Painting the metal roof of the house. Do-it-yourself painting the roof of a house What is the best paint for an iron roof

Most old houses are covered with the most affordable material, which is slate. Its production made it possible to supply not only construction organizations, but also private developers. It is not surprising that the roofs of country houses were covered with this particular roofing material. But time spares nothing and asbestos-cement sheets gradually begin to lose their former light gray color, overgrown with moss and black spots. But such a design cannot suit a person who wants to make his home bright and memorable.

The slate roof of the house is painted in accordance with the design of the facade.

If the slate has lost its appeal

If the roofing itself does not require replacement, then it would be best to simply paint the slate. It is also worth updating asbestos-cement sheets with a paintwork material to increase the ability of the roof to resist water flows rushing from heaven during rain. But before you paint a slate roof, you should prepare the necessary tools and suitable paint.

Moss-covered slate roof of a house

Methods and materials for giving the roof a new life

To begin with, it is worth stocking up with the necessary equipment, without which the work simply cannot be completed. To do this, prepare:

1. ladder;
2. brushes or spray;
3. rope;
4. wire brush or portable electric washer.

No need to be surprised to have a portable electric washer on this list. The fact is that before painting the slate roof, it must be properly cleaned of dirt and other debris. This requirement applies to all types of paint and varnish materials, including rubber paint, which has often become used for roof restoration.

Cleaning the slate with water using a high-pressure apparatus

Cleaning the slate with your hands is a rather long and laborious process, so it will be much more effective to use a jet of water directed under pressure. The main thing is not to set too high an indicator, otherwise you can simply wash the hole in the asbestos-cement sheet.

From materials it is necessary to prepare:

• solvent for paint and primer;
• primer for slate;
• water repellent;
• paint for slate coating (rubber, alkyd or silicone).

Once everything is ready, you can begin such an interesting process as painting the roof of the house.

Carrying out slate roof painting

When the roof is cleaned of debris and dust, and all dust is washed off it, then the slate must be covered with a water repellent. This material will improve the water-repellent properties of the coating, which will positively affect the roof as a whole. But on the metal part, if any, this liquid should not be. You can cover the slate with a brush or spray. The main thing is that there are no untreated places left.

Treatment of slate with a water repellent by spraying

In addition, this liquid will somewhat strengthen the slate itself. This will not allow the roofing material to collapse under the influence of precipitation and wind. And these are the best qualities for any paint that will be used in the future, be it rubber or acrylic or even enamel.

When the water repellent dries, you should proceed to the surface primer. This stage will make the surface of the slate prepared for contact with the paintwork. And the durability of the whole work depends on the clutch. And in order not to get a new repair the next year, you should work well with the primer. When it is completely applied, it is necessary to allow the roof to dry. This may take up to 12 hours. And only after that it will be possible to decorate the roofing, giving it the desired color.

Painting the roof of the house is the final stage of the whole process. And it cannot be done carelessly. Like primer, roof paint can be applied by brush or spray. And the roller here will not be very convenient, since the surface of the slate has waves, which makes it difficult to work with this tool. The coating should be applied in two layers. This will give you the best quality results. The surface must dry properly between coats. This is a mandatory condition that must be met strictly.

For the speedy completion of work, it is customary to use acrylic paints, which are diluted with plain water and dry quickly enough. If necessary, up to 10% water can be added to this composition. This is required in very hot weather, when the temperature approaches +35 C. Water evaporates quickly, and thickened paint will not be able to give a high-quality coating.

Applying paint to a slate roof with a brush

The final coat should be evenly distributed, creating an even layer without color differences. The surface of the slate roof will be transformed for the better, which will most favorably affect its perception by others.

Rubber paint will allow you to get a velvety coating that can freely tolerate any temperature changes. It will not crack or peel off even on a metal base. And this is its significant advantage over other options for paints and varnishes for painting roofs.

Painted slate roof of a private house

The slate is painted, the surface is completely dry, but this is not the end of the work. It is required to process the skates and metal junctions so that they look beautiful and attractive. And the task may not be easy, since most of these elements are made of galvanized iron.

What can be done with old galvanizing

On an old metal surface coated with zinc, places can form over time where corrosion has begun to reach the black iron. The basis of this structural element under the influence of water and air is gradually destroyed. Corrosion literally "eats" the metal, which leads to the formation of a large number of holes. And there will be no talk of any tightness here.

