GAF explains that shingle weight alone does not establish quality. Reinforcement, asphalt properties, granule attachment and tested performance all contribute.
GAF technical bulletin: Asphalt shingle recipe for superior quality and performance.
What this means for your roof
GAF explains that shingle weight alone does not establish quality. Reinforcement, asphalt properties, granule attachment and tested performance all contribute.
A useful question for your contractor
Ask for product specifications and relevant test ratings rather than comparing weight alone.
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: Asphalt shingle recipe for superior quality and performance
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.