Cold shingles can be brittle, while hot shingles and sealant can be vulnerable to handling damage. GAF describes precautions rather than one universal temperature cutoff.
GAF technical bulletin: Temperature extremes & fiberglass asphalt shingles.
What this means for your roof
Cold shingles can be brittle, while hot shingles and sealant can be vulnerable to handling damage. GAF describes precautions rather than one universal temperature cutoff.
A useful question for your contractor
Ask how storage, handling, foot traffic and sealing will be adjusted for the forecast.
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 26, 2024. This is the date of the manufacturer source, not a claim that this website guide existed on that date.
Read GAF: Temperature extremes & fiberglass asphalt shingles
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.