Cold application bitumen mastic – the main points you didn’t know about. Selection of mastic for roof waterproofing Waterproofing mastic for roofing
The roof is the main element of any structure, protecting its interior from rain, wind, snow and other atmospheric phenomena. And above all, it is from precipitation. That is why it is important to pay as much attention as possible to the reliability of this part of the building and, in particular, its waterproofing. To prevent leaks when creating a new roof or to eliminate them when repairing an old one, bitumen roof mastic is often used - an inexpensive, easy-to-use, but reliable product.
Bitumen mastic is quite plastic construction composition, which is based on bitumen and various additives that give the material certain properties. The substance has high waterproofing values, hardens in a short time after application, and comes in various types. And it is quite possible to use it independently, without resorting to help experienced craftsmen. The consistency is quite thick, when heated it becomes liquid.
Various additives and fillers present in a particular type of mastic give the substance a certain degree of viscosity, hardening speed, resistance to temperature, etc. As a rule, both mineral components and organic substances can be used as additives. Make it more dense and resistant to low temperatures mastic will help mineral wool, combined ash, asbestos dust, limestone. But components such as chalk or peat chips, used to make the composition thicker, will make application of the substance more convenient and faster, reduce consumption, and the thermal insulation of the bitumen layer will increase. Fiber fillers reinforce the material, and polymers will help improve waterproofing qualities.
After spreading over the surface of the base, the mastic hardens - a kind of membrane or film is formed on it without joints or seams. You can also use mastic to glue various materials.
On a note! The base on which the mastic will be applied does not require special preparation - the substance adheres perfectly even to rusty surfaces. However, builders still recommend carrying out certain preparatory work.
Advantages and disadvantages
It’s not for nothing that mastic is popular among experienced builders, and those who simply carry out any roofing repair work. She has a lot of advantages:
- high waterproofing rates;
- the ability to hide minor defects and level the surface;
- resistance to the formation of colonies of living microorganisms, mold, etc. on the surface of the bitumen layer;
- perfect adhesive properties to any surface - the material does not peel off or swell over time;
- high elasticity and no tendency to crack.
On a note! Having such an impressive set of advantages, mastic is also cheap. This means that repairs or waterproofing work on the roof can be made as cheap as possible.
But the material also has its disadvantages. For example, you cannot use mastic under certain weather conditions (in the rain), and it is sometimes quite difficult to control the thickness of the applied layer - uneven surfaces can increase material consumption, which increases the cost of work.
Bitumen mastics can be used for various works V construction industry. For example, one of the main areas of use is waterproofing floors, foundations, pipelines, installing parquet floors, swimming pools, etc. Mastic is also used for treating wood buried in the ground, concrete products. You can even lay linoleum using this product. Of course, it is also used for waterproofing and repair roofing works.
Functionality of mastic in relation to roofing
Mastic can be used for various roofing works and on any surfaces. It is often used on slopes and domed roofs, used for finishing spiers, also applicable on flat roofs Oh. The best option uses - waterproofing work, coating with roll materials, repair of certain types of roofing.
On a note! In some cases, you can use mastic without even removing the old roofing covering.
Bitumen mastic It perfectly seals seams and the surface itself, and, due to its high elasticity, reliably protects the roof from leaks. It is also suitable for sealing chimneys, ventilation and drainage ducts. Moreover, the roof can be made from absolutely any materials, be it tiles, concrete, roofing felt, etc. Bitumen mastic is used almost everywhere, from eliminating defects in roofing coverings to sealing joints and seams.
On a note! Bitumen mastic in construction and roofing can be used not only as a waterproofing and sealing material, but also as an adhesive composition.
Types of mastics
There are a large number of different types of mastics that can be classified depending on the type, method and purpose of use, application technique, composition, etc. For example, two main categories existing materials – hot and cold mastics. They differ in the method of application. In the first case, the substance must be heated to high temperatures and simply poured onto the prepared base, and then carefully leveled. In the second, the mastic is applied to certain areas using a spatula and has a thicker consistency.
When the solvent evaporates, the mastic becomes like rubber, which has physical, mechanical and hydrophobic properties
Hot mastic is characterized by increased elasticity, strength, lack of porosity and tendency to shrink. It can be used even at low temperature indicators air. The cold one is much easier to use, does not require heating, and has various options colors, which means it is easiest to use in cases where you need to make the sealing of seams invisible. And she is not afraid of exposure to ultraviolet radiation.
