Repair of metal roofing with liquid rubber. Roof repair with liquid rubber

The modern construction industry does not stand still, offering users new and improved materials. Among the latest innovations in the field roofing materials The so-called liquid spray roofing stands out - modern material, allowing you to quickly and easily cover large areas of the roof and meet high tightness requirements.

Let's consider the features of this material and the possibility of its use in private construction.

In this article

Material characteristics

Liquid roofing is a very functional and practical material, representing the synthesis of bitumen and latex. It is ideal for repairs and restoration work on the roof. Due to its special ductility, it is often called liquid rubber.

The scope of application of this material is quite wide and is not limited only to roofing. It is used with great success in the repair of roads, tunnels, and for waterproofing various containers (swimming pools, fountains, etc.). One of the distinctive qualities of the coating is the ability to use it on any surface: metal, slate, wood, stone.

Liquid rubber is stored and supplied in separate hermetically sealed barrels. To apply this material to the surface, special equipment is required. For example, this could be a mobile application unit liquid roofing, which applies the substance - cold emulsion - thin layer. Such a roof not only protects the building from precipitation, but is also safe in terms of fire - it is difficult to ignite. Liquid rubber can be used in roofing in any climatic conditions.

If liquid rubber is applied to concrete or brick, it is firmly fixed to the corresponding surfaces. Thanks to this, it becomes possible to create high-quality and durable seams. At roofing works This material allows not only to strengthen the entire roof, but also to provide excellent sound insulation.

Thus, liquid rubber can be used to repair roofs covered with various roofing materials. The use of bitumen is possible both on flat and on pitched roofs: the material hardens almost instantly after application. Hardening of liquid rubber occurs without the release of toxic vapors, since the material is based on water.

Advantages

The advantages include:

Resistant to temperature changes and sun exposure;
Resistance to various aggressive natural factors (wind, snow, rain, hail, etc.);
High fire safety;
Elasticity and absence of seams when spraying;
Resistance to mechanical damage;
Ease of operation and repair;
High waterproofing;
Long service life.

The advantages of this roof also include the possibility of installing it yourself: the material does not require special heating and is applied in a cold state.

Flaws

The only downside worth noting is, perhaps, the rather high cost. square meter similar roof. On average, it will cost from 800 rubles per sq. m. m.

Types of liquid rubber

There are several types of liquid rubber for roofing, which are divided according to two parameters. The first of them is in composition:

A one-component mass does not require preparatory work and is immediately applied to the surface. The consistency is a viscous mass of various colors;
The two-component mixture includes a base and a special curing composition and requires special preparation before application.

The material also differs in the method of its application to the surface:

Applied to the surface like paint using a brush or roller, it creates a viscous substance that fills all microcracks in the base;
When cold it is applied by spraying;
It is laid using the self-leveling method, similar to self-leveling floors.

All types of liquid roofing have important advantage Compared to other roofing materials, it has amazing elasticity and stretchability. A thin, about 2 mm, section of bitumen does not tear under the influence of external force, but stretches. It is this, as well as the seamless fabric, that ensures high level waterproofing of this material.

Roofing process

The do-it-yourself roof treatment plan comes down to the following action plan:

First of all, it is necessary to calculate the area of the roof being treated. Based on these data, the required amount of waterproofing for the roof is calculated. As a rule, 1 kg of cold material is used to process 4 square meters. m of roofing, taking into account the application of two layers. It would not be superfluous to add 10% not unforeseen cases to the result obtained.
It is recommended to purchase liquid bitumen for roofing at specialized sales points, where the material will have all Required documents, and competent consultants will help with valuable advice.
Before applying the material to the roof, it is cleaned of dust and debris. Can be applied to a damp surface, however best result You still need to dry the roof. Application of liquid bitumen does not require the removal of the old roofing; the material fits perfectly on metal, wood, tiles, concrete or brick.
Applying the material using one of the methods presented below, depending on the availability of special equipment, or on your own.
Checking the tightness of the material.
Finishing work on the roof. Liquid rubber can be painted with any paints on water based, which will allow you to do new roof attractive and in harmony with the rest of the building.

Application options

Liquid roofing does not require special surface preparation before application: just clean the area of debris and dust. Let's consider different ways applying this material to the roof.

Sputtering

The most desirable method of application is the spraying method, as it has a number of undeniable advantages over other methods:

Allows you to easily apply the material to all bends, junctions and complex geometric shapes roofs;
Significantly saves material and application time.

