process of preparing slate involves cleaning it of any debris. It should be noted that this procedure often requires even new material, since there may be adhered particles of asbestos cement on it, which are invisible at first glance. To remove them, you can use a regular small spatula.
Advice! Before painting a slate fence, you should break through the grass that usually grows along it and interferes with painting.
If the slate has already been used, then it needs to be cleaned more thoroughly. To do this, you need to use a stiff metal brush, treating every centimeter of the surface.
When cleaning slate, it should be wiped with a damp cloth to remove dust and small debris.
Padding
The next step is priming. For these purposes, it is best to use an acrylic universal primer.
Instructions for applying it look like this:
1. first of all, the canister with soil must be thoroughly shaken;
2. then the liquid must be poured into a container into which it will be convenient to dip the brush;
3. Next you need to moisten paint brush in the ground, squeeze lightly against the walls of the container and then apply the liquid to the surface of the slate. The soil should be laid down in a uniform thin layer, so it is necessary to avoid drips and large accumulations of liquid in certain areas.
If you plan to paint flat slate, you can use a paint roller to apply the primer;
4. After the surface has dried, the procedure must be repeated again.
Advice! If necessary to cover with primer large area, you can use a spray bottle or spray bottle.
This completes the priming process.
Selection and preparation of paint
Before you paint flat slate or corrugated material, you need to decide on the paint. Best choice in this case, they are polymer water-dispersed compositions. Moreover, it is necessary to use paints that are intended for covering the roof or facade.
It should be noted that polymer compositions come in three types:
· acrylic;
· silicone;
· latex.
The most durable are silicone and latex paints however, the price for them is very high - ~ 4000-5000 per bucket with a capacity of 10 liters. Therefore, you can use acrylic paint, which is much cheaper, but is also quite durable.
As a rule, water-based paints are sold white and require tinting. This process consists in adding the required amount of color desired color, which allows you to achieve any shade.
As a rule, in stores that sell paint coatings, there are special tinting machines. They allow you to paint the entire batch of purchased paint in the same color of your choice.
Note! When painting a roof, you should purchase paint coatings not only for slate, but also for other surfaces. For example, anti-corrosion conductive paint Zinga is suitable for fencing and flashings. To paint chimneys, it is better to use fire-retardant metal paints Polistil.
If it is not possible to perform tinting when purchasing paint, you need to independently decide on the proportions of the color, first painting a small amount of the composition. After this, the same amount of color must be added to all containers with paint and mixed thoroughly.
Painting
The final stage is painting, which is performed in the following sequence:
1. Before use, the paint must be mixed;
2. then it should be poured into a container into which it will be convenient to dip a paint brush or roller (if painting flat slate);
3. After this, the painting tool must be moistened with paint, squeezed lightly and applied to the surface. This stage is the most critical, since you need to ensure that the coating is applied in an even, thin layer, and there are no unpainted areas left;
4. When the paint dries, the procedure must be repeated again.
This completes the slate painting process. It should be noted that this operation can also be performed using a spray bottle.
Conclusion
The process of painting slate is quite simple and quick. However, it must be taken into account that the quality of the work done depends on the preparation of the surface. Therefore it is necessary to pay Special attention cleaning slate from dirt and priming.
Paint and primer for slate: Shikril Among the special paint and varnish materials, produced to protect slate, there is also acrylic paint Shikril, which is based on organic solvents. This paint is used for finishing not only asbestos-cement slate, but also concrete plinths, cement-sand tiles and other external surfaces that require alkali-resistant painting.
