product feature ：

1.Purlin-free flexible waterproof and thermal insulation roofing system. Passed CE certification
2. The wave height of corrugated board is 155mm, the width of board is 840mm, the thickness of board is 0.88mm, the continuous span of board is up to 6.3m, and the fire-resistance level is A1
3. Double-layer rock wool (140mm+80mm), roof heat transfer coefficient is not more than 0.17 W/(m2-K)
4. Waterproofing membrane TPO thickness 1.5mm~2.0mm.