For spraying, a special spraying device with a gasoline engine is used, which, due to its relatively low weight (up to 70 kg) and mobility, allows you to quickly treat large areas of the roofing surface: up to 2 thousand square meters. meters per day. This method is the main one in industrial construction, as it allows maximum savings process the material maximum amount roof space at high speed.

Application by painting

In private construction, where it is often not possible or necessary to use special equipment, application is possible by painting using rollers or brushes.

In this case, the roof made of liquid rubber is thicker than in the case of spraying. On the one hand, this significantly increases the material consumption (from 2-3 times), but, on the other hand, it gives a thicker and, accordingly, more durable roofing covering.

Considering the relatively small scale of the roofs of private houses and buildings, this application method has a right to exist and is very popular among craftsmen who are accustomed to doing repairs with their own hands.

Liquid rubber for the roof is manually applied in several layers with a thickness of each layer of 3-4 mm. Allow at least 15 minutes between coats to allow the previous coat to dry and harden. It is important to ensure the evenness of the coating, using a spatula if necessary.

Bulk method

This method is similar to the previous one, with the difference that it allows the installation process to be carried out much faster. Liquid rubber is poured into the center of the surface to be treated and quickly leveled with rollers or spatulas.

In this case, it will be much more difficult to control the thickness of the layer, since due to rapid drying, all work will have to be done quickly.

conclusions

Liquid rubber is a fairly convenient material to use, combining high quality and operational advantages with the ability quick installation on your own. It is applied whole pieces and without seams, so water does not leak through it in case of bad weather.

The ease of installation and unpretentiousness of the material make it an attractive coating both for roofs of any type and for repairing existing roofs.

Taking into account everything described above, we can confidently say that liquid rubber is a revolutionary construction material, which is perfect for complex roofing work.

Soft roofing has a multi-layer structure and is made from flexible roofing materials. Thanks to its advantages, it has rightfully taken a leading position among other types of roofs. However, along with all its advantages, it also has a lot of negative sides. Defects quite often form on soft roofs, the cause of which can be both physical influences and environment. To eliminate them, use special materials for repair soft roof. Most often, repairmen use liquid rubber, mastic or waterproofing.

First of all, you need to determine the condition of the coating. After all, how damaged it is depends on what repairs will be. And depending on the type of repair, the choice of materials will depend. In this regard, the first point is to determine the type of repair needed, which can be:

The first type is also called current. If there is minor damage to the coating that cannot lead to serious (global) consequences, then after a preliminary inspection, Maintenance. In this case, complete dismantling of the old coating is not carried out. Everything is limited to simply correcting deformations with liquid rubber. Bituminous mastic is also often used for such repairs.

Important! Major repairs are carried out in cases where the damage is sufficiently extensive and can lead to serious consequences. IN Lately The waterproofing repair method has proven itself well.

Liquid rubber - as one of the materials for coating restoration

This material are increasingly used during renovation work. Liquid rubber creates completely seamless coating, which does not allow water to pass through. It can be used both for sealing small gaps, cracks, and other damage, and for a solid coating.

When repairing with liquid rubber, you should remember its composition. The basis of this material is a bitumen-latex emulsion, sprayed with calcium chloride powder. The advantages of this type of material are:

In some cases it can be applied without removing the old coating.
Work is carried out without using complex mechanisms and technology.
Has enough big choice color range.
The service life can reach 20 years.
Provides a high level of waterproofing.
Fast hardening.

Main aspects of the technology that uses liquid rubber

Elimination of deformations is carried out in the following ways:

mechanical spraying of liquid rubber is carried out using airless devices;
The material is applied manually using conventional rollers or a brush.

When using mechanical method The time spent on work is significantly reduced. This reduces consumption. Compared to it, the manual method is longer. With it you need to apply rubber in layers. Each layer must dry for at least 7 minutes. Naturally, the speed of application with a roller or brush is significantly lower than with mechanical spraying.

Repairing with liquid rubber has many advantages. First of all, it does not need to be heated or prepared in any way. The only thing that is necessary is to clear the roof of debris. Secondly, it is extremely elastic and very durable. In this regard, restoration work using liquid rubber is gaining increasing popularity. Coating a flat roof with liquid rubber https://www.youtube.com/watch?v=iNCZQYehhG8

Mastic and its features

Mastic can be applied in two states: cold and hot. The application temperature depends on which type was chosen. For cold application, mastic containing a special solvent is suitable. Hot type do not contain this component.

Depending on what chemical composition, this material is divided into:

bitumen (most commonly used);
polymer;
latex;
combined.

But regardless of this, any of them has a number of advantages:

This material is resistant to both external influences environment (precipitation, etc.) and mechanical damage.
It is very flexible;
Quite easy to use.
It is light in weight, which is also important.