Using Shikril paint, damaged areas of previously painted surfaces that need urgent repairs are renewed. The basic range of colors includes: white; gray RAL 7040; burgundy RAL 3011; brown RAL 3009; green RAL 6032. It is possible to produce a different shade of paint on request. Shikril - paint for slate Shikril paint can be used to paint both old and new roofs. The paint coating has: water-repellent properties, otherwise called hydrophobic; high levels of coverage and light fastness; special elasticity when exposed to low temperatures. Application of Shikril paint 1. The surface of the slate roof is cleaned of dirt, dust, and remnants of previously applied paint. 2. Apply the preparatory layer with the primer of the same name Shikril-Grunt, which is also intended for work on slate. For application use a brush, roller or spray gun. The roof is primed in one or two layers, with the next layer applied after the previous one has completely dried. Usually an hour and a half is enough for this. Work is carried out at positive temperatures of 15°C and above. The roof surface must be dry before starting treatment. Important! Using a primer allows you to reduce the cost of painting slate by saving paint. 3. Mix the roofing paint thoroughly and, if necessary, dilute it to a working viscosity with solvents, which can be butyl acetate or white spirit. Paint the slate roof sequentially from top to bottom, thoroughly mixing the painting composition 4. Shicryl paint is applied in two layers using the same tools used for priming the surface. Important! When carrying out work it is necessary to use by individual means protection.
Other paints for slate
1. “KILPI” is a Finnish acrylic coating for roofs, which is produced by the well-known company Tikkurila. Used for painting tiles, slate, roofing felt, bitumen fiber boards and other materials. Valued for its special elasticity with very low temperatures. One liter of coloring solution is enough to paint no more than two square meters of surface. Finnish slate paint 2. “DACHBESCHICHTUNG” is a German roof coating produced by DUFA. This semi-gloss paint is suitable for full coloring and partial repair painted surfaces made of clay, concrete or slate roofing tiles. The paint coating freely allows water vapor to pass through, while protecting the roofing material from the effects of precipitation. Features a high degree of adhesion. If the base is professionally prepared, the paint layer can last for many years. One liter of coloring mixture is enough for 7 square meters of roofing. 3. POLIFARB – AKROFARB is produced by the Polish manufacturer of paint and varnish coatings “Debiza”. The paint is made on the basis of acrylic dispersion. It is used for painting not only roofs, but also facades finished with clay-cement slabs or slate. The applied coating dries in three hours. A liter of paint is enough to paint 5-7 square meters of roof surface. Slate paint shades
4. “AKRILAKMA-SLIFE” is a Ukrainian water-dispersed acrylic paint intended for work on slate. Produced by LAKMA in two color options: red-brown and brown. After painting, you get a smooth, uniform matte film that dries in just one hour. One liter is enough to paint 6 square meters of slate surface. 5. “UNISAL” is a Slovak water-dispersion paint for slate roofs, which is manufactured in Russia by the company “Kvil”, located in the city of Belgorod. During production, the technology of the HELIOS company operating in Slovenia is followed. It is valued for its high degree of hiding power, weather resistance and light resistance. Used for household and industrial painting of slate, as well as other asbestos-cement products. Can be applied by hand or machine. IN color scheme paints include such shades as: white; brown; grey; oxide red; black; green. The time required for the coating to dry is no more than one hour.
One liter of paint is enough for five square meters. 6. “POLIFAN” is produced in the city of Kolomna by the company “Polifan-L”. A universal paint that is used not only for painting slate, but also for painting reinforced concrete, plastered surfaces, brick, chipboard, CBPB, curb stone and other materials intended for exterior finishing. Paint consumption is one liter per three square meters surfaces. German paint for slate roofs In addition to the listed paint and varnish products for slate, there are other brands on the market, which allows the buyer to choose best option taking into account price and quality. Now there should be no questions about how to paint flat or wavy slate, because they are based on the same asbestos-cement base. Now you know that you can make an old slate roof look stylish. At the same time, the entire appearance of the house will change for the better.
1. Start by applying the first layer, immediately after the primer has dried. As a rule, about two-thirds of the total paint is spent on the first layer, since a clean surface absorbs it very easily.
2. After the first layer of paint has dried, a second layer, the so-called finishing layer, is applied on top of it. The second layer is applied more carefully and carefully. To apply it, you can use a brush or a device for spraying paint - a spray gun.
To paint the roof, a wide brush or broom is suitable, which will allow you to thoroughly rub the paint into all the flaws and cracks of the surface.
A spray gun, which can also be rented in a store, will help to significantly facilitate the work and improve its quality.
