Roof accessories and adjacent building products can contain materials that react with asphalt. GAF highlights why product compatibility needs review before installation.
GAF technical bulletin: Asphaltic roofing in contact with non compatible building components and roofing accessory products tab r 157.
What this means for your roof
Roof accessories and adjacent building products can contain materials that react with asphalt. GAF highlights why product compatibility needs review before installation.
A useful question for your contractor
Ask who has confirmed the specific combination of membrane, sealant and accessory.
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.