Roofing material is a material for waterproofing the roof of residential or industrial premises. It is made from roofing cardboard, with the addition of polyester, bitumen impregnation and fiberglass. In the process of roof repair or construction, two types of roofing material are used: lining and upper. In our article we will consider in detail the following types of roofing material: RPP-300, RPP-200 and RCP-350.
Let's compare the technical characteristics of these roofing materials and the cost of each of them.
GOST, according to which the production of roofing products is carried out, involves the application of marking on special tags that are fixed on each roll of roofing material. Marking is a special letter code or abbreviation that contains basic product information. To determine the type of roofing felt, you just need to look at the tag, and you will immediately understand what material is in front of you.
When marking goods, they usually indicate:
the first letter in the abbreviation indicates to what category the roofing material belongs to. Roofing material marking always begins with the letter "P";
The third letter of the marking indicates the type of sprinkling. There are four main types of dressing: K-coarse-grained, M-fine-grained, H-flake, P-dusty;
ATTENTION! Sometimes in the marking of the roofing material of the lining rpp-300, you can see the letters A or B.
They indicate the brand of the used roofing cardboard. "A" is a cardboard with an impregnation time of 45 seconds and an absorbency of about 145%, and "B" - with an impregnation of 55 seconds and an absorbency of 130%.
Roofing materials are used at the finish of the structure and repair of the roof. Technical indicators give a guarantee of quality, resistance to external influences, including the sun, and serve for at least 5 years. The basis of the roof with coarse-grained dressing includes cardboard with a density of 300 g / m2, and impregnated with bitumen.
The top layer is sprinkled with stone chips.
The most common materials are such brands as: roofing material RKK 350 and RKK 400. As an example, consider one of these materials in more detail below.
В In construction, a brand of roofing material used for the top coating of RKK350 is common This roof is made of dense cardboard, which is impregnated with a bituminous mixture with coarse-grained stone dust.
The technical indicators are as follows :
The length is usually 10 m, in rare exceptions it reaches 15 m, but this depends on the type of powder. The area of the roofing material is 10 m2. The dimensions are clearly spelled out in state standards, so the slightest inconsistencies can lead to the rejection of the entire batch;
REFERENCE! For roofing material, the price of a roll varies from 250 to 290 rubles. An excellent option for price and quality.
Roofing bituminous coating is produced by many well-known companies, for example, Evega, TechnoNIKOL.
A bituminous lining is used as a lining for ondulin and for 100% waterproofing of the foundation. It is produced with a relatively low density of cardboard (up to 300 g / m2), impregnated with a bitumen mixture. All lining types of roofing are less resistant to temperature changes, moisture and mechanical external influences. Therefore, the service life of this material, as an independent unit, is only a couple of years.
The most common brands RPP-300 and RPP-200.
This roofing material is used to repair the roof, as a substrate for roofing materials and for waterproofing the foundation layer. This brand is widely used in the construction industry because of its reasonable cost and high moisture resistance. It differs from RPP-200 in that it is produced from a special cardboard with a density of 300g / m2.
Properties of roofing material RPP 300 and technical characteristics correspond to GOST:
The surface of the bitumen layer consists of a dusty powder of chalk or talc magnesite. Thanks to this spraying, the bitumen layers do not stick together. The dressing will not affect the properties of the bitumen and will not impair the resistance to damage or moisture.
ATTENTION! The cost of a bitumen roll will be 250 rubles. This price will allow you not to save on roofing roofing felt and buy it in the required quantity.
For a high-quality roof repair, you will need two layers of lining roofing material.
Recall that the RPP-300 brand stands for lining roofing material with a special coating applied and a cardboard density of 300 g / m2. Chalk dusting helps to avoid sticking layers of roofing material during long-term storage of rolls.But still, with improper storage, some adhesion of the coating may be allowed, but this is quite rare. Rolls of roofing material RPP 300 according to GOST are stored strictly in an upright position.
The laying technology is as follows:
As you can see, there is nothing complicated in bitumen flooring. After studying the step-by-step instructions or consulting with a specialist, you can easily lay it with your own hands.
We hope our article helped you!
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