In addition to all of the above, there is another “old-fashioned” way to restore slate. Take cement, dilute it with water to the consistency of liquid sour cream, add PVA glue in the amount of 1 cup per 1 bucket of the mixture. This covers the roof. In this way, you can not only improve the appearance of the slate, but also reliably seal small cracks.
Methods for painting slate:
Painting with a brush
This is the simplest method from a technical point of view. But at the same time, it is very difficult to achieve a high-quality, uniform coating with a brush, since painting is done in strokes.
Pneumatic spray painting
It is NOT RECOMMENDED to use such sprayers for painting roofs. This is due to the fact that manufacturers do not recommend diluting the paint by more than 5%.
- painting with a professional airless spray painting machine
Airless spraying is the ideal technology for applying paints in construction and renovation. Using a high-pressure pump (200 atm), paint is supplied through a special hose to the spray gun. In airless spraying technology, there is no need to dilute the paint, since such high pressure is quite enough to apply paint of any viscosity. When painting a slate roof with airless spraying, you can achieve a uniform and uniform coating.
Slate should be painted at a relative air humidity of 60% and a temperature of at least 15 degrees. With high-quality surface preparation and correct application acrylic paint will serve you for more than 10 years.
Do-it-yourself painting of slate with your own hands will significantly save your budget for home renovations, since the services professional craftsmen not cheap. Having done the painting yourself once, you will learn how to paint slate no worse than experienced craftsmen.
The fact that the use of paints allows slate to achieve the desired color is understandable. But, in addition to the decorative function, coloring compositions also have more important properties. Let us remember that slate is a porous material, prone to the formation of microcracks. Water easily gets into them, which with the onset winter cold turns into ice and begins to “tear” the fibers of the material. The same deforming processes occur when mosses and lichens grow in the pores. The problem of premature destruction of slate is solved by painting. Coloring compounds form a durable film on its surface, blocking access to asbestos cement to water and microorganisms. As a result, deforming processes are suspended and the slate gains additional years to its service life.
Painted slate, thanks to the paint film, becomes smooth. It does not retain atmospheric moisture and snow melts off easily. And if dirt accumulates on the roof, you can simply wash it off with water from a hose or car wash.
Another problem that can be solved by painting is the theoretical harmfulness of slate. The version that asbestos-cement sheets are not environmentally friendly came to us from the West and is successfully cultivated by many manufacturers of more expensive and modern roofing materials. Its essence is that slate during operation emits asbestos dust, which is harmful to the environment and human health. There is much evidence that this opinion is unfair, however, if this aspect bothers you, paint applied to the slate will completely block the possible release of asbestos dust and will 100% preserve your health.
Thus, staining slate allows you to:
· increase the decorative effect of the roof;
· give asbestos-cement sheets a color with the desired degree of matte (matte, semi-gloss, glossy);
· smooth the surface of the slate;
· protect slate from the growth of mosses and lichens on it;
· prevent the appearance of cracks;
· block the slate dusting process;
· increase the durability of slate by 1.5 times (subject to periodic renewal of the paint layer).
Type #2 - acrylic paints with organic solvents
These paints are not diluted with water, but with organic solvents. Contains: acrylic resin (synthetic latex), color pigments, additives, organic solvent (most often white spirit). The degree of matte finish of such paints depends on the resin content. The more it is, the more pronounced the gloss of the dried film of the composition.
Organic solvent paints are different:
· more durable film than water-dispersed compositions;
· high water-repellent properties;
· elasticity;
· lightfastness and long-lasting color intensity;
· pungent odor.
Solvent-based acrylic paints are presented in a small range on the market. Thanks to its excellent quality, matte paint “Eternit” from Polifarb (Ukraine), produced in red, brown and green, has proven itself among craftsmen. Due to its wear resistance, the color of this paint practically does not change even at the end of its service life. Another popular option is Shikril paint from KrasKo (Russia). It is easy to use and has a high degree of coverage.
Type #3 - organosilicon (silicone) paints
Organosilicon paints are rightfully considered the most reliable and durable for slate. They are suspensions of pigments and fillers in an organosilicon (silicone) binder. Thanks to the presence of silicone, this type paints are characterized by increased elasticity, so some of them are able to bridge cracks up to 2 mm thick!
