In the modern construction market there is a huge selection of roofing materials, but, despite this, ordinary gray slate has not lost its popularity. This is explained by its good performance, resistance to temperature fluctuations in the external environment, long service life and low price.
Houses covered with slate in the last century serve their owners with faith and truth, but the roof surface, while maintaining its performance characteristics, has an unsightly appearance. Staining slate helps to correct the situation. Do-it-yourself slate painting is quite possible, you just need to know how to do it correctly.
Perhaps painting slate is an interesting and even enjoyable activity.Why do people paint old slate
Slate painting allows you to get rid of these negative phenomena. People paint old slate for the following reasons:
- the release into the environment of finely dispersed asbestos particles harmful to health is reduced;
- waterproofing qualities are improved;
- increased resistance to temperature fluctuations in the external environment;
- the operational period is significantly increased;
- the development of pathogenic microflora is prevented;
- the painted surface has high decorative properties.
The painted roof is in good harmony with the color of the walls Of course, it is easier and easier to paint at the stage of roofing installation. In this case, the slate can be painted on the surface of the earth and then installed in its place.
However, it often happens that the owners of private houses think about performing this procedure after several years of operation, when the surface that has turned green from moss absorbs moisture and creates an increased load on the rafter system. At the same time, green paint is very popular.
Preparing for painting is an important and no small job
An important stage in the work is preparing the surface for painting. Ultimately, the long service life and high performance of the topcoat depend on this. All technological subtleties of the dyeing process should be observed.
Before starting work, the surface must be thoroughly cleaned. The simplest way to perform this manipulation, which does not require the use of special tools, is mechanical cleaning with a metal brush.
It is very convenient to clean slate with a high pressure car wash Work should be done in dry weather, as the mechanical strength of a wet coating decreases. Cleaning in this way requires a lot of time and physical effort. A grinder or a drill with a brush installed on it allows you to reduce the physical effort to perform this work, but this requires a faithful eye and a steady hand in order not to damage the coating.
The surface is cleaned most quickly and efficiently with a high pressure water jet. Such devices are used for washing vehicles. The optimal pressure will be from two hundred to two hundred and fifty atmospheres, with a lower value, it will not be possible to qualitatively remove contamination, with a higher value, a directed water jet will break the coating.
When performing all manipulations, personal protective equipment for the respiratory and vision organs should be used, since asbestos dust will rise into the air. You need to work in a suit made of dense fabric, a respirator and glasses.
What paint and primer is better to paint the roof of a house
Before you start painting the slate surface with your own hands, it must be impregnated with a special compound that prevents the development of pathogenic microflora. Apply it with a wide brush, paint roller or spray bottle. To ensure high-quality protection, antiseptic treatment is performed in several layers.
There are special primers for slate Then a composition is applied to the coating to prevent moisture penetration. Due to the porous structure of the slate, its premature destruction occurs precisely from the aggressive action of water. After antiseptic and moisture-repellent treatment, a layer of primer is applied. It provides high-quality adhesion of the paint to the base and reduces its consumption. The primer should be purchased from the company that produced the main paint material, and should contain components that prevent the development of pathogenic microflora.
The paint and varnish material used for painting must resist well the aggressive effects of the external environment, heating by direct sunlight, and have water-repellent properties. Such qualities are possessed by acrylic and alkyd paints, coatings on polymer and silicone bases. We'll figure out which one is better a little later.
Coloring is done in two layers, the first of which is the main one. You can apply paint with a paint roller, a wide brush or a spray gun. Of course, the slate surface is painted in dry, calm weather.
Acrylic paints
The most widely used are water-soluble acrylic compounds. They do not emit a strong odor and toxic substances, thanks to their water base, they do not ignite when exposed to an open flame, do not require the use of solvents and form a waterproof coating, which lasts about five years. The acrylic paint applied to the surface dries within sixty minutes. The disadvantage is the liquid consistency and streaks can form on the coating.
Slate paint options Silicone based coatings
Silicone-based coatings are considered the most reliable and durable. Due to their high elasticity, they are able to fill rather deep cavities, they can be used without applying a primer layer. The silicone surface has high mechanical strength, excellent dirt and moisture repelling properties.