Also, all mastics can be divided into two main types according to the preparation method:
- one-component– mastics used without adding other components; they can be used immediately after opening the container. The main disadvantage is that you need to use up the entire composition at once;
- two-component– mastics that must be mixed with special thickeners before use.
Mastics may differ in composition. Depending on this parameter, there are:
- rubber-bitumen(it is made using fillers mineral type, petroleum bitumen, rubber crumbs, solvents and synthetic rubber. It is inherent high level adhesion, resistance to shock, temperature fluctuations);
- BKM-mastic(with rubber filler. Has high elasticity, does not tear, is used for gluing roofing felt);
- bitumen-polymer(based on modified latex, water-based bitumen emulsion. Contains no organic solvents. Can be used for interior and exterior work).
On a note! The most popular ready-made mastics are those produced under the Technonikol and Shinglas brands.
Table. Specifications bitumen mastic.
| Characteristic | Cold water-based mastic | Hot mastic | Solvent-based cold mastic |
|---|---|---|---|
| Layer thickness, mm | 1 | 2 | 1 |
| Air drying time (t = 20 degrees, humidity 50%) | 5 | 4 | 24 |
| Consumption, kg/sq.m. (1 layer) | 1,5 | 2-2,5 | 1-2 |
| Base humidity, no more than, % | 8 | 4 | 4 |
| Temperature, degrees | +5 - +40 | -10 - +40 | -10 - +40 |
Prices for bitumen mastic
Bitumen mastic
Consumption
The consumption of the product largely depends on what type of composition is used. For example, hot mastic does not “shrink” after drying, and the thickness of its layer does not change. In this case, the approximate consumption is 0.8-1 kg/m2. For creating waterproofing film you will have to spend approximately 2.5-3 kg/m2 if the final layer should be about 1 mm thick. Cold ones will need less - about 1.2-1.5 kg/m2.
Attention! If the mastic needs to be applied in several layers, then each subsequent one must be applied only after the previously applied one has dried.
It is also important to remember about such an aspect as dry residue. This is the name of the amount of substance that remains on the mastic-coated surface after the material has completely dried. The dry residue can affect the consumption of the product in one direction or another. Usually ready-made compositions have a dry residue in the range of 20-70%.
Roof repair using mastic
Step 1. The first step is to prepare the mastic or purchase ready mixture suitable type. It is important to mix the substance thoroughly, using and adding recommended solvents to the mixture if necessary.
Step 2. Next, you need to thoroughly clean the roof surface. Yes, it is believed that mastic can be applied to any surface, even a slightly cleaned one, but, nevertheless, the most quality work will only happen if the surface is first cleaned of debris and dirt. It is also important to remove pieces of deformed coating - it is better to cut them out and replace them with even patches.
Important! If the instructions for the mastic do not indicate that it can be used in a damp environment, then the roof should also be dried as much as possible beforehand.
Step 3. Roofing material intended for creating patches must be cut into pieces required sizes. Next, the mastic, using a regular metal spatula, needs to be applied to the wrong side of the prepared patch.
Step 4. It is also necessary to coat the very base of the roof in the area of the repaired area.
Step 6. Then you need to coat the edge of the patch surface with mastic, carefully covering all the joints and junctions of the patch with the roof surface. After this, it is recommended to sprinkle the patches with sand so that they do not overheat in the sun.
In this case, the work was carried out using cold mastic. In turn, hot must be applied heated and in several layers (2-3), using a brush. It is usually applied with a thickness of 1-3 mm in total. It is important to remember that when working with mastic, the weather should be dry and sunny - it is strictly not recommended to repair the roof during rain or at low temperatures (below -5 degrees).
Important! You need to work with hot mastic at a decent distance from any sources of fire - it is a flammable material.
Other rules for working with mastic
In order for the work to be of the highest quality, it is important to follow a number of rules.
Video - Roof repair using mastic
Simple roof leak repair
There are other compositions for repairing roofing surfaces, according to appearance reminiscent of conventional bitumen-based mastic. However, they are more liquid than cold mastic, and do not require strong heating before use. For example, the so-called “liquid roof”.
Step 1. The roofing surface must be thoroughly cleaned of vegetation and dirt. You can use brushes, spatulas and any available means.
Step 3. The prepared mixture can be poured onto the cleaned roof surface.
Step 4. Next, it must be evenly applied to the surface to be repaired, spreading with a wide spatula. If necessary, the amount of mixture can be increased. The thickness of the final layer should be 1-2 mm. You need to distribute the mixture starting from the ridge of the roof and moving towards its edge.
