Owens Corning states no fixed shelf life for asphalt shingles, but sets storage and handling conditions. Factory packaging, level dry support, drainage and appropriate stacking all matter
Owens Corning technical bulletin: Shingle Shelf Life Storage Technical Bulletin.
What this means for your roof
Owens Corning states no fixed shelf life for asphalt shingles, but sets storage and handling conditions. Factory packaging, level dry support, drainage and appropriate stacking all matter. The age of a bundle alone does not establish its condition or warranty eligibility.
A useful question for your contractor
Ask how older inventory was stored and inspect damaged or weathered packaging before use.
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 dated: October 2023. The date shown identifies the manufacturer document used for this summary.
Read Owens Corning: Shingle Shelf Life Storage Technical Bulletin
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.