... of up to 50 years. PVC waterproof roll:PVC waterproof roll has non-toxic,odorless,environmental protection advantages. ... .2 surface requiement:1.the joint of one roll no more than one, and Joints should be ... cut neatly2. the roll surface should be smooth, neat edges, no cracks, ... and bonding3. roll surface of the bubble, scar depth of not more than 30% of sheet thickness, Per 1 ...