What you need to know about mastic https://www.youtube.com/watch?v=5E4PuZKf6AU

Elimination of deformations using bitumen mastic

Mastic is the most common material that is used not only to eliminate cracks or other defects. Hot mastic is applied a year after laying the roofing material. Lubricating performs protective functions. To eliminate a defect (for example, bloating), the following technology is used:

First of all, cleaning needs to be done. All debris that has accumulated around the damage must be removed.
Next, the edges of the swelling need to be lifted, cut, and also cleaned using a tool (for example, a knife).
The mastic is preheated. After which the defect site is lubricated with it.
The mastic is secured on top with a special reinforcing lining.
In cases where the damage is large enough in area, then not an overlay is laid on top, but a patch made of roofing felt. According to the regulations, it must overlap by at least 10 cm.

Cracks near walls and ceilings are treated in the same way as regular swellings. The only difference is the size of the patch. In this case, the mastic is secured with a patch bigger size. Flat roof repair bitumen mastic https://www.youtube.com/watch?v=anf-LBGJydU

Waterproofing agent for major restoration of waterproofing coating

This material, unlike liquid rubber and mastic, is used more often for major renovation. With this type of work, it is necessary to completely dismantle the old waterproofing coating.

Hydroisol has the following structure:

1st layer – base;
a coating of modified bitumen is created on both sides of the base;
last one coming protective layer with slate powder.

Features of roof waterproofing https://www.youtube.com/watch?v=2_94FfG5cmY An example diagram looks like this:

To dismantle old layers, they resort to using a chisel, hammer, chisel, ax or pry bar. Using a sharp tool, make cuts, and then pry up the edges and remove the coating in pieces.
In this case, you need to pay attention to the “slope”. If inconsistencies are found during the inspection, they must be eliminated and corrected.
The cleaned base must be primed. To do this they resort to cement-sand screed. At the same time, you need to monitor correct slope in relation to the funnels carrying out the water flow. You need to make sure that they are not clogged. If there is debris in them, the flow of water will be disrupted and liquid will accumulate on the roof.
Using fusing technology, waterproofing is laid in 2 layers.

Repair various roofs using waterproofing https://www.youtube.com/watch?v=1t1dJC6vqhI Roof repair depends on several points. First of all, they take into account how badly the coating is damaged. If there are not many deformations and they are not large, then current renovation work, in which liquid rubber or mastic is used. For more serious damage, resort to waterproofing.

The product obtained as a result of the modification transformation of a bitumen-latex emulsion, the composition of which is characterized by resin-like substances and water incompatible with each other in dissolution, is called liquid rubber. The elastic lamellar mass is similar to the rubber coating: the same black, with increased ductility, waterproof. The last property is especially valuable. That is why the solution is also called sprayed seamless water insulation, a new perfect building material.

Areas of application

Liquid roof rubber has a wide range of applications:

Protection against moisture penetration of foundations ( groundwater), floors between floors; waterproofing of floors (prevents the appearance of fungus, mold), swimming pool tanks, metal and concrete tanks, roofing, etc.
On complex surfaces with different levels, “steps”. On figured architectural forms, at joints.
In areas where there is a high level of vibration (particularly near ventilation holes, etc.).

Liquid rubber is indispensable when there is no time for large-scale construction, waterproofing and roofing work: the composition can be applied to the prepared old coating. It should be noted: the seamless smooth multi-colored shell itself can serve decorative coating, as well as the basis for further laying piece materials on it.

Main types

Liquid rubber is qualified:

According to the number of included components: one-component (liquid multi-color mass that does not require preliminary preparation, completely ready for application); two-component (consists of a hardener and a base, requires preparation).
By method of application. Painting: the composition in liquid or paste form is applied with a brush, roller, creating a dense protective film, stopping all microcracks. Spraying: the surface is treated with a cold solution from a special installation at optimal speed. Bulk: a mixture of liquid rubber is prepared immediately before applying waterproofing protection.

Main advantages of the material

The main “plus” in favor of applying liquid rubber to the roof is a seamless layer, especially at the joints of surfaces of different levels. Besides, liquid composition fills the most small cracks and chips.

Interacts with any type of base, differs high degree adhesion. When working without heating the mixture ( cold method) is characterized by safety for humans. Doesn't have unpleasant odor. Environmentally safe: the composition contains water. The temperature “corridor” is quite wide: from -45°C to almost +100°C. Due to its high elasticity, liquid rubber is able to take any shape and respond to the expansion of an object without losing its qualities.

