Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

Can the PVC Deck membranes be laid over existing rubber or bitumen deck membranes?

April 26, 2017Bitumen deck existing laid Membranes PVC rubber

0

Posted

Can the PVC Deck membranes be laid over existing rubber or bitumen deck membranes?

1 Answer

0

Posted

A. No, not without a seperating layer of plywood or cement sheet mechanically fixed over the existing. Rubber and Bitumen are not compatible with PVC and the adhesives used for PVC will not bond to rubber or bitumen. The thermoplastic properties of the 3 membranes mentioned are totally different and even if they could be bonded together, there would be different amounts of expansion and contraction between the two, causing wrinkling, bubbling and delamination.