Fort Worth has a lot of commercial roofs that are hard on a membrane: big warehouse and strip-center roofs, restaurants venting grease, and rooftops crowded with HVAC units and curbs. One PVC system that comes up a lot on those buildings is Duro-Last, the custom-fabricated PVC roof.
I’m Blake Snow, and I’ve been roofing for 30 years. We install PVC, TPO, EPDM, modified bitumen, coatings and metal on commercial buildings, so we don’t push one brand. Here’s what Duro-Last’s own documents say, and the warranty details owners should read before signing.
Duro-Last in one paragraph
Duro-Last has been making roofing since 1978. Its fact sheet now lists it as a brand of Amrize Building Envelope, the same company that owns the Elevate line we covered in our Holcim Elevate post. The big idea is custom fabrication: Duro-Last builds the roof sections in its factory to your building’s measurements, and up to 85% of the seams are completed there instead of on the roof. Flashings, skirted edge metal and other accessories are custom-fabricated from the same membrane. Source: Duro-Last 2-Minute Fact Sheet (rev. 3/24/25) and Membrane Reference Guide (rev. 7/2/26).
The flagship membrane: 40, 50 and 60 mil
| 40 mil | 50 mil | 60 mil | |
|---|---|---|---|
| PVC film above scrim | 17 mil | 28 mil | 28 mil |
| Weight | 0.22 lb/sq ft | 0.29 lb/sq ft | 0.36 lb/sq ft |
| Scrim | 18 x 14 weft-inserted | 18 x 14 | 18 x 14 |
| Largest custom deck sheet | 2,500 sq ft (100 ft max side) | 2,000 sq ft (80 ft max) | 1,500 sq ft (60 ft max) |
| Colors | White, tan, gray, dark gray | Adds terra cotta | White, tan, gray, dark gray |
Source: Duro-Last fact sheet and Membrane Reference Guide.
The line that matters most: 50 and 60 mil have the same 28 mil of PVC above the scrim. The extra 10 mil on the 60 is below the scrim. The top layer is what weathers and takes foot traffic, so compare that number, not just the total thickness, when you compare bids. Need more on top? Duro-Last’s 80 mil membranes are separate products.
Duro-Last lists three ways to attach it: Duro-Bond induction welding (the membrane is bonded to coated plates without penetrating it), adhered, or mechanically attached with fasteners and plates.
Duro-Last warranty families
Duro-Last’s Membrane Reference Guide lays out four families. Here’s the short version:
| Family | What it includes | Key terms (minimum mil, PVC) |
|---|---|---|
| Supreme | NDL plus consequential damage coverage for the first 15 years | 15-yr NDL (40 mil); 20-yr NDL with 15-yr consequential + 5-yr material, or + 5-yr labor and material (50 mil) |
| Ultra | Material and labor; no consequential damages | 15-yr hail (50 mil); 15-yr hail and high wind (50 mil); 15-yr high wind (40 mil); 20-yr high wind (50 mil) |
| Basic | NDL; no consequential damages | 15-yr (40 mil); 20-yr (50 mil); 25-yr (60 mil); 30-yr (80 mil) |
| Residential | Material only | 15-yr (40 mil); 20-yr (50 mil) |
Footnotes worth reading:
- Hail and high-wind warranties need engineering preapproval, and Duro-Last must supply all products.
- Wind coverage at 55 mph and up needs a High Wind Warranty Letter of Intent from Duro-Last Engineering Services.
- The 25- and 30-year Basic warranties come with a Care and Maintenance Guide that must be followed for the life of the warranty.
- The flagship 40-60 mil sheet can’t get the 30-year warranty. That takes 80 mil.
The hail warranty: 1 inch, 15 years
This is the part Fort Worth owners need to read twice. Duro-Last’s Hail Warranty Requirements sheet (rev. 10/19/2023) says:
- Coverage is for hail up to 1 inch in diameter, on new construction, tear-off re-roofs and re-covers.
- 50 mil or thicker membrane, mechanically fastened or adhered.
- A Duro-Guard cover board (1/4” minimum, such as DensDeck, SECUROCK, DEXcell or HD ISO) or at least 1-1/2” of Duro-Guard ISO as the top layer.
- All insulation, cover board and adhesives bought from Duro-Last.
- The warranty is a maximum of 15 years and doesn’t include consequential damages.
Hail bigger than an inch is not unusual in North Texas. You can look up past hail reports for Tarrant County in NOAA’s Storm Events Database. A hail warranty is still worth having, but it’s not a promise that any storm is covered. Your building insurance is still the main protection, which is why we document every roof we inspect. See our commercial hail claims page.
Where Duro-Last fits, and where something else might
Good fits:
- Roofs with lots of penetrations, curbs and HVAC units, where prefabricated flashings save rooftop welding
- Restaurants and other buildings where grease or exhaust vents onto the roof, where PVC is commonly specified (we check the exhaust and the membrane’s chemical-resistance guidance first)
- Owners who want consequential damage coverage, which Duro-Last’s Supreme family offers
Worth comparing:
- TPO from Carlisle or Johns Manville, both brands we’re certified with, on big open warehouse roofs. See our TPO roofing page and Johns Manville guarantee post.
- Other PVC systems, such as Sika Sarnafil, which are field-welded from roll goods
- Coatings over a sound existing roof. See our TPO vs. modified vs. coating guide.
- Metal, including R-panel and standing seam from our own roll formers in 24 or 26 gauge
What we check before quoting a PVC roof in Fort Worth
- Core cuts to see what’s under the current roof, and whether a re-cover is allowed or a tear-off is needed
- Deck type and fastener pull-out, because warranty rules depend on it
- Rooftop equipment, grease exhaust, drains and parapets
- Which warranty you actually want (hail, high wind, consequential damage) and what it requires
- A free digital photo report
Commercial jobs can carry 10- and 20-year NDL warranties, and our workmanship warranty runs from 10 years up to lifetime, depending on the job. See our page on manufacturer NDL warranties.
After a storm
Get the roof inspected and documented before anyone patches it. In Texas you generally have 1 year from the date of loss to file a claim, but check your policy. See our storm damage page.
Talk to us about PVC in Fort Worth
We work on commercial buildings across Fort Worth, Arlington, North Richland Hills, Haltom City and Benbrook. See our Fort Worth commercial roofing and PVC roofing pages. We’re certified with GAF, CertainTeed, Owens Corning, Atlas, Johns Manville, Carlisle, Tropical Roofing Products, Mule-Hide and Enviroshake, and many other roof manufacturers. We’re BBB A+ rated, with 5.0 stars on Google at all three offices: Bridgeport, Decatur and Rhome. Request a free inspection or call (817) 733-9228.