Filling the pores of the slate well, it prevents the development of pathogenic microflora in them. The material does not support the combustion process, does not emit harmful substances and an unpleasant odor into the environment. The service life of the coating is about fifteen years.
Alkyd paints
Alkyd paints are characterized by short drying times, while forming a non-cracking elastic surface. They have excellent adhesion to the slate surface, high resistance to aggressive environmental influences and atmospheric moisture, and do not require priming of the base before application. Average service life is about five years.
Polymer-based coatings
Polymer-based coatings that include vinyl, polyurethane or polystyrene form a glossy or matte plastic layer when applied. It completely blocks the penetration of moisture to the slate surface, is inert to chemicals, does not fade from ultraviolet radiation, does not support the combustion process, and is environmentally friendly.
Polymer-based coatings are well resistant to negative temperatures, application is possible without the obligatory priming. The operating period is about fifteen years.
Choosing a color and tint
The most common colors for roofing surfaces are green, brown and red. However, the color palette offered by manufacturers of this type of product can consist of more than a hundred colors and shades. Do-it-yourself green slate roof is very common.
Roofing green is very popular What should you do if you want to paint the surface with a non-standard color that is not in the company's catalog? Which color scheme to choose? The desired shade can be created by adding tinting paste to the paint and stirring it well. Most companies provide for the possibility of tinting, that is, obtaining any tones of the color palette. When choosing a color, you need to take into account the surrounding environment, while the green roof will be lost in a dense garden.
When finishing a slate roof with your own hands, you should heed the advice of craftsmen. In order to feel safe when working at height, a safety harness should be used. Cleaning, priming and painting of the surface must be done in a protective suit, goggles and a respirator.
If no spray gun is available, paint flat slate with a paint roller, not a wide brush. To dry the first layer, you need to leave more time than indicated in the instructions, most often it considers ideal conditions that differ from reality.
You can paint the slate even before installation or directly on the roof using a brush or a spray gun Before performing the work, you need to familiarize yourself with the weather forecast for several days in advance: the coating will last longer if it does not rain after the final stage. On a steep gable roof, it is best to work with an assistant. A high-quality painted surface of the roof will delight the owners with its appearance for many years, the coating will not peel off and will not crack over time.
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The following video has been carefully selected and will certainly help the perception of the above.
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The simplest slate (gray), after painting in a different color suitable for your roof, looks completely different.
The latest technology provides the ability to repaint gray slate sheets and transform the roof of your home, making it bright and attractive.
How to paint a slate roof?
First, let's ask ourselves the question, why do you need to paint a slate roof? Slate is a very durable roofing material and has proven it with its durability and endurance for decades. But one has only to look at the monochromatic gloomy gray roof, as the question of painting it immediately comes to the fore.
Painting the slate not only gives it a beautiful appearance, but also protects the surface of the material from environmental influences, thereby reducing moisture penetration and increasing frost resistance.
Hence, it should be concluded that painting slate increases its service life for an even longer time and gives it a beautiful and natural look.
Now let's look at how you can paint a slate roof. There are three types of paints for painting this roofing material:
- Acrylic "liquid rubber";
- quick-drying;
- "Liquid plastic".
Liquid plastic is one of the least suitable paints for this type of roofing material. Since it has a low weather resistance compared to the other two types. This paint gives off a characteristic and rather unpleasant odor.
Fast dry paint possesses excellent decorative properties and is also highly resistant to sunlight and weather conditions. The paint has a low consumption depending on the shade you need - only from 100 to 150 grams per square meter. The paint retains its properties on the coating for about five years.
Acrylic paint has the greatest durability of all types of paint, and it is also a cleaner and less harmful product. This paint forms a water-repellent surface on the slate surface, which retains its properties for more than ten years (of course, if it is applied correctly).
Due to its slippery surface, which is formed after paint treatment, snow flies off the roof faster, thereby reducing the load on the roof sheathing and its rafters. This is one of the important points, since slate is a very heavy roofing material.
The consumption of this paint is twice as high as that of the quick-drying paint and is about 300 grams per square meter.
Preparing slate for painting
It is absolutely possible to paint even the slate that is already on your roof. If such a roof was installed a long time ago, then we can say with 100% certainty that moss has formed on it, especially on the northern side of the house.
