What's Actually Covered Under a Commercial Roof Warranty
A commercial roof warranty sounds reassuring right up until there's an actual leak and someone has to figure out whether it's covered. I make a point of walking every client through this before a new roof ever goes on, because I've seen what happens when nobody reads the fine print until it's too late.
There are usually two warranties, not one
A new commercial roof typically comes with a manufacturer warranty, covering the materials themselves, and a contractor's workmanship warranty, covering the installation. These are two separate documents with separate terms, and mixing them up is one of the most common mistakes I see building owners make when a problem comes up later.
What the manufacturer warranty typically covers
These generally cover defects in the roofing material itself, things like a membrane that fails prematurely because of a manufacturing flaw. Most commercial membrane warranties run somewhere between 10 and 30 years, depending on the system and the specific terms purchased. They usually require the roof to have been installed by a certified contractor and maintained according to the manufacturer's guidelines, which is part of why I keep records on every job.
What my workmanship warranty covers
A workmanship warranty covers installation errors, a seam that wasn't welded correctly, flashing that went in wrong. These are usually shorter than manufacturer warranties, often in the one to ten year range, and they come from me, not the material manufacturer. If a leak develops because of how the roof was installed rather than a material defect, this is the warranty that applies.
What voids a warranty
This is the part that catches building owners off guard most often. Common exclusions include damage from foot traffic by unauthorized personnel, modifications made by other contractors after installation, like a satellite dish or HVAC unit installed without proper flashing, skipped maintenance and inspections, and damage from standing water if the roof wasn't designed or maintained for proper drainage. Some warranties also require annual inspections by a certified contractor to stay valid, and I've seen coverage get voided over a missed inspection even when the actual problem had nothing to do with it.
Why I keep documentation on everything
If a warranty claim ever needs to get filed, having records of regular maintenance, inspections, and any repairs performed is the difference between a claim that gets approved quickly and one that gets disputed. A maintenance log isn't just good practice. It's often the evidence that protects your warranty in the first place.
Questions I'd want you to ask before a new roof goes on
What's the manufacturer warranty term, and does it require specific maintenance to stay valid. What's the separate workmanship warranty term from your contractor. Is the warranty transferable if you sell the building. Asking these three questions before a contract gets signed prevents a lot of confusion years down the road.
Getting clarity on your existing warranty
If you're not sure what's covered on a roof that's already in place, I can usually review the existing warranty documents and help you understand what they actually mean for your building. Call me at (641) 629-1451 or visit encorroofing.com.