Please note! If desired, you can choose the composition of any color. However, pay close attention to the characteristics on the packaging, which indicate whether this type of mixture is indicated for use under UV rays, or sunlight has a destructive effect on such a surface. In this case, it is recommended to paint the waterproof shell on top with an opaque primer paint.

The coating is quickly applied and also dries quickly. Liquid roof rubber is characterized by high strength"to break". Even the thinnest fabric, about 2 mm, does not burst, but stretches different sides. It is not damaged by chemicals and resists shock loads.

Application methods: the right choice

Before performing work, you should decide which method to choose. It depends on technical capabilities, availability the necessary tool, mechanized means, the type of material itself.

Attention! If you are not confident that you can handle an airless spraying unit, then it is better to carry out this work manually. The mobile unit automatically mixes the components into one composition in specified proportions. The bitumen water-like polymer emulsion is sprayed in the form of a torch under a pressure of about 18 atmospheres by a slot-shaped nozzle. The calcium chloride solution acts as a catalyst and is supplied through another nozzle. At the point where the components are mixed, the bitumen emulsion immediately hardens on the surface being treated.

The mechanized method not only speeds up the process of applying liquid rubber for the roof, but also economically consumes the solution. In this case, the thickness of the coated layer depends on the type of roof. So, for a membrane surface it will be 2-3 mm, for metal and wood, 1.5 mm is enough. A concrete base will require more: from 3 mm.

Technologically, the waterproofing process can be divided into points:

taking measurements of the roof being treated;
performing a calculation required quantity liquid rubber;
purchasing certified quality waterproofing material at specialized points of sale;
preparatory work on the surface
applying liquid rubber using one of the methods;
checking the tightness of the layer; uniformity of application finishing works on the roof.

Quantity required: how much is this?

You need to purchase material in such a volume that, on the one hand, it is enough for the entire volume of work and you don’t have to run to buy the missing mixture in the midst of it; on the other hand, you don’t want to spend a lot of money on surplus items that won’t be useful. Based on the previously taken dimensions, having calculated the roof area, they are compared with the consumption data, which must be indicated on the packaging of the mixture by each manufacturer.

Important! If for some reason there are no flow parameters, they are guided by the following standards: for a cold type of hydraulic solution per 4 sq. m of roof area you need to use about 1 kg (this takes into account two-layer application). It is necessary to make an adjustment for losses of 10%. The end result will be normal.

Manual application technology

This method is used when it is not possible to rent or buy mechanized installations and for small volumes of work. Then you need to count on own strength, applying manually using a spatula, roller or brush. You immediately need to prepare yourself for the fact that the processing process requires some effort, time and patience. But it is not complicated and is accessible to everyone.

The surface to be treated can be brick or concrete. Membrane and metal bases are allowed.

In this case, liquid rubber is applied to the roof in the following order:

For work, choose a fine day, but not hot, with a temperature of at least 5°C.
Surface lead to the right type: all objects and debris on it are removed. Exfoliated layers are removed. If necessary, the base is repaired using cement-sand mixture, etc. If a restoration is being carried out on a roof that was originally covered with rubber waterproofing, then the damaged area is thoroughly cleaned with emery cloth, after which the compound is applied to this place and immediately leveled with the roof surface.
If there are oil stains or grease residues, it is better to remove them, thus ensuring better adhesion of the rubber to the base, and then rinse.
Dry well.
Prepare the tool: a roller or brush should have a wide base.
Successively, a cold solution 3-4 mm thick is carefully applied to each small area. With the hot method, the composition is first preheated in dosed portions to about 230°C, then naturally cooled slightly to 150-160°C and immediately applied in this form. This stage is also called priming. If during preparation there are areas left somewhere with contaminants in the form of dust, then priming completely frees the surface from them.
Layer-by-layer coating requires, after the formation of the first layer, to wait about 10-15 minutes until it sets with the base and the polymerization processes in the rubber itself are completed.
In the same way, apply the second, and if necessary, the third layer of solution. Wherein Special attention addresses areas of elevation changes, voids, chips and cracks. Using a spatula, the roof surface is leveled.
After waiting for the last layer to dry completely, you can begin further formation of the roof: applying the finishing coating.

Using a mechanical installation when applying liquid rubber

If manual method with a cold coating requires careful work and does not require speeding up the process, then hot waterproofing should be done at an accelerated pace so that it does not have time to harden. This requires a certain skill.