Naturally, paint cannot be immediately applied to such slate. First you need to remove all dirt and the moss itself. And this can be done in several ways:
Mechanical method. Using iron brushes to remove moss from the slate surface. To facilitate this work, the slate is moistened with water. This method is the most time consuming and least effective in its application.
You can use a drill with a special iron brush for this method, but only without the use of water.
The best way to remove moss from the roof is to remove it with a washer (common household). With the help of a strong pressure of water, moss and other natural phenomena seem to be cut from the surface of the roof. After cleaning in this way, the slate must be dry. The next step will be to inspect the slate with the replacement of damaged sheets with new ones.
After removing natural contaminants from the roof, the slate must be treated with a chemical composition that helps protect it from fungus and mold. This composition is applied both manually and by spraying. Remember to take precautions when handling substances that are harmful to your health. Use a respirator and protective clothing.
Next, you need to prime the slate surface. Priming the surface will not only provide it with good adhesion for the paint, but also prolong its life. The primer will also help you reduce paint consumption, since the slate absorbs any paint like a sponge.
Choose a primer according to the paint you intend to paint your roof surface with. Thoroughly apply the primer to the surface, without missing a single spot, this contributes to an even laying of the slate paint on the surface of the entire sheet.
If you just conceived of covering the roof with slate and do not want to spend money on a finished painted one, then the same painting steps can be performed with new sheets of your roof - it will be even easier and more convenient than doing all this at a height.
Painting slate on the roof
Experts recommend painting the roof in the spring. The most favorable temperature for painting a slate roof is between 15 ° C and 25 ° C (despite the fact that manufacturers allow painting from 5 ° C to 30 ° C).
For the most correct drying of paint on slate sheets, the best weather is cloudy.
You can paint with the most common brushes for painting walls and other types of work. Although this method is not ideal, as it often leaves streaks and streaks on the slate, and it is also very time-consuming.
If you have covered your roof with flat slate, then use a roller. The roller will better distribute the paint over the surface with the same layer and without streaks. Due to the thickness of the paint, it is unlikely that spray compressors can be used. They will simply clog with you.
There is a special machine designed for airless painting, but you should not buy it for everyday life, since it is very expensive and will probably not be useful to you in the future, unless of course you are going to work in this direction.
Therefore, it is better to use the first two tools for painting the roof or hire workers with special equipment.
In the heading |For any house, the roof is an important element that protects it from the effects of wind and precipitation. No less important functions are also heat protection and making the building look attractive. From a huge list of widely used roofing materials, many consumers choose ordinary asbestos-cement corrugated slate. They make their choice due to the many advantages of this material.
- Cheaper than other roofing materials.
- Durability.
- High strength allows it to withstand the weight of a person during installation, as well as the weight of the snow cover.
- Low noise.
- Not flammable.
- It does not corrode and is a good insulator.
- Heats up a little in sunny weather.
- Perfectly processed with mechanical tools.
- Slate roofs are easily repaired by replacing broken sheets.
In addition to the advantages, slate has the following disadvantages:
- It is a rather heavy building material that requires significant physical effort when performing its installation.
- A very fragile material that requires careful, careful handling during transportation and during installation.
- Moss may become covered over time.
- It contains asbestos, which is harmful to human health.
To eliminate the last two drawbacks, you can paint slate sheets using special paints. To carry out this work, it is advisable to attract professionals from a specialized firm. But if you have the necessary skills and free time, then painting the slate with your own hands will allow you to reduce costs.
The article outlines the main points related to painting slate.
Preparatory work
Of course, the easiest way is to paint the new slate, even before it is laid. In this case, you do not need to perform additional work before painting: use a scraper or a stiff brush to clean the old slate from dirt, moss and lichens. Please note that in order to obtain a high-quality result, these works should be performed in dry weather.
To exclude the growth of fungi and the formation of lichen, it is necessary to treat the surface of the slate with an antiseptic. The composition can be applied with a wide brush or spray, observing all necessary safety measures (use a respirator, gloves and goggles).
Video
Surface priming
It is produced after the antiseptic layer has dried. Due to the deep penetration of the primer into the pores of the slate, its surface is strengthened and an excellent adhesion to the slate of the applied paint layer is ensured. The primer should be applied with a roller or spray. For best results, use a primer from the same manufacturer as the paint. You should not abandon the use of a primer, because without it, due to the high porosity of the slate, despite the increase in paint consumption, you will not be able to achieve uniform coloring of the entire surface.