Bitumen mastic is a real “lifesaver” for those who want to quickly repair the roof and not be afraid that it will leak in the near future. In general, this universal product is applicable in almost any construction field, but this material is most often used for roofing, as well as for arranging the foundation.
The construction market today is overflowing with various repair compounds, sealants and rubber tapes that allow roof repairs. Such abundance cannot be called a negative factor - but it significantly complicates the process of choosing a suitable material. When small defects in the roof are discovered, an inexperienced craftsman finds himself on the market and is faced with the problem of choice. However, there is universal solution, time-tested - bitumen mastic. About what bitumen mastic for roofing is, how it differs from other materials and how to work with it, and we'll talk In this article.
The bituminous waterproofing mastic for roofing itself is a composition that includes one or two components. This material is ideal for waterproofing and roof repair. Bituminous mastics withstand moisture well, sun rays and various aggressive environments. In addition, all types of bitumen mastics are very elastic and can work at temperatures from -40 to +100 degrees.
Advantages of bitumen mastic
The most noticeable and important advantages of bitumen mastic include:
- Light weight of the material;
- Resistant to most aggressive chemical substances;
- Possibility of tinting;
- Easy to apply to areas requiring repair;
- High elasticity;
- High degree of viscosity, allowing the mastic to be used in most situations;
- Low cost;
- Cost-effective;
- Resistance to insolation;
- Excellent waterproofing properties, allowing the mastic to be used not only for repairs, but also for sealing any areas of the roof;
- Long term services;
- No seams after applying mastic;
- High tensile strength (mastics based on rubber or rubber have maximum strength values);
- Reliability and uniformity of material application to the surface;
- Possibility of application to any structure, regardless of the complexity of its configuration;
- Fire resistance, allowing mastics to withstand high temperatures.
One of the main advantages of bitumen mastic in relation to roof repair is its ability to stretch and shrink without any restrictions. The fact is that any flaw on the roof expands over time and leads to more serious problems. Most repair compounds that do not have the proper degree of elasticity crack during operation - but bitumen mastic does not have this drawback, since when tensile loads appear, it simply succumbs to them and completely covers the entire area of damage.
However, in order to be able to fully take advantage of this advantage, you need to be careful about the process of choosing mastic - poor quality material does not have the advantages described above.
Bituminous mastic for roof repair is selected depending on the following standards, which guarantee the high quality of the material:
- The composition must be homogeneous;
- Application to the damaged area should be easy and without any effort;
- A good bitumen mastic for roof repair must withstand temperatures of at least 70 degrees;
- High quality material does not have secretions that pose a danger to human health;
- Bitumen mastic suitable for repairs has a high adhesive ability;
- High-quality material does not allow moisture to pass through and is resistant to external factors.
Taking these indicators into account, you can select the optimal material.
Types of mastic for roof repair
There are many bitumen mastics, the classification of which, depending on the composition and features, is as follows:
- Cold mastic for roofing.
- Hot application mastic.
- Mastic on water based. This type of bitumen coating is the most environmentally friendly compared to analogues. Water-based mastics for repairs soft roof safe and very easy to apply.
- Mastic with additives and fillers. The standard composition of mastics can be supplemented with various plasticizers, minerals and other additives that allow you to change the final properties of the material. This is very convenient, so such materials can be called the most universal - one type of composition can be quite thick, another liquid, and a third very plastic. There are many options for mastics with additives, and the choice optimal material carried out depending on specific requirements.
- Rubber and polyurethane mastics. The main advantage of such materials is their high ductility. After applying rubber mastics, it appears protective film, capable of increasing its linear dimensions by 20 times without damage.
- Bitumen-latex mastics. This material belongs to the most modern mastics. The composition includes various synthetic substances and mineral additives. A distinctive feature of bitumen-latex mastics is maximum water resistance at the same level of mechanical strength.
- Mastics with oil solvent. Mastics containing an oil solvent do not harden over time. After their application, a hard film does not form, so the main area of use of such mastics is the treatment of roof elements that are constantly exposed to vibration. Otherwise, this mastic has all the same advantages as conventional compositions.
- Bitumen-rubber mastics. This option is considered the most “popular” - it is very often used in a variety of situations, from working on cars to repairing roofs. Bitumen-rubber mastics perfectly withstand dynamic loads and can be connected to surfaces made of any materials.
It’s worth talking about cold and hot mastic in more detail - they have some characteristic features.
