What Is Roof Warranty?
Every new roof carries two distinct warranties. The manufacturer warranty covers material defects - typically 20-50 years, with 'lifetime' generally meaning 40-50 years and usually prorated after an initial non-prorated period. The contractor workmanship warranty covers installation quality and ranges from one year to 25 or more. Since the large majority of premature roof failures are installation errors, not material defects, the workmanship warranty is often the more valuable of the two - and it is only as good as the contractor's longevity. Enhanced system warranties (e.g., manufacturer-certified installer programs) extend coverage but require the full component system and a credentialed installer. Common voiders: inadequate attic ventilation, missing drip edge or starter strips, layering over old shingles against spec, pressure washing, and unapproved repairs. Warranties also interact with insurance claims - storm damage is an insurance matter, not a warranty matter, and repairs done outside spec can forfeit remaining coverage.
Also Known As
These are the search terms and phrases that commonly refer to this topic, so you can find it however you describe it.
How Roof Warranty Relates to Other Topics
A 'lifetime' shingle warranty covers manufacturing defects, usually prorated after an initial period - it does not cover installation errors, which cause most early failures and fall to the installer's separate workmanship warranty.
Roof warranties commonly condition coverage on reasonable upkeep - clearing debris, maintaining sealants - so a neglected roof can lose warranty standing over a failure the neglect did not even cause.
Read a Class 4 shingle's warranty before buying it for hail protection: manufacturers commonly limit or exclude hail damage from coverage on the very lines marketed for impact resistance - the rating speaks to insurers, not the warranty.
Related To Roof Warranty
Shingle manufacturers write attic ventilation requirements into their warranty terms, so an under-vented attic can void coverage on shingles that were themselves installed perfectly.
A workmanship warranty is only as good as the odds of finding the company that issued it - and workmanship problems typically surface two to five years in, which is longer than a chase crew stays in town.
Manufacturer wind warranties assume the printed nailing pattern was followed; a high-nailed or under-nailed roof can fail in rated winds and leave the owner arguing installation with a manufacturer who warranted only the shingle.
Questions about Roof Warranty?
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