Slate painting
After the primer has dried, you can start applying the so-called first coat of paint. It is considered basic, basic. You should carefully paint over all the ends of the slate covering, hard-to-reach places and corners.
To obtain a uniformly colored surface and avoid the formation of streaks and transitions, it is necessary to apply the same paint as a topcoat to a completely dried base coat.
About two thirds of the amount of paint and varnish material is consumed to create a base coat (one third is consumed to create a finishing layer).
To obtain a durable finish, use a special acrylic paint, and paint work should be done in summer, in dry but not very hot weather.
Video
This is how the slate is painted with a spray gun:
Asbestos-cement slate roofs have been used in construction for more than a dozen years, and slate is the most widespread roofing material in Russia. Asbestos cement is an artificial stone material obtained as a result of the hardening of an aqueous mixture of Portland cement and finely fluffed fibers of chrysotile asbestos, reinforcing the cement component.
Asbestos-cement products have high mechanical strength in bending, low density, low thermal conductivity and water permeability, high frost resistance, alkali resistance, and are also characterized by sufficient biostability. Ultimate strength of asbestos-cement slate sheet: in tension - 20 ... 25 MPa, in bending - 27 ... 42 MPa, in compression - 45 MPa and more.
Slate roof protection - slate processing
The disadvantages of asbestos cement include: reduced strength when saturated with water, brittleness and warpage with changes in humidity, weak resistance to impact.
How and how can slate be processedso that it does not turn green and black?
In order to get rid of these shortcomings, waterproof compositions are applied to the surface of asbestos-cement products that protect the material from moisture, mechanical damage, ensure a good drainage of water and do not retain dust.
To do this, a sheet of asbestos cement is dried to 7 ... 6% moisture, after which its surface is cleaned of dirt, primed and finally painted with weather and water resistant paint compositions.
By the way, to increase water resistance and reduce the release of asbestos dust, which causes specific diseases, the back of the product is also primed.
Coloring of slate sheets with perchlorovinyl compounds (PVC, TsPHV, KhV-161) is performed at a temperature not higher than + 4 ° С (due to the toxicity of the compositions) and not lower than -20 ° С.
To do this, first, a perchlorovinyl soil is applied to the surface of the sheet, which dries up in summer conditions in 2 ... 3 hours.
The dried surface is painted with perchlorovinyl compounds using a paint spray gun (preferably CO-71A brand). With a mechanized method of painting, the composition must be systematically mixed in a paint injection tank to avoid stratification. During operation, the distance from the gun to the surface to be painted must be at least 0.5 m, the gun should be moved along the surface evenly, at a speed of about 0.3 m / s.
Slate is painted in stripes. The first strip is applied from top to bottom, the second - to the right of the first, but from the bottom up, the third, like the first, and so on. To obtain a continuous coating (without gaps), it is necessary that each subsequent strip overlaps the previously applied 3 ... 4 cm. Usually, two layers of the composition are applied to the slate, and the second layer is sprayed only after the first has dried.
In case of double painting with PVC composition per 100 m² of surface, the following is consumed (kg):
PVC paint - 59;
PVC primer - 15;
Solvent (solvent; R-4; 5% PVC varnish) - 10.
When applying a ready-to-use cement-perchlorovinyl compound (CPVC) per 100 m² of surface, 41 kg of the composition is consumed for the first painting, and 36 kg for the second.
Slate surfaces are also treated with KO-174 enamel, which is a dispersed system (suspension) consisting of a solid phase (fillers) and a liquid phase (KO-85 silicone varnish diluted with a solvent - a mixture of butyl acetate, acetone, xylene and toluene).
As a result of the evaporation of the solvent, the enamel hardens. The drying time of the enamel at a temperature of 18 ... 25 ° C is about 2 hours. The enamel has good adhesion, so it reliably adheres to asbestos-cement sheets, and the enamel coating is characterized by high strength and water resistance.
The thickened enamel is diluted with R-5 thinner. Before painting with enamel, the surface is prepared in the same way as before painting with perchlorovinyl compounds. Before painting, the slate must be dried, since its moisture content should not exceed 8%.