Cold application mastic
This type of mastic is ready for use immediately after purchase. Mastic for repairing soft roofs using a cold method can be diluted with additional additives and used immediately - the diluted solution very quickly loses its properties, after which the mastic returns to its original properties.
One of the important advantages of cold-applied mastics is their ease of use and versatility - cold mastic for roof repairs is very quickly prepared and applied to most existing coatings. If necessary, such a composition can even be used for application on top of wet materials - and such situations arise, for example, when a roof leaks.
Certain types of cold mastics still need to be heated, but to a relatively low temperature - only 30-40 degrees Celsius.
Hot mastic
Before using hot bitumen mastic, it must be warmed up. Working temperature is about 150-180 degrees - the specific value depends on the type and characteristics of the material. When working with hot mastic, it is necessary to follow safety rules - only heated material can be applied to the surface, and it poses a certain health hazard.
Hot mastic for roof waterproofing is prepared as follows:
- First, a fire is built;
- You need to place one brick on both sides of the fire;
- A piece of bitumen is placed in an ordinary bucket, which is placed on the fire;
- Warming up bitumen must be constantly stirred, but carefully to avoid splashes;
- The heated material is applied to the damaged area of the roof as quickly as possible.
Ready-made mastic for sealing roofs can be supplemented with various additives and additives. For example, if the roof that requires repair is located at an angle, then a thickener must be added to the mastic, and for excessively thick material a solvent will be required.
Repair of soft roofing with bitumen mastic
In hot weather, a soft roof is subjected to serious stress, resulting in various defects such as swelling. The reason for the appearance of such defects is the presence of a certain amount of moisture in the soft roof, and when exposed to high temperatures, the structure begins to release water vapor. Because of this, the roof begins to swell, large bubbles appear on its surface and mastic leaks out.
Roof repair in this case consists of replacing damaged areas or repairing all damage. In the latter case, when repairing the roof with bitumen mastic, you can use one of two methods of applying the material - manual or mechanical. The choice is made depending on the amount of damage: small defects can be eliminated with a brush and spatula, and for repair large area you will need a sprayer.
There are the following methods for repairing soft roofs, which are selected depending on the damage:
- Patch. In case of minor damage, you can get by with a small patch. To apply it, you need to clear the damaged area, cover it with adhesive and place it on top metal mesh. The mesh, in turn, is also filled with bitumen mastic, due to which the entire patch is held in place.
- Repair of rotten areas. If the roofing material is small area rotten, then it needs to be cut out with a small margin. The resulting recess is cleaned, lubricated with mastic and sealed with rolled material with an overlap of about 15 cm over the entire area.
- Material coming off the roof or swelling. The sheet lagging behind the base is cut to apply mastic to the supporting elements of the roof. A patch is glued on top with a slight overlap relative to the cut. If the coating is swollen, then it will have to be cut crosswise, bent back, the base cleaned and dried, after which the bent elements are coated with bitumen mastic and glued into place. A patch must be placed on top of the restored coating.
A separate item is the elimination of cracks various sizes. Most often, such damage occurs when using roofing felt - it begins to crack without serving for even ten years. Of course, moisture gets under the cracks, and the entire roof structure can be seriously damaged because of this.
To restore the old roofing felt, you need to do the following:
- First, the coating is cleaned of various contaminants and sprinkles. To clean, you should use solar oil, and to remove the coating, use a steel brush or spatula.
- For the most problem areas patches are made and laid with a slight overlap. When using multiple patches, you need to lay them so that they partially overlap each other.
- The prepared base is covered with bitumen mastic.
- When some patches bulge, you need to get rid of this influence by pressing them heavy object or something similar.
- Excess bitumen for roof repair, squeezed out from under the patches, must be collected with a spatula.
When dealing with small cracks in a soft roof, you can get by with cutting them, removing dirt from underneath them, drying them and filling them with heated mastic. Optionally, for a better effect, you can cover such damage with patches.
Repair and waterproofing of hard roofing
Bitumen mastic can also be successfully used for repairing hard roofs. Most often it is used to repair and further protect damaged areas from corrosion. To repair, it is necessary to clean the surface affected by corrosion, remove the rust and sweep it away. After this, metal roofing mastic is applied to the area.
For greater efficiency when repairing rigid roofing materials, patches are impregnated with mastic. The pre-prepared patch is impregnated, placed in its place and covered with a layer of bitumen mastic. In addition, bitumen mastic is actively used for sealing various structures.
