When building buildings, regardless of the type of roofing and roof structures, some types of work are standard. This is the implementation of the rafter system, the installation of the battens, the laying of the “pie”, which includes several layers, such as insulation, waterproofing and others. At the same time, it can be noted that for the high-quality implementation of work, it is necessary to choose the right materials. So, for insulation, roofing mastic is often used, which is available in various types. Consider the application and varieties of this material.
Types of waterproofing material
Roofing mastic is an astringent made of organic compounds with a filler, which can be used as substances such as asbestos, mineral wool, slag, quartz, talc and others. These additives improve the technical characteristics of the material (increase strength, resistance to thermal influences, reduce brittleness in frost, etc.). In addition, antiseptics and herbicides are added to mastics to prevent the appearance of fungal formations, lichens and other implants.
Depending on the type of organic matter, the following types of mastics are distinguished:
- bituminous;
- tarry;
- combined (rubber-bitumen, bitumen-polymer and others);
- polyurethane.
Also, this material can be conditionally divided depending on the method of use into the following types:
- Hot mastic roofing - this type of cementitious raw material is used in a heated form to carry out the fastening of roofing material, roofing material and other coatings. In addition, they are used as a protective layer for roofing structures. As a rule, this type of roofing waterproofing has the designation MBK-G - **, where in place * there are numbers indicating heat resistance. Depending on the region of the area and the slope of the roof , mastic with a certain heat resistance is used. For example, for northern latitudes, for the design with a slope of less than 2.5%, the use of MBK-G-55 is recommended.
- Cold mastic - this raw material is used to seal when processing the abutment points of the coating sheets, when laying rolled material for roofing and repair work. When using this type of mastic diluted with solvents (uyat-spirit), gasoline, solvent and others.
The use of material for roof waterproofing
The conditions and methods for using this material may be different, but some points can be highlighted that are common for all types of mastics:
- Cold roofing mastic can be applied with a spatula, and when using a brush or when applied by draft, it must be diluted, while the permissible level is no more than 30% of the solvent.
- The liquid mastic must be applied on a flat, clean surface, on which a primer layer of bitumen primer must first be applied .
- When performing work, care must be taken, since the substances that contain roofing mastic are toxic. Therefore, in order to protect yourself from poisoning, it is recommended to wear safety glasses, a respirator (when applying hot mastic), gloves and special clothing.
- Hot bituminous roofing mastic is usually prepared using special equipment at the factory. Self-preparation is also possible, but it is necessary to prepare a container around which a brick lining is installed. Also, the tank cap must close tightly. The heating temperature is about 180 ° C, while the solution must be constantly stirred, excess impurities must be removed (for these purposes, you can use a metal sieve or other similar device). Hot mastic should be prepared 2-3 hours before work is completed.
Roofing mastic provides a strong hermetic connection of coatings, and the waterproofing layer is smooth, strong and quite durable. The use of this material helps prevent the appearance of fungal formations and corrosion damage, which improves the quality of work performed.