The enamel is applied 2 ... 3 times with a paint brush or a paint sprayer. Each subsequent layer is applied 1 ... 2 hours after the previous one. Please note that enamel is toxic, so it is used only for outdoor use.
Cover with slate and organo-silicate compounds. One of the most durable compositions is the OS-12-03 composition, which consists of the paint itself (a suspension of organosilicon polymers and inorganic additives in toluene) and a hardener - polybutyl titanate or butyl titanate.
Before use, a hardener is added to the coloring composition in an amount of 1% of the paint mass and the composition is thoroughly mixed in a container for 1 hour using a nozzle with blades. The paint hardens as a result of a chemical reaction between the components. The solvent used is xylene or toluene. The coating has good adhesion and adheres securely to concrete, cement, silicate brick, ceramics and metal (with the exception of halogen-containing plastics).
On slate and metal roofs, the organo-silicate composition is applied at a temperature of -40 ° C to + 40 ° C, using a swing paint brush, roller or paint sprayer.
The composition dries quickly - in 30 minutes. The "viability" of the composition prepared for application is 24 ... 48 hours. In case of a two-layer coating of asbestos-cement or concrete surfaces with a brush, up to 400 g of the composition per 1 m² are consumed. Of course, the composition is applied to the surface, previously cleaned of dust, lubricating oils, by spraying with a mortar.
When working with a paint spray, a nozzle with a diameter of 1.8 ... 2 mm is used and a round torch is formed from the paint.
In the process of applying the paint, it is thoroughly mixed by hand.
Slate asbestos-cement sheets are also painted with silicate paints prepared on the basis of potassium soluble glass (K2O mSiO2) with a density of 1.3 ... 1.5 g / cm³. Silicate paints also contain a separately supplied mixture of pigments and chalk, taken in a 1: 1 ratio (by weight).
The value m is the ratio of the number of silica molecules (SiO2) to the number of alkaline oxide molecules (K2O) and is called the silicate modulus of glass. For potassium glass, m is 3 ... 4. The higher the modulus, the higher the quality of the liquid glass.
The density of glass depends on its concentration. Often, liquid glass comes from the manufacturer with a high density, so it must be diluted with water.
How to paint a slate roof: technology
The required amount of water is calculated by the formula:
U1 \u003d U2 (p1-p2) / (p2-1000),
where U1 is the amount of water to be added to the solution, l;
U2 — initial volume of liquid glass, l;
р1 and р2 - initial and required density of liquid glass by hydrometer, kg / m³.
There are 10 liters of liquid glass with a density of 1500 kg / m³. It is necessary to obtain a solution with a density of 1370 kg / m³. It is required to determine the amount of water U1 that must be added to the solution. The amount of added water is equal to:
U1 \u003d 10 * (1500-1370) / (1370-1000) \u003d 3.5 liters.
Before use, the composition is filtered through a mesh No. 0.25 containing 694 holes / cm².
Silicate paints are made only with alkali-resistant pigments and have fire retardant properties. It is impossible to prepare a paint composition for future use, since after a day it becomes unsuitable for further use.
For silicate paints, it is allowed to use only potassium glass, since the presence of sodium glass (Na2O mSiO2) causes the appearance of a white bloom on the painted surface, the so-called efflorescence.
Therefore, before using silicate paints, it is necessary to check their quality, that is, to establish that there is no sodium soluble glass in them.
To do this, take a red clay brick, the five sides of which are painted twice with the test paint. After the paint film is completely dry, the "experimental" brick is moistened with water until completely saturated and placed on the unpainted side. If there is an admixture of sodium glass in soluble glass, then after 1 ... 2 days a white bloom will appear on the painted surfaces of the brick and the paint will begin to "shallow" when rubbed by hand.
The priming of the slate surface before painting is carried out with liquid glass with a density of 1.41 g / cm³, while the consumption of liquid potassium glass is 27.3 kg per 100 m².
The first painting is carried out with a composition with a density of 1.14 g / cm³, the second - 1.18 g / cm³. Consumption of liquid potassium glass (per 100 m²) for the first painting is 14.8 kg, for the second - 11.1 kg. Let's not forget about the dry pigment mixture, which will require 30.9 kg for the first color, and 26.6 kg for the second.