Conclusion
Bitumen mastic is excellent material for repair of soft and hard roofing coverings. This material is universal, so the use of bitumen mastic for roof waterproofing can be very diverse.
Using roofing mastic is one way to protect a flat roof from the elements. Unlike standard roll materials, mastics form a monolithic protective layer above the work surface.
It is especially convenient to work with flat roofs. Previously, they could only be insulated using roofing felt. The work is quite complex and time-consuming. Applying mastic is much easier, and the final result is no worse.
Features of the material
Roofing mastics are made from several components. The base is almost always bitumen. Bituminous roof mastic is now very popular.
The mastic itself is a viscous and liquid substance that is applied to a certain area of the roof. In most cases, roofing mastic is applied to the entire roof surface. Although, roof repairs with bitumen mastic are also very common and such work can be performed quite conveniently.
After all, you just need to apply the mastic to the surface and wait a certain time for it to dry.
Bitumen mastic for roofing dries within 24 hours. As a rule, it is applied in several layers. After finishing each layer, you need to wait before starting to work on the next one. After drying, a dense protective film 3-5 mm thick, sometimes more, is formed on the treated surface.
This film has a consistency similar to very dense rubber. It is difficult to damage it, and it does not react to water at all. It is not surprising that bitumen mastic for the roof of a garage, store or even a residential building is the best choice.
The only limitation on use is the level of roof slope. Equipment and repair of the roof with bitumen mastic is possible if its slope is no more than 25-30 degrees.
Bitumen mastic is suitable for roof waterproofing the best way. Sometimes it is used for conventional insulation devices. Although, a full protective coating of several layers of roofing mastic by default gives excellent protection from rain, snow and moisture.
But it is important to take care of the drainage equipment first.
Regular and waterproofing roofing mastic, of course, protects the house well from water ingress. But without proper drainage systems, moisture will gradually begin to accumulate on the surface of the roof and wash it away in several places. This will lead to increased wear of the protective coating.
This problem is especially relevant for flat roofs with a parapet.
Types of products
Roofing mastics are divided into several classes and types. Most often, attention is paid to the composition of bitumen mastic for roofing. However, its structure and main areas of work also play a role.
If we mean division by type of composition, then roofing mastics come in the following types:
- Bituminous;
- Bitumen-latex;
- Bitumen-polymer;
- Tar;
- Butyl rubber.
The features will depend on the composition. Bitumen- polymer mastics can be stored longer and they create durable protective coatings. Bitumen-latex roofing mastic is well suited for repairs. It is elastic, easy to use and dries quickly.
Rubber bitumen is used exclusively for insulation equipment and basic protective coatings. Tar and butyl rubber are used less frequently, but their properties are almost no different from standard roofing mastics.
Based on their structure, roofing and waterproofing mastics are divided into one-component and two-component.
One-component formulations are sold in almost finished form. All you need is to apply mastic to the surface. The drying process occurs due to the evaporation of the solvent contained in the composition.
Two-component mastics must be mixed immediately before starting work. As a rule, such compositions are distinguished by special characteristics.
For example, almost any bitumen roofing waterproofing mastic will be two-component, since it uses different materials that cannot be stored together for a long time.
Advantages and disadvantages
Roofing mastics have many advantages. It’s not for nothing that they are considered the most popular solution if you need to treat a flat roof:
- They do not react to moisture or any liquids.
- The price of bitumen roofing mastic will be very attractive when compared with alternative options roof finishing.
- They are easy to apply. You can get by with the simplest tools.
- The resulting coatings are not susceptible to the harmful effects of UV rays. It is also impossible to oxidize them.
- Corrosion of hardened mastic is not at all dangerous. It is more likely to collapse from old age.
- Roofing mastic forms a durable and elastic coating. And this is with a fairly moderate consumption of materials. Oddly enough, even a thickness of 3-5 mm is enough to perfectly protect the roof surface.
Remembering the advantages, we must not forget about the disadvantages of mastics. They have them, although not so numerous:
- The mastic must be applied in several layers. Experts do not recommend applying less than 3 layers per standard roof. In this case, a day or even more should pass after each application. This slightly delays the work process.
- They cannot be used on sloped surfaces.
- Roofing mastics can be used normally only if there is a working and properly designed drain.
- Such compositions cannot be applied if the temperature outside is sub-zero.
