GAF's release film keeps shingles from sticking together in the bundle. It is designed to remain in place; the installed courses position the sealing surfaces differently
GAF technical bulletin: Clear plastic release film leave on or take off.
What this means for your roof
GAF’s release film keeps shingles from sticking together in the bundle. It is designed to remain in place; the installed courses position the sealing surfaces differently. Removing the film or heating shingles is not the normal installation method.
A useful question for your contractor
Ask the installer to explain the difference between packaging release film and the installed sealant strip.
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.
Read GAF: Clear plastic release film leave on or take off
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.