... .0mm 2).Convenient maitance with low cost PVC waterproof membrane 1).Durable: If the pvc membranes used on exposed surfaces,the effective ... resitance, no pollution to environment 4).Root-resistance: The pvc membranes can be used on planting roofs. 5).Used ... for roof construction, subway, bridges, channel tunnel, planted roof, waterproof and drainage system, pools, dam, irrigation system, light steel ...