Review of popular manufacturers
Roofing mastics are created in huge quantities. It's difficult to single out just one out of dozens. various manufacturers. However, some representatives are still worth your attention:
- The undisputed leader in the production of mastics of any type is considered TechnoNIKOL brand. Without exaggeration, this manufacturer operates at a global level. TechnoNIKOL roofing mastic is produced in very large volumes. We can say that TechnoNIKOL controls the largest part of the market similar materials. This became possible thanks to the long process of forming production capacities.
- KrasKo company is a Moscow manufacturer that specializes in the production of mastics and paint and varnish materials. It is distinguished good quality products and fairly low prices. The main production facilities are aimed at producing mixtures with several components. One cannot miss the fact that roofing waterproofing mastic Hydrolon from the same manufacturer is consistently among the sales leaders.
- Trademark HydroLux specializes in creating water-repellent and waterproofing mastics for roofing. Their bitumen-polymer and butyl rubber compositions are especially popular. The quality of the products is at an acceptable level, but the prices are quite low. However, so is the consumption per 1 m 2.
- Another popular brand is mastic Tehron. Their production facilities are located in Dneprodzerzhinsk. When buying mastic from the Tegeron company, you cannot help but notice the rather modest packaging. But don't be fooled. Behind it lies very high quality and reliable material. And more importantly, very cheap. Mastics from this manufacturer are sold at the most low prices in your class.
How to choose?
Products are selected so that they fully meet your roofing requirements.
Manufacturers of bitumen-latex roofing mastic make it very elastic and fluid. This mastic is well suited for repairing damaged surfaces and waterproofing.
Manufacturers of bitumen-rubber roofing mastic act in a similar way. But rubber has special properties, so it is better to use it for full roof insulation and protection of specific structures.
Polymer mastic creates a durable coating that is comfortable to move on. It can be purchased if you want to create an accessible site with the possibility of visiting at any time.
Conventional bitumen or tar mastic is made from the simplest components. But the price of bitumen mastic for roofing is considered the lowest in its class. They are consumed more, and the final result cannot boast of serious advantages.
Such mastics are suitable for repairing and installing roofs in houses without much value.
One-component mastics are easier to use, so beginners are recommended to choose them. Two-component compositions are suitable for professionals who know how to use them and have the necessary tools.
Application and nuances of work
Apply mastic using a regular roller, brush or sprayer. It is better to apply one-component mixtures using a sprayer. This tool significantly speeds up work processes, but not every person has it available.
One-component mastics are immediately ready for use. They only need to be applied to the surface. Two-component products are pre-mixed in the proportions indicated on the package.
The surface itself must first be cleaned of dirt. It is advisable to repair holes, large cracks and other serious defects cement mortar. In some cases, a primer is applied to the surface.
Next comes the application process itself. The mastic is spread using the above tools. The entire surface needs to be treated. Each layer will have a thickness of 1-2 mm. Typically, three or more layers are applied to an unprotected roof.
The peculiarity of mastic is that it can be used on old coatings. For example, on an old roofing felt. Thus, it is possible to repair the old roof and strengthen it protective properties. The technology in this case is practically no different from the standard use of roofing mastics.
Separately, it is worth noting the ability to reinforce the mastic with a special mesh, as well as to repair roofing felt coatings by gluing new sheets. In this case, the mastic itself acts as an adhesive composition.
Application of material
Prices for materials and services
The price of roofing mastic depends on the manufacturer and the components used in it.
You can buy bitumen roofing mastic from the Tegeron company at a price of 1-3 dollars per 1 m 2. The price of bitumen-latex roofing mastic will be higher, since it uses special components. TechnoNIKOL bitumen-latex roofing mastic sells for $5-7 per 1 m2.
GidroLux waterproofing polymer mastics cost $4-5 per 1 m2. Krasko company products will cost you 2-4 dollars per 1 m 2.
For the roofing work itself you will have to pay from 3 dollars per 1 m 2 of roofing. This means applying the material in several layers. The price is quite high, which is not surprising - you have to work at heights.
Bitumen mastic for roof waterproofing is a multi-component bitumen material that is used to create a seamless waterproof coating for roof waterproofing. There are 2 types of roofing mastics produced - cold and hot application.
Consumption of bitumen roofing mastic
Bitumen mastic has such an indicator as consumption per m2, which depends on its composition. The more modifiers (substances that improve the quality and plasticity of the material) are added to the mastic, the lower its consumption per m2 of treated area. Mastic consumption varies from 0.4 to 4.0 kg per m2. Exact number The manufacturer indicates consumption on the packaging.