Rubber paint for slate roofing and galvanized parts

Therefore, skates and junctions need protection. And this means that roofing paint on galvanized iron is needed, which will not only give an attractive appearance to these parts, but also strengthen them, extending their service life.

But not every paintwork material can be used for this job. On zinc, which is coated with iron, the resulting film does not hold well. This is due to poor adhesion of materials to the protective metal. Therefore, the choice should proceed from the properties of the given surface.

Painted slate roof and galvanized elements

And here rubber paint can also be used, which has already been used to transform a slate roof. It can be freely attached to the galvanized surface, which only needs to be cleaned of dirt and dust. You can apply this material over rust, but it is better to remove the metal oxide to get a more suitable base.

Works on coloring galvanized iron are carried out in two stages. After preparing the metal surface, which must be clean and free from oil and grease stains, the first coat must be applied. It is worth noting that rubber paint dries fairly quickly, which ensures maximum speed of work. In just a couple of hours, you can apply a second layer, which will make the galvanization attractive and updated.

Separately, it is necessary to say about security measures. Protective equipment such as gloves and goggles should be used when working. Painting at a height should only be carried out with insurance, so that in the event of a fall, a person can linger on the roof and avoid negative consequences.

Metal roofs have become quite widespread due to a number of advantages: reliability, ease of installation, affordable cost and attractive appearance. But often the surface requires additional protection against corrosion, and then the question of how to paint the iron roof becomes very, very relevant. We will look at how to choose the optimal paint and ensure the highest quality of work.

Features of the choice of paint

Consideration of the question of how to paint an iron roof should begin with determining the type of base that needs to be processed. This is what affects the choice of a particular option, so we will pay special attention to this factor.

Black metal

This group includes all metal roofing sheets on which no protective coating has been applied. That is, the surface is pure metal, but it is not protected by anything and rusts very quickly. Such a roof must be painted without fail, because it is better to process pure metal than to paint a rusty roof in a year, while spending much more effort and money.

The main compositions used in this case:

• Oil paint- a very old option that had no alternatives before, and to which many are accustomed. But such a coating does not provide proper durability: the roof looks great, but after a year cracks appear on the surface, and the color begins to fade. All this is due to the low elasticity of the material, and if you choose it, be prepared to repeat the staining at least once every two years.
• Alkyd compounds- Another traditional option, its price is slightly higher than that of oil paints, but the quality of the cover is much better. This group of compositions is distinguished by a rich color gamut, but due to poor resistance to ultraviolet radiation, staining will also have to be repeated every 2-3 years. The coating is also not sufficiently elastic, which reduces its reliability during sudden changes in temperature.
• Acrylic compositions appeared relatively recently, but gained the widest popularity among developers due to a number of advantages: it contains anti-corrosion additives, which significantly improves the protective properties of the coating, the surface is resistant to ultraviolet radiation, which ensures high durability. once every 10 years, which is why it is chosen by those who work with their own hands and do not want to repeat painting too often.

• Zinga conductive paint is a very interesting solution, because this composition is an analogue of cold galvanizing and consists of 96% zinc. The instructions for its use are simple, but the result is a coating that is almost as good as factory galvanized, which is resistant to almost any adverse weather conditions: from the scorching sun to sudden changes in temperature.

galvanized sheet

This is one of the most popular and sought-after options when it comes to metal roofing. And this is no accident - galvanizing makes steel resistant to moisture, but the layer is very thin, and it is not surprising that over time it no longer protects the metal, and corrosion processes begin. That is why staining is necessary, it will not only protect the roof, but also make it much more attractive.

Advice! Experts came to the conclusion that natural aging is the best way to prepare: the roof is left for a year after installation, moisture removes chemical reagents left after processing, and rain cleans the surface. It is enough to wash the roof with an alkaline solution, and you can start painting.

From paints, oil compositions, acrylic paints and compositions can be used, in addition, there are special LCIs that should be considered separately:

• Fire-retardant paints for metal Polistil are perfect for protecting the surface from the adverse effects of the atmosphere and will serve as a barrier from the effects of fire. This is especially important if the roof has many chimneys and ventilation shafts. But the cost of this option is quite high, and it is most often unjustified to use it on the roof.
• If you are faced with the question of how to paint an old iron roof, when the zinc layer has practically disappeared and the surface is covered with the so-called white rust - a powdery coating, then it is best to choose an alkyd-urethane paint. It will not only reliably protect the surface, but also prevent the further spread of corrosion.

Note! Such paint has the highest performance properties, but its cost is quite high.