Asbestos-cement slate sheets are painted in warm weather (at positive temperatures), avoiding painting in direct sunlight.
To give the applied film water-repellent properties, hydrophobic additives - organosilicon liquids (GKZh-10 and GKZh-11) are introduced into silicate compositions intended for the second color. They do it like this. Diluted liquid potassium glass (density 1.15 g / cm³) is loaded into the mixer, then the required amount of pigments is poured in and the components are mixed until homogeneous, to which GKZh-10 or GKZh-11 (commercial 30% concentration) is added.
Consumption of hydrophobic additives 2.3 kg for the amount of liquid potassium glass required to cover 100 m² of slate.
Of the anhydrous compositions for painting asbestos-cement slate sheets, the following paint brands are used:
White lead thick grated (MA-011; MA-011-N-1; MA-011-N-2),
White zinc thickly grated (МА-011; МА-011В; МА-011Н; МА-011НВ),
Oil paints (MA-011 and MA-015; thick-grated special),
Oil and alkyd colored thick-grated paints (MA-011; MA-015; GF-013; PF-014),
Ready-to-use oil and alkyd paints (MA-11; MANN; MA-15; MA-15N; GF-13; GF-13N; PF-14; PF-14N; MA-21; MA-21N; MA-22; MA-22N; MA-25; MA-25N),
Lead greens thickly grated (MA-011-N-2; MA-011-N-3; MA-015-N-2; MA-015-N-3),
Oil and alkyd paints, earthen, thickly grated (red lead, mummy, ocher).
All types of primers and the above-mentioned anhydrous paint compositions for external coatings are prepared only on natural drying oil and diluted only with natural drying oil!
Coloring is carried out as described above. Before starting to cover asbestos-cement slate surfaces with a protective composition, it is necessary to perform preparatory work to clean them from dust, soot, dry and prime the slate.
I repeat, it is not allowed to paint in dry and hot weather when exposed to direct sunlight, as well as during rain or on a damp surface, you should not work in strong winds.
The most favorable time of the year for painting an asbestos-cement roof is the spring months. Painting work is carried out using special ladders, ladders, evenly distributing the weight of a person over the surface of asbestos-cement slate surfaces, which excludes their damage.
All materials of the section "Repair and construction"
How to paint the slate?
1.Characteristics of slate as a roof covering
2. Repair of slate roofing
3. Cleaning the roof
4. Elimination of cracks and replacement of sheets
5. Painting slate
Such roofing material as slate is always popular and regardless of the appearance of new coatings on the market.
It differs not only in its reliability, but also in its affordability. Slate painting is performed in order to increase the operational life of this roofing coating. Therefore, it is worth figuring out how to paint the slate and how to paint the slate on the roof, as well as how to repair the roof. Detailed instructions with photos and videos of this process, if desired, can be easily found on our website.
Characteristics of slate as a roof covering
This material, which at one time was made using shale, is one of the oldest materials of its kind. Of course, such a natural slate slate is quite difficult to find today, partly due to the fact that it has an incredibly high price (read: "Installation of a slate roof - installation methods").
However, an artificial version of such a coating - flat or corrugated asbestos-cement sheets - is very widespread today.
In our time, other roofing materials are offered that have some relation to slate, for example, euro-slate, which is based on bitumen (read: "Euro-slate - reviews and main characteristics"), metal slate, etc.
But slate made of asbestos cement, nevertheless, is still the most popular example of roofing.
The main advantages of slate:
- do-it-yourself slate roof is easy to do;
- low level of thermal conductivity;
- resistance to low temperatures and atmospheric phenomena;
- affordability;
- fire safety.
Slate roofing is by definition reliable.
This is especially true for the roof, where painted slate is used, since the protective film created by the paint for the slate helps to increase the resistance of the slate to various mechanical and natural influences, therefore, the operating life of the roof is lengthened.
In addition, slate is a completely repairable material. So, if any cracks or defects appear on the slate sheets, then there is absolutely no need to redo the entire roof, even if a significant part of the material is completely destroyed.
It will be enough just to replace the damaged sheets, taking into account the size of the slate that was used earlier.
What and how to paint flat slate? Market offer overview + step by step instructions
In the case when painted slate is used, there is absolutely no danger to health, since the paint not only increases the reliability of the roof, but also stops the emission of dust, which contains asbestos particles.
