What is the use of impermeable membrane supply? What price? = Heilongjiang impermeable membrane manufacturers Contact [Li] (182 to 6481 to 7103) QQ: {46-37-96-887} look forward to your sincere cooperation HDPE impermeable membrane building roofing roofing incentive for quality problems exist in the construction works, and over the years has not been possible a good solution to the problem. Before installing the cover, impermeable layer of paving on the roof panels grassroots the whole shop roof impervious layer has become an integral component of a number of high-grade sloping roof system standard. When the roof design shift toward non-traditional direction, the the roof impermeable layer material role becomes even more critical. The proper use of the impermeable layer of material, accelerate the construction process to ensure that the roof from the effects of climate change. Used more often than the rigid and flexible waterproof two approaches. Rigid waterproof strain due to temperature difference, easy to crack seepage; flexible waterproof geomembrane high-density polyethylene (HDPE), ethylene propylene diene monomer rubber, modified bitumen, SBS and other organic materials. In recent years, a variety of new waterproof materials have come out, but due to higher prices, the lack of construction experience, and the durability is yet to be further examination and other reasons. Therefore, the current or the use of cost-effective HDPE impermeable membrane based. Roofing impermeable material is selected, the three key indicators need to pay attention, i.e.: Exposure time limit, lap integrity and dimensional stability. Exposure time limit the roof impermeable layer material is not permanently exposed to sunlight, more than the prescribed time limit, the ultraviolet rays can cause degradation of the physical properties of the impermeable layer of material. An impermeable layer of material to choose wisely, the need to consider is how to play their intended function within the roof assembly system. Lap integrity of the metal plate or any sloping roof cover, through the board of mechanically fastened to the structure. In many cases, this means that the barrier layer material will be throughout most of the screw. Under normal circumstances, you should try to avoid the waterproof layer is penetrated, but many times is inevitable. If, however, the the roof impermeable layer material well-designed, with high-quality self-adhesive layer, can be sealed feedthroughs. ASTME1970 is self-adhesive polymer modified bitumen membrane impermeable layer testing standards for sloping roof anti-ice dam protection. In this standard, the self-density properties of the nail is placed in the head of 127mm deep penetrations by observation to detect leaks.