Important! Never use alkyd compounds on galvanized surfaces. The alkaline reaction will oxidize the composition, it will peel off the surface, and you will have to do all the work again.

Important Notes

The choice of a quality composition does not guarantee an excellent result.

It is important to remember the following nuances:

• The surface must be cleaned of oxides and contaminants. If you are preparing galvanizing, do not be too zealous, along with pollution, you can also remove the zinc layer.
• Before painting, the surface should be washed with an alkaline solution.
• Processing should be carried out from top to bottom, it is optimal to apply 2-3 layers.
• Remember that acrylic compounds gain strength within a few weeks, so it is not recommended to move on the surface during this period.

Conclusion

In fact, choosing the right option is quite simple, it is important to take into account all the features of the roof and not save on quality, otherwise the work will have to be done again ().

The video in this article will help you better understand some of the issues discussed in this topic.

The painting of the roof itself, of course, can do a good job, because the layer of paint will protect the roofing material in the future, whether it be slate or covered with galvanized steel, it will also give the building a complete aesthetic look. This material will serve quite well and for a long time, the paint will prevent the development of corrosion on the surface of our roofing.

We must always remember that the painting of the roof of the house should be carried out in accordance with the weather conditions. Before you ask yourself the question: how to paint the roof of a building, ask yourself when is the best time to do it. Experts always recommend not to start painting the roof in extreme heat, because this will have a very bad effect on the painting process in the future. During rain or damp weather, as you understand, it is not recommended to paint the roof.

A good time to paint roofing is first of all in spring (either April or May) or it is recommended to paint in autumn (September or October). Dry weather during these periods will be the key to a more durable service life of the applied painting, the task of which is not only to transform the roof, but also to protect the material from external influences.

Roof painting safety

Make sure that during our painting work on the roof you are not only comfortable, but also not dangerous. To do this, choose shoes with rubber soles, no matter what kind of shoes with soft soles that cannot scratch the surface of the material can be a good candidate. But it shouldn't be too slippery for your own benefit. Wrap yourself around your waist with a strong rope, thus organizing insurance. Tie the other end of the rope to the supports. Do not rely on the apparent strength of the chimney at first glance: it may not support a significant weight. Now you can safely proceed to the preliminary work.

At first glance, such a simple and quick process of coating the roof with paint requires painstaking and thorough preparation of the entire surface. First of all, the preparatory treatment of the roof covering will ensure a firm fit of the paint layer, and hence its reliability and durability. First you need to try to remove all the dirt and dust from the surface of our roof. It will also allow you to see all the shortcomings that need to be addressed.

If you see rust, then it must be cleaned in places warped by corrosion with a steel brush. After cleaning, we treat the areas with a special primer specially designed for metal.

If you find small holes and holes on the roof surface, then you can use a putty consisting of drying oil and chalk. A little trick - if you add a little paint to the drying oil, which the roof will then be painted with, then the treated areas will practically not stand out anywhere, neither on the slopes nor on the ridge.

In the case of large holes, patching work needs to be done. You can use a tarpaulin, for this, the dry material must be cut into pieces of the required size, soaked with a minium composition (metal, lead) on drying oil, which has the consistency of sour cream. 10 minutes after applying the composition, the patches are squeezed out, applied to the roof surface and smoothed out. In a situation with the creation of similar patches, it should be remembered that we start painting work only a week after the repair.

It is also necessary to pay attention to the elements of the drainage system: the pipes must be removed, cleaned and painted the inner surface. Only after all this, the pipes can be installed in place.

Using a brush, a primer prepared in advance is applied to the roof surface itself, which is a mixture of drying oil with thickened paint.

Especially for those who are interested in how to paint the roof in this way, so that it is very protected from corrosion, one very important piece of advice must be given. All the same iron sheets are facing the attic, and as a result, they require the same protection as the roofing materials outside. Without applying paint to the crate itself, paint the iron sheets in the attic with a paint brush.

Having chosen the coloring composition you need for zinc-coated sheets, always remember that the entire painting of the roof of the house from beginning to end should take place in several stages. If the materials on the roof are new, then they should be covered with paint in 2-3 passes. Usually 1-2 layers are enough for a roof. Between the application of layers, you need to make a short break of 5-7 days. The first painting is applied with a more watery paint composition.