For gluing bitumen roofing materials, repairing a roof or installing a mastic roof, thicker bitumen mastic is used, usually hot applied, with a consumption of up to 3 kg per 1 m2. This page presents bitumen mastics from TechnoNikol and other manufacturers, from the simplest and most inexpensive to the latest innovative developments.
Properties of bitumen mastics for roofing
Bituminous mastic for roofing applications is made from high-quality bitumen, solvents, fillers and polymer additives. Each type of mastic has its own original recipe, which provides the specified properties for each specific brand of this material. But there is general properties, which all types of cold bitumen mastics possess, namely:
- excellent waterproofing characteristics
- good heat resistance
- elasticity after drying
- Full compatibility with other bituminous materials
The use of bitumen mastics for roof waterproofing
To carry out waterproofing work it is necessary:
- free the insulated surface from debris, dirt, dust, ice;
- treat with a primer for better adhesion of the base and mastic;
- stir the mastic thoroughly;
- apply in layers with a brush, roller, spatula or pouring method, followed by leveling using a special comb.
Hot-use bitumen mastics can be purchased:
- at one of our warehouse complexes in Moscow or the Moscow region;
- order delivery to the site from our warehouse or from the manufacturer;
- order a prefabricated machine with various types bituminous materials;
- order a wholesale supply.
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Today we’ll talk about something very interesting. building material, which replaced hot bitumen. This is bitumen mastic for roofing. It should be immediately noted that the classification of this material includes several positions. One of them is roofing. We offer you information about the technical and operational characteristics of the mastic, which will help you control the work of the craftsmen involved in covering the roof of your house with soft roofing materials, where bitumen mastic is indispensable.
Mastic based on modified bitumen for roofing
What is bitumen mastic
This is modified petroleum bitumen in its pure form, to which additives for various purposes have been added. It is the latter that smooth out some of the negative aspects of this waterproofing material. For example, his high turnover or cracking at low temperatures.
In appearance, roofing mastic is a pasty substance of black color, highly saturated. This is ready roofing material, which does not need to be diluted or heated with anything. The main requirement is to use at positive temperatures.
Bitumen mastic – black paste
Where and how to use it
Since we are talking about roofing option, then accordingly it is used on roofs. Here three use cases:
on flat roofs as a waterproofing and adhesive composition for soft roofs (roofing felt, glass hydroisol and others);
on pitched roofs as an adhesive in the process of covering some areas with asphalt shingles;
as roofing, if rubber, caoutchouc or latex are added to the mastic.
As for the application method, there are no complex variations here. For this they use paint rollers, brushes or spatulas. To completely cover the roof plane, special equipment is used that supplies the roofing bitumen coating under pressure, for which the equipment includes an air compressor.
Mastic is used to create roofing coverings
On our website you can find contacts construction companies who offer roofing services of any complexity. You can communicate directly with representatives by visiting the “Low-Rise Country” exhibition of houses.
Main advantages
We must pay tribute to bitumen mastic for roof waterproofing for its characteristics. They determined the popularity of this material. Its advantages include such characteristics:
high elasticity, which allows the applied layer to stretch at high temperatures without tearing, and at low temperatures not to shrink much;
high tensile strength, this allows you not to worry that the coating at the junction with other planes (for example, with a protruding pipe on the roof) will disperse or tear due to temperature changes or light mechanical loads;
long-term operation that corresponds to the service life of the same soft rabbit, which is within 15-25 years;
low price, in comparison with other types of waterproofing materials and adhesives;
high durability to aggressive environments and natural stresses;
ease of application on the surface of various building materials;
the latest types of mastic even do not require cleaning surfaces from rust, paint and other contaminants;
applied in its pure form to roof structure mastic, even in 2-3 layers, will be much easier than installing the same soft roof;
ease of repair roof covered with roofing mastic for the roof;
viscosity, which determines the thickness of the applied coating, that is, the layer is not applied too thin.
Easy to apply to building roofs
And as for shortcomings. There are few of them, but they are there:
Weather affect the ability to use this bitumen material.
Almost impossible to control thickness laid layer.
If there are a large number of flaws on the poured surface, for example, tubercles, protrusions, pits, then such a surface must be well prepared, smoothing out all defects, or increase the thickness of the mastic layer, that is, increase the consumption of material, thereby smoothing out the unevenness of the roofing surface being treated.
