Leak Barriers Next to PVC and Vinyl-Coated Metal
Bulletin revision: February 1, 2021
Some plastics and coatings can interact with asphalt-based membranes. GAF advises checking compatibility rather than assuming every PVC product behaves alike.
GAF technical bulletin: Stormguard® / weatherwatch® leak barriers in contact with PVC products / vinyl coated metal products.
What this means for your roof
Some plastics and coatings can interact with asphalt-based membranes. GAF advises checking compatibility rather than assuming every PVC product behaves alike.
A useful question for your contractor
Ask for written compatibility guidance for the exact materials touching each other.
Ask for the answer to be tied to the actual roof condition and the exact product being installed. Keep the agreed repair or installation detail with your estimate and project photos.
Bulletin revision: February 1, 2021. This is the date of the manufacturer source, not a claim that this website guide existed on that date.
This homeowner summary explains the cited bulletin. The complete manufacturer document and current product instructions govern the installation details. A requirement for one manufacturer or product should not be transferred to another without checking.