Slate roof repair
No matter how mobile and easy to repair the slate is, if any defects appear, repairs still need to be done, and the faster the better.
Usually, repair work consists of three stages:
- cleaning the roof;
- elimination of cracks or, if necessary, replacement of sheets;
- slate painting.
Do-it-yourself repair of a slate roof with strict adherence to the rules of all three stages will allow the roof to last for more than a dozen years.
Roof cleaning
Usually, if painted slate acts as a roofing material, then cleaning the roof will not present any difficulty, it will only be necessary to sweep out only all the debris accumulated on it.
If the slate sheets are not painted, then this can lead to the appearance of moss and lichen on them, which, of course, cannot have a positive effect on both the appearance of the roof and its operational properties.
One of the tools used to clean the roof is a metal bristle brush. The work can be simplified by using a drill with a nozzle like a wire brush.
Plain water, which is supplied under pressure, can also clean slate well.
Compact portable car washes are perfect here.
Elimination of cracks and replacement of sheets
The basis for repairing relatively small cracks on slate can be mastic, the basis of which is bitumen or a special putty made using chalk and drying oil.
A special composition for repairing cracks can also consist of the following elements:
- 2 cement parts;
- 3 asbestos parts;
- pVA glue diluted in a ratio of 1/1 with water or undiluted water-based paint, resistant to frost.
Liquid elements should be selected in such a volume that the final composition has the consistency of a thick paste.
Due to the rapid solidification, these formulations must be prepared in small portions.
Another option for sealing wide cracks is gluing patches made of fabric onto them.
In this case, the desired place is primed, and then a patch is applied to a thick layer of paint, the size of which should be 10 centimeters larger than the crack size. Next, the patch needs to be covered with an additional layer of paint.
Replacement of damaged slate sheets belongs to the same stage of repair. For this, special bridges are mounted on both sides of such a sheet, for which ridge brackets serve as fasteners. To move on the roof during repairs, in this case, a wide board is placed across these walkways, on which, if necessary, you can walk.
Nails and screws on the required sheets must either be completely removed or loosened. If nails are removed with a nailer, it is important to place a piece of wood underneath the tool.
The required sheet, that is, the one that is to be replaced, must be lifted and a new one must be put in its place. It should be located along the edge of the floor and move towards the ridge. The newly installed sheet is secured with screws or nails.
Slate painting
All professionals agree that it is not only possible to paint slate, but also necessary, since this significantly improves the properties of the roof and extends its service life.
An important factor is the aesthetic appearance of the painted roof.
Therefore, painting the slate with your own hands may well be done; the more difficult question will be how to paint the flat slate. Previously, standard oil paint was used for this, despite all the negative nuances of this method (fragility, tendency to rapid destruction).
Nowadays, special paints and varnishes are becoming more widespread, which are suitable for painting not only slate, but also tiles, concrete, etc. The basis of such paints is acrylic, due to which these compositions are resistant to low temperatures, sun radiation and precipitation.
This, of course, has a positive effect on the aesthetic appearance of the roof, which will remain so for a long time.
When deciding what to paint slate with, you can choose a special slate paint called triora. It is resistant to external influences, in addition, it can be used for both slate and shingles, and even to cover the basement of a structure.
There are also other paints produced by both domestic and foreign manufacturers (read: "How to paint a slate roof: technology").
It is quite possible to paint the slate with your own hands, that is, without the participation of professionals. Of course, the best option would be to paint the slate sheets even before they are laid, but during repairs this will not work, therefore, paint will need to be applied to the already laid sheets.
3 stages of slate painting:
- primer is applied;
- the main coating is applied;
- finishing coat is applied.
The painting tool can be a spray gun or a paint brush.
Flat slate can also be painted with a roller, the size of the flat slate allows it.
Before applying the primer to the slate, it will be correct to treat the coating with an antiseptic solution, which is most often sold in a concentrated form and diluted with water before use.
The use of such a solution will prevent fungus or lichen from appearing on the slate. It can be applied either with a wide brush or with any device capable of spraying liquid. It is important to remember about protective equipment - glasses, gloves, respirator.
Then a slate primer can be applied, which often contains acrylic liquid compounds that can penetrate deeply into the pores of the coating, thereby giving it greater reliability and better adhesion of the slate to the paint.