Properties of silicone paints:
· high strength;
· maximum elasticity, the ability to carry out “repair” work and seal fairly wide cracks in slate using a silicone composition;
· fungicidal and algicidal properties that prevent the proliferation of microorganisms (in the pores and on the surface of slate);
· high water- and dirt-repellent properties;
· the possibility of excluding the priming stage from the painting process;
· silicones are non-toxic, do not have an aggressive odor, and are fireproof;
· service life is 10-15 years.
Repeatedly tested for painting slate, KO-slate enamel, produced by the Kremniypolymer plant (Ukraine). It impregnates the top layer of slate, providing deep, long-lasting color. The company produces “KO-slate” in two colors – red-brown and green, but there is the possibility of custom tinting.
The same Kremnipolymer plant produces enamel OS-5103K (color green), intended for protective and decorative painting of many materials, including asbestos cement. The material has increased heat resistance, acid and alkali resistance, and resistance to chemical gases. Thanks to this, painting slate with OS-5103K enamel can be done at industrial enterprises.
Type #4 - alkyd slate paints
The composition of alkyd slate paints consists of alkyd resins, pigments, fillers in an organic solvent. Alkyd enamels, as a rule, dry quickly and form an elastic film that is not prone to cracking.
Properties of alkyd slate enamels:
· high moisture resistance;
· increased adhesion to slate;
· weather resistance;
· does not require the mandatory use of a primer before painting;
· durability – 5 years.
An example of high-quality alkyd enamel is “Quick-drying enamel for slate” from the company “Impulse” (Ukraine). It is characterized by very fast drying (at 20˚C the layer dries in 1 hour) and has no pungent odor. Available in the most suitable colors for the roof: red, brown, blue and green. Another alkyd-based product is “Roof Enamel” produced by Empils (Russia). In addition to high protective qualities, the paint has a wide tinting base consisting of 10 colors.
Type #5 - polymer paints “Liquid plastic”
They are a suspension of polymers (polyurethane, vinyl or polystyrene), pigments and additives in a solvent. After the composition dries and the solvents evaporate, the paint forms a thin plastic (polymer) layer with a glossy or matte surface on the slate.
Characteristics of “liquid plastic”:
· absolute moisture resistance (completely blocks the access of water to the slate);
chemical inertness
· high drying speed;
· environmental friendliness;
· fire safety (does not burn after drying);
· resistance to fading;
· application without preliminary priming;
· high frost resistance, as well as the possibility of application at low negative temperatures (down to -10˚C);
· durability of the coating – 10-15 years.
Reliable polymer paint Liquid Plastic is produced by Denalt (Canada). This paint is produced on an alkyd-polyurethane base, which gives the composition special strength.
Polymer paint PPG-1 produced by Komoil (Belarus) is another reliable choice. Its composition contains polystyrene, which, after drying, forms a protective and decorative coating of various colors. The paint Ps-160 TM “Sticolor” (Ukraine) also has a polystyrene base. It is a weather-resistant enamel that forms an elastic surface with a glossy effect.
Variety of colors and tinting options
The most popular paint colors for slate are red, brown, and green. They appear in the range of most paints. At the same time, the color base of a particular material can include either 5 or 100 different colors and shades. But what to do if you want to paint the slate, say, light yellow, but the selected paint does not have such a shade in the range? Tinting will come to the rescue. Most paint manufacturers provide the ability to paint their paints in any tone corresponding to color catalogs - RAL, NSC, Symphony. Tinting at the enterprise is carried out using special equipment, using tinting pastes and paints.
You can also do the tinting yourself by adding tinting paste to the purchased paint and stirring the mixture with a mixer.
Slate coloring technology
The choice of paint and its color is a responsible process. But, unfortunately, even the most expensive and high-quality enamel cannot guarantee a reliable decorative and protective coating on slate. If you do not follow the painting technology, then the pigmented film will almost certainly behave unpredictably. For example, it will begin to crack, swell or crumble much earlier than the end of its service life (possibly even a few days after painting). Therefore, you also need to know how to paint slate correctly!
