Application Primaplex in classical designs in combination with non-combustible materials in the materials used in the classic roofing systems, in particular trapezoidal sheet, is of great importance to fire. Despite the fact that Plate Primaplex made of organic polymeric materials, fuel, by its very nature, however, they are, according to Russian classification, the class of flammable materials and evanescent flame. This can be explained presence in the boards flame retardants – an effective fire-fighting supplements to prevent accidental ignition of the material when exposed to small open flame. Of course, when exposed to intense fire boards can be ignited. To improve the fire resistance of the classical design of trapezoidal sheet possibly in conjunction with plates Primaplex application materials with the group ng (non-fuel), such as mineral wool increased density thickness of not less than 50 mm or steklomagnezitovy sheet of 4-6 mm. Joint application of plates Primaplex and above non-combustible materials, as shown by preliminary tests, allows to reach a class of constructive fire danger K0-15, which means that at least 15 minutes.

fire influence on the design of it is not a thermal effect, damaging and burning materials. In addition, the achieved fire resistance design RE15, that means that within 15 minutes. structure retains its integrity and its collapse does not occur when the regulatory snow load. Some contractors offer to abandon steam insulating layer, usually a stacked for trapezoidal sheet. They explain their decision so that the extruded polystyrene itself can play the role of steam insulating layer.

Tags: materials