At present, with the advancement of the chemical industry, the rubber and plastics industry has made significant technological advances, and the new roofing waterproofing material provides a material basis for the development of single-layer roofing. Since then, single-layer roofing based on rubber and plastic has appeared in the low-slope roofing sector.
First, the Arab oil embargo of 1973 led to a sharp rise in oil prices and a shortage of high-quality roofing new waterproofing materials. At the same time, higher energy prices have increased the demand for new waterproof material systems for higher thermal resistance roofing.
This makes the new waterproofing material for single-story roofs even more attractive because it can be placed directly on advanced insulation boards such as polyisocyanurate and expanded polystyrene. At the time, there were some functional problems with the new waterproof materials for laminated roofs, such as double-layer failure and foaming on polyurethane insulation boards.
Nevertheless, at that time, the new waterproof material contractor of the roof was still cautious about the use of the single layer. The new waterproof material of the flat roof did not count the modified asphalt. In 1997, it only accounted for less than 10% in the new waterproof material market of low grade roof. Afterwards, the material quality of the new waterproof material for single-layer roofing was continuously improved, and the construction technology was improved and improved accordingly. The new waterproof material for single-layer roofing grew rapidly and continuously. It increased to 25% in 1984 and rose to 48% in 1987. More than half of the year, accounting for 54% of the market, has become the new waterproof material for the roof.
According to statistics, in 2005, the United States single-layer roof new waterproof materials association member company provided 278.7 million m2 roofing new waterproof material coil, which was more than twice the supply in 1984, and the output was huge.