Have you been told your flat roof comes with a "Duro-Last warranty," but nobody explained which one? Or did you read online that Duro-Last only offers 15 or 20 years on homes? If so, you're not alone. Some of that information is now out of date, and even a few of Duro-Last's own brochures haven't caught up yet.
RoofSmart is a Duro-Last authorized PVC contractor, so we keep track of these changes for our customers. In this article, you'll learn what changed for homeowners, what changed for commercial building owners, what the upgraded warranties require, and what to ask before you sign.
Before 2026, Duro-Last's residential warranties were 15 or 20 years, and they were material-only. That means Duro-Last covered defective membrane, but you paid for the labor to fix it. Those 15 and 20-year material warranties still exist (reissued on forms dated 06.04.2025). Here's what was added on forms dated 04.27.2026:
Duro-Last's main warranties page was updated on August 31, 2026 to show residential terms of 15, 20, 25 or 30 years. The Lifetime warranty appears in Duro-Last's specification library, not on that page. Some Duro-Last brochures and FAQ pages still describe only 15 and 20-year residential warranties, so you may see older numbers out there.
In 2025, Duro-Last's parent company became Amrize, a spin-off from Holcim. Duro-Last's commercial warranty forms dated 06.04.2025 were reissued under Amrize Building Envelope LLC. For most commercial owners, this is a paperwork change:
If you have an older Duro-Last warranty that says "Duro-Last, Inc.," don't panic. Your existing warranty doesn't disappear because the parent company changed. Keep your paperwork somewhere safe.
Upgraded warranties (NDL, 25 and 30-year terms, and Lifetime) have stricter requirements to qualify, so the roof costs more to build to that standard. Here's where the cost comes from:
We don't list fee amounts here because Duro-Last sets them, and they can change. We'll show you exactly what applies to your roof in writing before you decide.
It depends on how long you plan to stay and how much risk you want to carry (see how to choose a PVC warranty level for your home). A material-only warranty protects you against a defective membrane. Many flat roof leaks trace back to installation details, not the membrane itself. That's why an NDL warranty, which also covers leaks caused by the installer's workmanship, is a real step up. It's also why choosing the right installer matters more than any warranty.
If you're selling in a few years, a standard warranty may be all you need. If you plan to stay a long time, or you have a rooftop deck or a complex low-slope roof, an upgraded warranty can make sense. A meticulous roofing nerd can walk you through both options for your roof.
Yes. Residential forms dated 04.27.2026 added 25 and 30-year material-only warranties, 20, 25 and 30-year NDL (labor and material) warranties, and a Lifetime warranty. The 15 and 20-year material-only warranties are still available.
It lasts for the life of the original owner, material only, prorated. It doesn't cover labor or the contractor's workmanship. If the property is owned by a company or trust, or the warranty is transferred, it becomes a fixed term based on membrane thickness.
NDL stands for "No Dollar Limit." An NDL warranty covers labor and material to repair covered leaks, including leaks caused by the installing contractor's workmanship. Duro-Last's new residential NDL warranties come in 20, 25 and 30-year terms.
Upgraded warranties have stricter requirements to qualify. The roof has to use Duro-Last system components like tapered insulation, polyiso, coverboard and the specified fasteners and screws, and it has to pass a required Duro-Last inspection with a registration or inspection fee.
Commercial warranties were reissued on forms dated 06.04.2025 under Amrize Building Envelope LLC, Duro-Last's new parent company. The warranty families (Supreme, Ultra and Basic) stayed the same. The company name and the governing state on the paperwork changed.
The parent company change doesn't cancel an existing warranty. Your coverage follows the terms on your own warranty document. If you can't find it, contact Duro-Last with your roof's address.
Many Duro-Last warranties can be transferred, but most require Duro-Last's written approval and a transfer fee, and some require an inspection. A transferred Lifetime warranty becomes a fixed term. Check your own warranty document for the exact rules.
Only a Duro-Last authorized contractor can install a Duro-Last warranted roof. RoofSmart is a Duro-Last authorized PVC contractor serving the Greater Seattle area.
Because some sources haven't been updated yet. As of October 2026, a few Duro-Last brochures and FAQ pages still describe only 15 and 20-year residential warranties, even though Duro-Last's warranties page and specification library show the newer terms.
Whether you own a Seattle home with a low-slope roof or a commercial building, we'll inspect your roof, explain your warranty options in plain English, and show you in writing what each one requires. No pressure, just honest options.
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Talk to a roofing nerd or call (206) 487-4877.