Most commercial roofs fall under one (or a combination) of these categories:
Manufacturer’s Material Warranty
Covers defects in the roofing materials themselves.
Example: If the membrane cracks or fails prematurely due to a manufacturing issue.
Doesn’t cover: Improper installation or damage caused by outside factors (weather, foot traffic, poor maintenance).
Workmanship or Contractor Warranty
Provided by the installer, this covers errors in how the roof was put on.
Typically shorter than a manufacturer’s warranty (1–5 years is common).
Doesn’t cover: Material defects, normal wear and tear, or lack of maintenance.
Full System or NDL (No Dollar Limit) Warranty
Offered by some manufacturers when the roof is installed by an approved contractor (like Jewett Roofing).
Covers both materials and labor to repair covered failures.
Doesn’t mean “everything is included” — exclusions still apply.
Common Exclusions You Should Know
Here’s where many building owners are caught off guard. Even the strongest warranties usually don’t cover:
Storm damage (hail, wind, falling debris).
Damage from foot traffic or added equipment (HVAC, satellite dishes, etc.).
Ponding water caused by poor drainage design.
Lack of regular maintenance or failure to document inspections.
Why Maintenance Matters
A warranty is not a “set it and forget it” policy. Most require proof of regular maintenance to stay valid. That means professional inspections at least once or twice a year, plus after major storms. Neglecting this step could void your coverage altogether.
The Jewett Roofing Advantage
As a certified installer for top manufacturers, Jewett Roofing helps clients navigate warranty details before installation — so there are no surprises later. We also offer maintenance programs designed to keep your warranty intact and extend the life of your roof.
Key Takeaway
A roof warranty is valuable, but only if you understand its limits. By asking the right questions up front and scheduling routine maintenance, you’ll ensure your warranty works for you when you need it most.
Need help reviewing your warranty or setting up a maintenance plan?
Contact Jewett Roofing today — we’ll make sure your investment is fully protected.
