What kinds of flaws or damage are covered by manufacturer’s warranty?

The manufacturer’s warranty covers defects in the materials themselves and not damage sustained during or after the installation. In order to determine if failing shingles are the result of defective materials or subsequent damage, a certified roofing contractor will need to inspect the area where the failure occurred. For the warranty to be valid, many companies require a third party to inspect the roof after installation to ensure that the job was done to manufacturer’s specifications.