Types of bitumen mastics for roofing
In principle, the proposed classification is conditional. In it three positions:
Roof mastic cold application. This is a ready-to-use material. If there is a need for the composition to become more liquid, then it is diluted with solvents. But it should be noted that the mastic may not remain in a diluted state for long. It quickly pushes out any liquid, becoming viscous again. Therefore, the diluted mass must be used immediately. If the temperature outside is close to zero degrees, then the mastic mass must be heated to a temperature of +30 or +40C before using it on the roof.
Bituminous mastic for cold application
Hot application. A material rarely used today, because it was the first bitumen mastic that began to be produced as a replacement for hot bitumen. She doesn't have the best high performance, besides, before use, the mass must be heated to +150C. Therefore, today it has practically been abandoned, although it is still present in varieties. Someone might say that this particular variety is used for fastening rolled materials from the “soft roofing” category. There is no point in arguing, this is true, but cold mastics are also used in these construction operations.
Water based. What must be said about this material is that it is the most environmentally friendly of all those offered, because ordinary water is present as a solvent. After applying the solution, the water evaporates, and only bitumen with the additives added to it remains on the roof.
Hot bitumen mastic
There is another classification of roofing mastics, in which the types are divided according to the type of filler added to the bitumen. Here three positions:
Bitumen-polymer mastic, also known as latex. This is a symbiosis of bitumen emulsion and modified latex. The presence of latex in the mixture, that is, a non-toxic and non-hazardous substance, allows the mastic mass to be used even inside residential premises as a waterproofing coating. For example, inside a bathroom or toilet, where waterproofing work is carried out before laying tiles. It should be noted that the latex variety easily adheres to any building material.
Rubber-bitumen mastic for roof waterproofing. Fine grains are used as filler here. rubber crumb. This is purely roofing material; it is not used anywhere else. This mastic is applied to the surface of flat roofs by spraying under pressure. Some manufacturers offer modified mastics of this type that can be applied when temperature conditions from -40C to +80C. The most important characteristic rubber-bitumen mastic - do not stretch. And she doesn’t mind high mechanical loads.
With rubber filler. In all respects, rubber mastic is better than the former. Its distinctive feature is that it can stretch by 20% of its normal condition. That is, it is a fairly elastic coating that does not tear under strong temperature changes.
Bitumen-polymer mastic for roofing
Video description
For a clear overview of bitumen waterproofing, watch the video:
Rules for applying bitumen mastic to the roof
We will not consider here how bitumen waterproofing mastic is used for roofing when laying soft roofing or flexible tiles. These technologies are simple because the material is simply applied to the surface with a spatula, roller or brushes. A more complex process is creating a roofing covering using the mastic itself. We'll tell you about this.
First of all, it should be noted that bitumen mastic is laid on the surface of flat roofs after cleaning the latter. Therefore, if reconstruction is carried out, that is, replacing the old covering with a new one, then it is necessary to completely tear off the old roof, remove the old adhesive composition by any means until concrete surface ceilings The latter is cleared of debris, dusted and treated with a bitumen primer.
Roof treatment with bitumen primer
Now to the question of how many layers should be used when applying mastic.
If the roof slope does not exceed 10° , then three layers are laid, each of which must be dried before laying the next one. In this case, a reinforcing fiberglass mesh must be placed between the layers. The last freshly laid layer can be filled with fine crushed stone or gravel.
If the roof slope angle in the range of 10-20° , then two layers are laid with one reinforcing layer between them. Above bitumen roof can be painted.
If the angle of inclination exceeds 20° , then apply a single-layer coating with a thickness of at least 3 mm, which is covered with paint on top. Although experts recommend not reducing the number of layers to less than two.
Thickness of applied bitumen layers should not be less than 1 mm. The material itself is applied or bulk method, when the mastic is poured and distributed over the surface to be treated with mops and scrapers, or using pressure spraying. The first option is considered expendable, because it is difficult to level layers of a certain thickness. By the way, it should be noted that the average consumption of bitumen mastic on rabbits is 1.5 kg/m².
And a few words about the price of bitumen mastic. Of all the brands offered, the cheapest is bitumen-polymer mastic (MBM). One bucket weighing 16 kg costs between 900-1000 rubles. Bitumen-rubber mastic costs from 2000 rubles per bucket weighing 20 kg.
Video description
The video shows one of the technologies for creating a mastic roof:
Conclusion on the topic
The appearance of roofing mastics on the market has made the process of repairing or creating roofing coatings simpler and of higher quality. At the same time, there was no need to carry out hot work, as was the case with ordinary bitumen, which was previously used for restoration work. Low price and high quality The final result is the main advantages of this roofing material.
