Shingles installed in the fall or winter may not seal until the following spring… Failure of the shingles to seal under any of the above circumstances is not a manufacturing defect and
CertainTeed will not be responsible for repairing, replacing or hand-sealing any shingles under
any such circumstance.
Limited Wind Warranty
(Landmark 30-50 year) shingle products are warranted to resist blow-off damage due to wind velocities… during the first five (5) year period following application of the shingles.
If any such blow-off damage does occur during those initial time periods after application, CertainTeed will furnish replacement
shingles without charge for those shingles damaged (but will not be responsible for labor costs pertaining to removal or replacement of damaged shingles). If the applied shingles contain self-sealing asphalt strips, and if any of these strips fail to activate within the first year following application, CertainTeed shall have no liability under this warranty for such a defect unless CertainTeed is afforded the opportunity to hand-seal, at its expense, any non-sealing shingles.
certainteed.com/NR/rdonlyres … rranty.pdf
The Limited Wind Warranty applies only until the fifth anniversary of the date of original installation of the Shingles, and ELK’s liability for any breach of the Limited Wind Warranty is limited to ELK’s obligation to pay the reasonable cost of replacing Shingles that have blown off and the reasonable cost of manually sealing any unsealed Shingles which have had adequate exposure to heat.
ELK shall not be liable for… failure of any Shingles to seal due to insufficient heat exposure or direct sunlight.
elkcorp.com/homeowners/warra … stique.cfm
So, CertainTeed does say that they NEVER be liable for non-sealing problem in case of fall-winter shingle installation. Don’t they?
It seems to me that ELK stands for their products at fall-winter installation to a greater extent than CertainTeed.