The process of painting slate is carried out in several stages:
Stage #1 - preparing the slate surface
The slate surface to be painted must be cleaned of dust, dirt, fungal and plant deposits, and unstable (or incompatible with the chosen paint) coatings.
Cleaning can be done in two ways: dry mechanical (manual or mechanized) and using pressurized water jets. Sometimes these methods are combined and performed alternately.
For manual mechanical cleaning use wire brushes to scrape off efflorescence, dirt, moss and lichens. The work requires considerable effort and accuracy, and the cleaning speed is very low. You can clean slate faster and better with the help of tools. To do this, put an attachment on a grinder or drill, which is essentially the same brush for metal. When the tool is turned on, it begins to rotate, cleaning off surface defects of the slate.
The second cleaning method is to wash the slate with high-pressure water jets, which are created by car mini-washes (Wagner, Karcher, etc.). In this case, the created pressure should be within 100-250 atmospheres. Mini washers that release water at a lower pressure will not be able to remove contaminants, while higher pressure mechanisms will destroy not only the defects, but also the slate itself.
Stage #2 - priming
To impregnate the top layer of slate, use special compounds– primers. They are selected in accordance with the instructions for using the specific coloring composition. For example, organosilicon paint Ko-slate is combined with silicone primer KO-011S. However, organosilicon paints, as well as “Liquid Plastic” compositions and alkyd enamels can be applied without prior priming. Acrylic paints, on the contrary, require the use of a primer. These can be either special compositions (for example, Dupa-grund for Alpina DACHFARBE) or paint diluted according to the instructions. To obtain an impregnating primer for Alpina DACHFARBE acrylic paint, it is enough to dilute it with water to 10% of the volume.
The primer is applied to the slate in 1-2 layers using a brush, roller or spray gun.
Stage #3 - painting itself
Direct painting is done over the dried primer. As a rule, it is enough to apply 2 layers of paint, the first of which will be the base, and the second – the finishing. The base layer is the main one; it must carefully cover the entire surface of the asbestos cement, including the ends, corners, joints, ridge and corner parts. After the first layer has dried, paint it again. The task of the second (finishing) layer is to ensure that the painted slate receives a bright, uniform color, without streaks.
Treatment is carried out with a brush, roller or spray.
This simple technology will give slate color and high decorativeness, comparable to the beauty of tiles, bitumen or metal roofing. In addition, painting (with periodic renewal of paint) will provide reliable protection for the roof from environmental influences and will increase its service life for decades.
And this type of sprayer requires highly diluted paint.
More recently, slate was so popular that two-thirds of buildings in our country were covered with it. Currently, in conditions of constant competition, each manufacturer is trying to improve the quality and diversify the products they produce. roofing materials. Despite this, slate is still in demand, and all thanks to its positive aspects, which have remained unchanged over time. This is a low price, good water and frost resistance, and a long service life. But these qualities are not always the main ones when choosing a material for the roof, especially considering that over time slate acquires a gray-green color, especially on the north side, which is often covered with moss. And just new factory slate will not add any zest to the new home.
Recently, such types of slate have been used as profiled sheets, flat slabs and roofing panels.
If you still choose slate, there is one option that will help decorate the appearance of the house, namely painting the slate.
Preparing slate for painting
To paint slate, you need to prepare the following materials and tools:
- metal brush;
- drill;
- Bulgarian;
- high pressure jet washer;
- construction antiseptic;
- brush;
- spray;
- respirator;
- glasses;
- gloves;
- acrylic or enamel paint;
- primer.
Before you start painting, you need to do this, especially if it has been in use for several years.
Can be cleaned in various ways.
A regular metal brush is suitable for cleaning slate, but it is better to use a steam unit.
The first is to clean it yourself using a regular metal brush. This method is the most labor-intensive and time-consuming, but the efficiency and quality leave much to be desired. The main requirement when performing this work is that the roof is not wet.
The second method is to clean the roof using a special attachment on a drill or grinder. Cleaning the roof in this way has only one advantage - it is quality due to the use of power tools. This does not reduce the cleaning speed.
