How do roofing warranties work?

The three warranty layers

Product warranty. Issued by the shingle manufacturer (GAF, Owens Corning, CertainTeed, etc.). Covers manufacturing defects in the shingles themselves for a stated period, typically 25 to 50 years or a "lifetime" of the original owner. Defect claims are usually prorated after the first 10 years, meaning the manufacturer pays a declining share of replacement material cost over time. Labor to remove and reinstall is rarely included at the product-warranty tier.

Workmanship warranty. Issued by the installing contractor. Covers installation errors (improperly nailed shingles, missed flashing details, blown ridge vent specifications). Typical terms run 2 to 10 years from install. The strength of a workmanship warranty depends entirely on the contractor still being in business when a problem appears.

System warranty. Issued by the manufacturer when a certified contractor installs the full system using approved components (shingles, underlayment, starter, ridge, hip-and-ridge, flashing). Tiers include GAF Golden Pledge and Silver Pledge, Owens Corning Platinum, and CertainTeed SureStart Plus. System warranties wrap the product and workmanship coverage together, typically include labor on covered defect claims, and run 25 to 50 years.

What voids a warranty

Common warranty-voiding conditions:

• Installation by a non-authorized contractor (voids the system-warranty tier).
• Failure to register the warranty within the manufacturer's window (typically 30 days to 1 year from install).
• Roof-over (overlay) installation when the manufacturer specifies tear-off for the system warranty.
• Inadequate attic ventilation per the manufacturer's spec.
• Damage from causes the warranty excludes: hail, wind above the rated speed, falling trees, post-install foot traffic, third-party penetrations (solar panel mounts installed by a non-authorized contractor), and acts of war.

What homeowners should request

Before signing a roof contract, ask the installer for:

• A written copy of the manufacturer product warranty document.
• A written workmanship warranty signed and dated by the contractor.
• The system-warranty tier (if applicable) and proof of contractor certification.
• The warranty registration deadline and confirmation it will be filed.

After the install, store the documents in the home file alongside the closing paperwork. If the home sells, transfer the documents to the new owner. Most product warranties are limited or non-transferable, so the new owner inherits whatever transfer terms apply.

For the full pre-signing checklist, see Questions to Ask a Roofing Contractor. For warranty language inside a written estimate, see How to Read a Roofing Estimate. For the warranty downgrade that comes with overlay installs, see Tear-Off vs Overlay Roof.

This is general information, not a substitute for the specific warranty document on your roof.