Painting the slate on the roof, watch the video:
Very often, a primer from one or another manufacturer is offered together with paint, so it would be better to opt for exactly the same brand. The primer is applied in the same way as the paint: you can do it with a spray or roller.
Due to the fact that slate is a porous material, painting it without a primer will be uneven, which will definitely lead to overspending of paint.
After the primer has dried, the base coat can be applied. It is very important to apply it well to all corners and ends of the coating.
The final coating is designed to give a slate roof a beautiful appearance.
It helps to make the surface uniform and uniform, without visual transitions and paint streaks. This layer can be applied only after the main layer has dried.
The paint for the final coating is the same as for the main one, the only difference is in its smaller amount.
The last stage requires approximately one third of the total paint volume, and the base coat requires two thirds.
So, painting the slate can be done with your own hands. This will provide an excellent opportunity to save a significant part of your finances, since the services of professional craftsmen are usually not very cheap.
Whatever one may say, the correct painting of something is ensured by two things - the correct choice of coloring agent and, of course, thorough observance of the technology of its application. No exception in this regard is such a roofing material as slate - with the right approach to business, you can enhance its aesthetic characteristics for a long time, and this can be done using various materials. In this article, together with the website, we will deal with the question of how to paint the slate - we will study the materials used for this purpose and get acquainted with the technology of its direct painting.
How to paint the slate on the roof photo
How to paint slate: why you need to do it
There are not so many reasons prompting a person to paint, and in most cases it is a desire to get a decent-looking roof with high aesthetic characteristics. At least, this is the thinking of an ordinary person who wants to reduce the cost of manufacturing or at home. In fact, slate painting has other goals - with the help of this process, you can achieve a significant increase in the operational parameters and the mass of other technical characteristics of this roofing material.
It is also possible to note such a fact as the reduction of emissions into the environment of toxic substances - it is no secret to anyone that the asbestos contained in this roofing is by no means useful for humans and all living things. In general, it is not only possible to paint slate, but also necessary - many modern manufacturers of this material offer even painted slate with improved characteristics. But, as they say, why pay more if the coloring of the slate can be easily done by hand? The main thing is to know how to do it and how to do it correctly.
How to paint the roof slate: materials
In most cases, acrylic or enamel is used for painting slate. These are special paints designed exclusively for slate. They are able not only to give this roofing material any shade, but also to strengthen it, reliably sealing every pore and microcrack formed during operation. What exactly to choose for painting slate? Enamel or acrylic paint? By and large, both options perfectly cope with the tasks assigned to them - both acrylic compounds and enamel form a thin protective film after drying on the slate surface, which is a reliable protection.
There is also a third option for solving the issue of slate painting - these are modern polymer compositions, which today can be called universal. They perfectly withstand almost any operating conditions - polymer paints work on a double principle. They are at the same time glue - they penetrate deeply into the pores and cracks of the slate and at the same time stick to its surface. In this way, a reliable coating is formed, which in its characteristics is not much inferior to the protective polymers used to protect the metal during the production of corrugated board or metal tile.
What paint to paint slate and application technology
Before starting to study the question of how to paint slate, the first thing to note is that it is best to apply paint to a new roofing - protection made from the very beginning is the best protection. In principle, paint can be applied to the old slate, but for this it will have to be thoroughly cleaned of all kinds of contamination, including moss and lichen growth. Moreover, the surface layer of the old slate must be cut off, as it is, as a rule, is the main problem in the process of painting the slate - this can be done with a metal brush or a soft roller cutter installed on the.
In general, painting slate with your own hands can be represented as the following sequence of actions.
In principle, painting slate is not difficult, and the most important thing here is to fully comply with the requirements of paint manufacturers. As a rule, the entire technology for applying a particular coloring composition can be found on its packaging.
And in conclusion of the topic, how and with what to paint the slate, I will say a few words about the manufacturers of such coloring compositions - there are a lot of them, and it is quite difficult to make a choice here. The only correct solution in such a situation would be to trust the manufacturer's reputation. VGT slate enamel has proven itself well in practice - it is a weather-resistant paint with antiseptic additives. Shikril acrylic paint is a good choice. Alternatively, you can use another paint - the main thing is not to buy too cheap and everything will be fine!