Rolled roofing materials are widely used in roofing. The roof of them is one of the most inexpensive and simple in manufacturing technology. Despite the relative cheapness, subject to all technologies, a four-layer roofing from roofing material will serve as much as a metal roof made of galvanized steel. However, the roof of the roofing material has one significant drawback - it is flammable.
Soft roofing materials stacked in several layers, each of which has a specific function. The bottom layer is coverless materials (lining), and the top layer is cover materials. The main feature of the coating material is the presence of a layer containing a powder (dusty, fine-grained or coarse-grained) and refractory bitumen.
The most commonly used roll roofing materials are glassine, roofing and roofing felt. They are very easy to fit. They are used on roofs with a slight slope on a solid base.
One of the main properties of soft roofing materials is water resistance. This property is preserved only with the complete integrity of the material, that is, in the absence of tears and cracks.
To make the roof quality and durable, rolled roofing materials must comply with the following parameters:
- tensile strength (material is torn into strips of 5 cm, and the more effort is applied, the stronger the material);
- resistance to heat;
- the flexibility of the material is evaluated at the lowest temperature at which no cracks appear when bent on the rod.
Roofing materials. Kinds
Depending on the basis, rolled roofing materials There are the following types:
- on the construction of the canvas - baseless and basic;
- by the type of components of the coating composition - polymer, bitumen, bitumen-polymer;
- by type of basis - cardboard, asbestos, fiberglass, polymer and combined;
- according to the structure of the protective layer - with foil or film, with scaly, dusty, coarse-grained, fine-grained.
Also, depending on the binding components, they are polymer-bitumen or bitumen.
Bituminous roofing materials have a low price and lower quality, in comparison with polymer-bitumen. The disadvantage is the low level of frost resistance. However, this material is often used for internal waterproofing of a building due to its moisture resistance.
Polymer-bitumen roofing roll materials have much more advantages than previous ones. However, their price is higher. They have a high degree of strength and reliability, resistant to very low and high temperatures. These qualities are decisive when choosing roofing materials for the harsh climatic conditions of our country. These materials can last about 25 years, subject to the technology of manufacture and laying of the roof.
With a sufficient assortment of soft roofing materials, bitumen-polymer roll are a new modern word in roofing. However, when choosing, you must set your own priorities and decide what is more important for you: price or quality?