The third method is the most effective, and most importantly, it allows you not to stop working due to weather conditions. Its essence lies in the fact that slate is cleaned with water under high pressure. In order to clean the roof this way, you will need a specialized washer to create a high-pressure jet. The optimal pressure for such a process should not exceed 250 atmospheres. This is due to the fact that an increase in pressure above the norm can damage the slate itself, and a jet with low pressure levels will not allow the surface to be properly cleaned.
The undoubted advantage of this method is that it will take only 1-2 days to clean a roof with an area of 100 m2.
Treatment of slate before painting
The next step in preparing slate for painting on your own is its subsequent hydrophobization.
As you know, fungal spores multiply in a damp environment, so the slate needs to be treated with a product to increase water repellency.
The result of cleaning the slate: not a trace of debris, mold or fungi remained.
It is also important that old slate has increased porosity and is therefore susceptible to premature destruction in conditions high humidity. Hydrophobization is used to prevent this and to increase the service life of slate.
To give the treated roof an aesthetic appearance, they resort to painting it. Of course, in ideal painting the roof (slate) is carried out immediately before starting roofing works. But, as a rule, it is after several years that the owners only begin to think about what to do with the terrible roof and how to paint the slate that is already lying there. In turn, the stage is the most important and final.
Sometimes the average person may wonder whether slate can be painted. The answer is simple: not only is it possible, but it is also necessary. Paint is an additional protective layer that will strengthen the slate structure from destruction. Painted slate is less susceptible to severe frost.
Choosing paint for slate
Paint on slate is easily applied with a regular brush.
Correctly chosen paint is the key to not only the beauty of the future roof, but also high-quality protection. Nowadays, slate paints are presented in acrylic and enamel samples.
Experts recommend using these types of paints for painting, since they are designed to close all microcracks on the slate, and the film formed as a result of painting will cope perfectly with atmospheric phenomena. These paints contain binding components, which make them ideal for painting. In the case where the roof is used in extreme weather conditions, with different ambient temperatures, it is best to use quick-drying enamels.
And yet, when you need to choose what to paint slate with, it is recommended to turn to specialists. They will always help you choose the right paint, taking into account the actual condition of the roof.
The quality of painting is influenced not only by correctly selected paint, but also by the technology of the application process itself. Basically this process can be broken down into three stages:
Instead of a brush, you can use a special paint sprayer - this will significantly speed up the process of updating the roof.
- Coating the slate surface with a primer.
- Painting the slate with the first coat of paint.
- Applying the second (finishing) coat of paint.
For priming, it is better to use compounds with deep penetration, which will ensure significant strengthening of the slate surface. It is much easier to paint a pre-primed roof, since, thanks to the primer, the paint will apply more evenly, and its consumption will be significantly less than without pre-treatment. The recommended primer consumption is 100-150 g per . It is best to apply the primer with a sprayer, at an air temperature ranging from +5 to +30 degrees. Complete drying time is about 12 hours. After this time has passed, you can only begin to paint. It is not recommended to work with soil solutions with unprotected hands; you should avoid getting them in your eyes. Properly preparing the slate surface before painting is the guarantee that the paint will last for many years and will not have to be repainted.
After applying the primer, you need to let the roof dry for a day, and the next day you can start painting it.
Slate painting technology
When starting to paint slate with the first layer, you need to take into account the fact that it is the main one and 2/3 of all paints and varnishes are consumed on it. The slate sheet painted with the first layer should not have gaps; do not forget about the ends and corners. It is necessary to pay due attention to places that are most difficult to reach. Already after applying the first layer of paint, the roof is given an unrecognizable appearance, but you still shouldn’t stop there. The next layer is no less important.
Start painting finishing layer This is possible after the slate painted with the first layer has completely dried. Applying paint a second time will give the already painted roof a uniform color and get rid of streaks. As a rule, 1/3 of all paint is spent on this layer.
Painting slate by hand is not so much a long process as a labor-intensive process that requires certain skills.
The technology described above can be safely used for painting both wavy and flat slate. Thanks to this simple technology, roofs are given an aesthetic appeal that will decorate any building. And, of course, painting slate will increase its service life under environmental conditions.