What Voids a Commercial Roof Warranty?

Commercial roof warranties provide valuable protection — but they have specific exclusions. Here's what can void your coverage and how to avoid it.

Failure to Maintain

Most manufacturer warranties require documented semi-annual inspections and prompt repair of mechanical damage. Failure to maintain the roof per the warranty requirements — and failing to document that maintenance — is one of the most common ways warranties are voided. Keep maintenance logs with dates, findings, and repairs made.

Unauthorized Modifications

Installing new HVAC units, antennas, solar panels, or other rooftop equipment without notifying and potentially involving the roofing contractor can void warranty coverage for the areas affected. Always consult with your roofing contractor before any work on the roof surface.

Using Non-Approved Repair Materials

Applying incompatible sealants, coatings, or repair materials over a warranted system can void coverage. Always use manufacturer-approved materials for any repairs to a warranted system.

Non-Approved Contractors

Having non-manufacturer-approved contractors perform repairs on a warranted system can void coverage. Any repair work should be performed by or with the blessing of a manufacturer-approved applicator.

Missing the Recoat Window (Foam Roofs)

For spray foam systems, missing the recoat schedule window and allowing significant UV degradation of the foam substrate can void warranty coverage and require more extensive remediation before a new warranty can be issued.

Acts Beyond Coverage

Damage from intentional acts, unusually severe weather events beyond design parameters, or building structural failures are typically excluded from roofing warranties regardless of maintenance.