Extruded board called the extruded polystyrene insulation board, English code xps, as a new type of insulation material, extruded sheet used in recent years on construction projects increasingly widespread. Its scope of application has been extended to: external insulation in the roof insulation wall partition wall insulation cold storage to prevent secondary heat heating ground frost Landscape Decking,Landscape Decking Material - Shanghai Seven Trust roadbed and so on. However, in the application of some of the issues we should pay attention to the following, I will be described separately, today mainly to talk about in the roof insulation extruded plate applications: roof insulation, some of the traditional materials mainly: slag insulation, vermiculite insulation, cement other than perlite insulation, hydrophobic perlite insulation, these insulation materials, in addition to the weight of large, cumbersome construction, its main indicators very poor thermal conductivity, are as follows: cement perlite extrusion plate used in roofing, either in accordance with traditional practices to be adopted inversion method.

The so-called traditional practices, namely first insulation layer, then a waterproof layer and the inversion method is to waterproof layer is disposed below the insulation layer, which is also called price comparison composite vs wood porch flooring roofing inverted roof. Since using extruded sheet, we generally recommend inversion Method. For the following reasons: traditional practices: the waterproof layer is placed insulation board (ie extruded plate) above the main disadvantages are mainly two: 1, since the board is a rigid extruded sheet, which can not be in contact with the bottom completely consistent no gap is due to the presence of cracks in the Master roof.

because people walking back and forth, is bound to cause extruded board activities, so that the upper layer of water will often bend back and forth phenomenon last long, it is easy to appear in the crease waterproof layer cracks or breakage, resulting in water leakage; 2, China's general waterproofing layer done, sprinkle a layer of green bean that is only on the finished waterproof layer, waterproof layer under prolonged exposure to sunlight, time a little long, appears waterproof layer aging, resulting in leakage, we had to replace the waterproof layer. The upside-down veranda composite decking railing and fencing approach just to avoid these two drawbacks. The waterproof layer is placed below the insulation layer, waterproof layer does not even appear damaged due to external forces, it will not because the sun ultraviolet irradiation aging, extend the life of waterproof layer, greatly reducing future maintenance costs. Therefore, although the use of extruded plate for the roof, there are two approaches, we advocate the use of inverted construction method, not because of the wrong level down and use of this material to produce the opposite effect.