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Commercial Roof Maintenance

A practical checklist for roof drains, seams, flashing and service records, illustrated with our commercial roofing photos.

Completed: TPO Roof and Metal Perimeter in San Antonio, 2022

A repeatable inspection and recordkeeping routine makes roof decisions easier. Follow the manufacturer’s maintenance requirements and arrange qualified inspections. Building staff can log interior and ground-level observations without climbing onto the roof.

What to check

AreaWhat to documentWhy it matters
InteriorLeak location, time, weather and photosHelps trace patterns instead of guessing from the ceiling stain alone.
Drains and guttersDebris, blocked outlets and drainage concernsWater needs a clear path off the roof.
Seams and flashingsOpenings, damage and prior repairsTransitions are important inspection points.
Rooftop equipmentRecent service visits, new penetrations and damageOther trades can affect roof details.
Edges and penetrationsLoose metal or disturbed sealsSmall defects can become larger water-entry paths.
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Commercial roof details from our 2022 San Antonio project.

Commercial roof details from our 2022 San Antonio project.

A simple schedule

WhenAction
Spring and fallArrange roof condition reviews, following the warranty and maintenance requirements.
After significant storms or a new leakDocument the issue and arrange an inspection as needed.
After rooftop equipment workCheck that roof details and access paths were left intact.
After repairsSave photos, scope, invoices and warranty records together.
The junction between roof areas and perimeter details deserves inspection attention.

The junction between roof areas and perimeter details deserves inspection attention.

Keep one roof file

Store the roof plan, product names, warranty, inspection reports, leak log and completed repairs together. Give the roofer access to this history so recurring problems are easier to identify.

Completed TPO and metal perimeter roof in San Antonio, 2022.

Completed TPO and metal perimeter roof in San Antonio, 2022.

Avoid mismatched repairs

Do not assume a general-purpose sealant is compatible with the membrane. Use repairs and accessories approved for the actual roof system. Report active leaks promptly and arrange qualified repairs.

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Manufacturer references

GAF roof maintenance resources

Carlisle inspection tips