While painting, stir the paint from time to time to keep it uniform. It is not recommended to use specially designed rollers for painting the roof, they can become a prerequisite for the formation of an uneven layer of paint on the surface of the entire roof. This will become a prerequisite for the further formation of cracks later. Ideally, for such painting work, a fly brush with fairly stiff bristles can fit. With a fly brush, we apply the coloring composition to the slopes of the roof. After the slopes have dried, you can already paint the entire remaining roof. It is necessary to move from the skates to the slopes.

If the steel needs anti-corrosion protection, then the slate needs to be painted, based on aesthetic considerations first. Boring gray slate is unlikely to be able to properly complement the overall color and life-affirming composition of the building. But when choosing a coloring composition, it is necessary to pay attention to the base; acrylic-based paint is often used for slate. Each owner of the house can decide on the color without outside help, but there are general tips: they usually use dark tones of colors so that moss and debris that appear from time to time are not so noticeable on the surface.

The slate roof is usually painted with a stiff-bristled fly brush. The roller in this case is absolutely not comfortable. Thanks to the brush, the surface of the entire roof will be stained moderately.

It is best to carry out painting work before installing the material on the roof. It is even easier to paint slate that is laid out on the ground than one that is already installed on the roof. Before painting, the entire surface of the material is primed. You can use paint in different colors. With the successful assembly of multi-colored sheets during installation, a very unique image of the house comes out.

Roofs made of such popular materials as metal, metal tiles and slate need periodic painting. This procedure simultaneously solves several important tasks: it improves the appearance of the roof, prevents corrosion, and also prolongs the service life. Properly selected roof paint will help avoid replacing this important part of the house, which is a much more costly and troublesome procedure.

When choosing a roof paint, there are several important parameters to consider, including:

• color spectrum;
• type and composition;
• pronounced anti-corrosion properties;
• resistance to aggressive environmental influences;
• resistance to temperature changes.

Effective painting of the roof of the house can be carried out using the following types of paint:

• acrylic;
• oil;
• special paints and varnishes containing components to combat corrosion.

All these types of paints are applicable for refining metal roofs, as well as those finished with metal tiles.

An important preliminary stage is the preparation of the roof for painting.

Before you start painting an iron roof, you must properly prepare it. To do this, work is being done to eliminate pollution, an outdated paintwork, as well as manifestations of corrosion, if any.

The process of cleaning a metal roof from the above-mentioned defects consists of several successive stages:

• processing with a special brush with a hard bristle;
• soft brushing;
• washing the entire area of ​​the roof;
• thorough drying.

If there are cracks and holes on the roof surface, it is recommended to process them with a soldering iron.

Particular attention should be paid to areas affected by corrosion. They need to be thoroughly treated with a special tool, and then immediately apply paint.

Paints for metal roofing

High quality paints and varnishes intended for painting metal roofs are present in the assortment of many popular foreign and domestic brands. Paints such as Tsikrol, Tikkurila, Hammerite, Silver, Unicom and others have proven themselves very well. Many of them are distinguished by refractory and anti-corrosion properties.

A universal option is, which is used for painting galvanized metal, slate roofs, as well as metal roofs. Due to good hiding power and high degree of adhesion, this paint does not peel off at all. It contains high-quality pigments, and therefore the original rich color is preserved for a long time. The main advantages of rubber paints are:

• elasticity;
• anti-slip properties;
• dirt and water-repellent properties;
• safety due to the absence of harmful components in the composition;
• good wear resistance.

How to paint a metal roof

If the goal of your search is high-quality paint for metal tiles, pay attention to those presented in spray cans, which are very convenient to use.

There are three types of such paints, the properties of which differ from each other:

• ordinary, designed to give the desired color;
• two-component, simultaneously acting as a primer and paint;
• three-component, consisting of a special rust converter, a primer and the paint itself.

In some cases, it makes sense to use heat-resistant spray paints for roofs, which are based on special organosilicon compounds.

It is convenient to use paints in spray cans if it is necessary to partially update the paintwork of metal tiles.

Paints for black metal roofs

One of the most common roofing materials is ferrous metal.

To effectively paint such a metal roof, it is recommended to use paints that are characterized by increased elasticity, as well as the presence of special anti-corrosion additives. Such properties are possessed by rubber and acrylic paints and varnishes. It is advisable to avoid oil and alkyd paints, as they are more susceptible to delamination and corrosion damage during operation - this is due to the low level of elasticity.

Features of staining slate coating

For many years, slate has been used as a roofing material. By itself, such a coating is gray and nondescript, but a successful painting can completely transform it.