Properly prepare mobile equipment and check its completeness.
Place a container and pour in a solution of calcium chloride (CaCl2).
Fix both containers (with CaCl2 and liquid rubber) on the spraying unit.
Carrying out a uniform supply from both tanks, apply the finished solution 3-4 cm thick perpendicular to the treated area evenly, without gaps, onto the roof. Optimal distance, at which the spray nozzle should be located from the roof, is about 0.4 m. Convenient holder will allow you to apply the mixture to the most inconvenient places at high speed.

Polymerization processes under normal environmental conditions (temperature about 20-25 degrees and humidity 50%) are completely completed on the third day after treatment. After completion of the work, you get a durable monolith that will serve properly, performing its functions, for at least two decades.

Enough interesting material For roof waterproofing, petroleum bitumen is used, which is also popularly called liquid rubber. Many specialists know how universal this material is, and craftsmen without experience often underestimate roofing rubber. This type of waterproofing is used when installing a flat roof, repairing an old one covered with roofing felt, and also to protect the roof and foundation from water. Below we will tell you what liquid roof waterproofing consists of, what its properties are, and how it can be used.

What is included in rubber waterproofing?

Liquid rubber for roofing is used quite widely, and it is based on a bitumen emulsion. This material is a thick, viscous, fluid liquid, which, after hitting the roof surface, begins to solidify if the outside temperature is above 5 ºC. After the liquid rubber has completely hardened, a continuous, durable layer is obtained that prevents moisture from entering.

Among other things, liquid roof waterproofing includes:

Polymer additives. Necessary to give the material greater resistance to temperature changes and mechanical stress.
Plasticizers. Designed to give the bitumen composition increased fluidity and elasticity, as well as to increase adhesive properties.
Hardeners. They are added to the material to allow it to harden.

It is worth noting that this water-repellent agent has nothing in common with the usual real rubber, and it is called so because after hardening the material remains just as elastic and viscous.

Properties of moisture-repellent roofing rubber

Liquid rubber has a wide range of applications. It has a high level of water resistance, excellent elasticity, and this material is easy to apply with your own hands.

To the advantages rubber roofing can be attributed:

Integrity. After the material hardens, a monolithic moisture-repellent layer is formed on the base of the roof without joints and seams, which often cause leaks.
High adhesive properties. The mixture easily penetrates into the smallest cracks and pores wooden elements roofing structure, concrete foundations and even steel elements without priming.
Weather resistance. Liquid rubber can be applied to the roof at temperatures from -75 to 95 ºC - these indicators are more than enough for the normal operation of this material in all regions of the Russian Federation.
Ease of use. This moisture-repellent material can be used to cover vertical and horizontal structures. And to apply the composition you can use a brush, roller or spray gun.

Keep in mind that this material also has disadvantages - high cost and poor resistance to impact. ultraviolet radiation. To protect the roof from the sun after applying this moisture-repellent agent, the surfaces should be additionally covered with silicone or water-based paint.

For what purposes can it be used on the roof?

The range of uses of liquid rubber is quite wide. It is very different from other moisture-repellent products in its consistency, which allows it to be easily applied to any surface and cover narrow crevices, small depressions and joints.

Liquid rubber can be used for the following purposes:

For waterproofing flat roofs. Liquid rubber is distributed in an even layer over the entire base of the roof until a uniform layer of the desired height is formed. This technology is also called self-leveling roofing.
As a primer layer before installing rolled and piece roofing coverings.
When organizing protection for the foundation and other structural elements houses from water. Thanks to bitumen, the composition acquires antibacterial properties, so materials after its application remain intact longer and are less susceptible to corrosion and destruction.
For roof repairs using liquid rubber. It makes it easy to hide cracks, tears and holes; it can be used to install a patch on an old base covered with roofing felt.

According to many experts, the high cost of the material is more than compensated by its highest performance characteristics. In practice, it was ordered that a layer of liquid rubber of only 2 mm can replace an 8 mm layer of rolled waterproofing.

Technology for using liquid waterproofing for roofs

First of all, carefully prepare the surface. All dirt and dust are removed, after which the working surface is dried, primed with mastic and a reinforcing layer of geotextile is laid. After this, you can begin applying liquid rubber.

Apply liquid waterproofing can be done in one of the following ways:

Using a roller or brush. Such tools will allow you to treat the base with a thick layer. This method is usually used to cover horizontal surfaces.
Bulk method. If you plan to pour a large layer of waterproofing, the easiest way is to pour liquid rubber over all bases, and then level it using the rule.
Using a spray bottle. This tool is convenient for covering vertical surfaces, while the waterproofing layer is thin, so this method is considered economical.

It is worth noting that for best efficiency, liquid waterproofing should be applied not in one layer, but in 2 or 3. Each subsequent layer is applied after the previous one has completely hardened - after approximately 5-9 hours.