The advantages of slate are its frost resistance and resistance to temperature extremes, minimal thermal conductivity, water resistance, and resistance to flames. But he also has a serious drawback: over time, this material begins to become covered with asbestos dust, which is dangerous to humans when inhaled. In addition, microscopic cracks form on its surface, and on the north side there is also a layer of green moss. All these troubles can be prevented by timely painting with quality materials.

Currently, there are three main typesused on the roof:

• quick-drying slate enamel;
• water-dispersion or acrylic paint;
• liquid plastic.

Special slate enamel is able to create a perfectly smooth and durable coating. It contains high-quality pigments that are not exposed to ultraviolet rays.

Acrylic paints do not allow water to penetrate into microcracks on the surface of the slate. In addition, with such a coating, water and snow come off the roof more easily and quickly, which, in turn, minimizes the load.

The third option for slate roofs is liquid plastic, which is a synthetic product based on polystyrene or vinyl chloride. Due to its toxicity, this material is not used for residential buildings.

The modern paint and varnish market offers many options with which you can update the appearance of roofs of various types: from iron to slate. It is very important that the properties of the paint are fully consistent with the type and characteristics of the roof.

To protect the roof from the harmful effects of sunlight, precipitation and corrosion, you need to know how metal roofs are painted. This measure will significantly extend the life of the roof. Not every paint and varnish composition is suitable for these purposes. Before you start painting, it is worth considering all the steps and tips that will be given below.

Selection of paint for metal roofing

Before purchasing a paintwork composition, you need to take into account its properties that are suitable specifically for working on a metal roof. These properties include: a high degree of moisture resistance, resistance to corrosion. In addition, the paint must be as flexible as possible, so that when the roof is heated, it can easily expand and not crack.

It is customary to paint the roof of galvanized material with oil or alkyd paints.

But for an iron roof, these types of paint are not suitable, since they do not have sufficient elasticity after drying. It is also worth abandoning water-dispersion paints, since they contain water, which will gradually cause metal corrosion.

To avoid the above problems, only special industrial paints containing corrosion inhibitors should be used for metal roofs.

It is worth paying attention to acrylic paints for metal, which do not need a primer and will last long enough, the only downside is the high price. If you purchase a corrugated sheet of galvanized or black iron and process it with acrylic enamel, then in the end you can get an analogue of a metal tile.

For metal roofs, it is better to choose a paint that will contain anti-corrosion active additives. A similar substance will protect the aluminum, galvanized and steel surface of the roofs. This type of paint can be used not only for roofing, it is treated with drainpipes, gutters and other metal structures.

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Stages of preparing a metal roof for painting

1. If the roof was previously painted, the old coating must be removed, dirt and rusty elements are removed. Old paint is easily removed with special chemical washes. To destroy rust, you can use an iron brush or a more modern way - a rust converter, which is applied with a brush to a degreased surface. You need to work with this composition with gloves and special glasses. It is worth remembering that, after processing the roof surface with a converter, painting is possible only on the fifth day. So much time is needed for the composition to completely dry.
2. After the outer surface is cleaned, you need to inspect the roof from the side of the attic, due to the accumulation of condensate, rust can also form there, which must be removed. If the metal is severely damaged by corrosion, it is better to use primer materials.
3. And the last preparatory stage is the calculation of the required amount of coloring material. To do this, you need to measure the roof, or rather its surface, and calculate the area. Paint consumption is often indicated in the instructions for it, so it will not be difficult to carry out calculations.

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Materials needed for painting the roof

To paint an iron roof, you need to have the following tools on hand:

• roller;
• pneumatic atomizer;
• brushes;
• scaffolding or ladder;
• sandpaper;
• brush for removing rust with metal teeth;
• a brush to remove dirt with artificial bristles;
• paint mixer.

When choosing a paint brush, it is better to give preference to a tool with hard bristles, it is suitable for working with a large area. In this case, the diameter of the brush should be about 6 cm. Brushes made from horsehair, although short-lived, are well suited for painting small details and removing stains.

A paint roller is also good for painting roofs. It is better to purchase a roller with a collapsible design, this will make it possible to change the length of the handle and the coloring part.

A handheld spray gun is a fairly handy device for painting large surfaces. If you don’t want to buy this tool, you can take a regular household vacuum cleaner with a spray mode and a nozzle.

You need to carefully consider the choice of shoes, it is better if the soles are felt, they will not slip and will not destroy the applied paint layer.