Frisco keeps adding offices, medical buildings, retail centers and restaurants, and many of them have low-slope roofs where the membrane choice matters for decades. Owners and property managers often ask me about Sika Sarnafil PVC, so here’s what it is and when it makes sense.
I’m Blake Snow. I’ve been roofing for 30 years, including commercial roofs across DFW. We install single-ply systems to manufacturer specs by certified installers, and every fact below comes from Sika’s own documents.
What Sarnafil is
Sarnafil is Sika’s PVC single-ply membrane line. The sheets are joined by hot-air welding, so the seams fuse into the membrane instead of relying on adhesive or tape. Sika’s data sheets describe the membrane as high-quality PVC with UV stabilizers, flame retardant and reinforcement, with a lacquer coating on the top surface.
G410 vs. S327
| Sarnafil G410 | Sarnafil S327 | |
|---|---|---|
| Reinforcement | Fiberglass | Polyester |
| Typical system | Adhered | Mechanically attached |
| Thickness options (per Sika’s warranty guide) | 60, 72, 80 mil | 60, 72, 80 mil |
Sources: Sika’s Sarnafil G 410-60 data sheet, the G 410-72 and G 410-80 pages, and the Sika Roofing Warranty Selection Guide (12/13/2024).
Thickness: what you’re paying for
Sika publishes these minimums for G410:
| Membrane | Overall thickness (min.) | Thickness above scrim |
|---|---|---|
| G 410-60 | 60 mil | 27 mil |
| G 410-72 | 72 mil | 35 mil |
| G 410-80 | 80 mil | 40 mil |
The industry spec (ASTM D4434 Type II) only calls for 45 mil overall and 16 mil above the scrim, per Sika’s sheets. The “above the scrim” number matters most. That’s the layer of PVC protecting the reinforcement from sun, foot traffic and hail. On a Frisco roof with lots of rooftop equipment and service traffic, I lean toward 72 or 80 mil.
Warranty terms
According to Sika’s warranty guide:
- 60 mil G410 or S327: 5 to 15 years, or 20 years
- 72 mil: up to 25 years
- 80 mil: up to 30 years
Every warranty depends on meeting Sika’s deck, securement and system requirements, and products must be bought through Sika. Sika issues the warranty to the building owner through a Sika Authorized Applicator after the finished roof meets its requirements. Ask for the warranty language in writing before you sign any contract.
Hail coverage on Frisco roofs
Frisco gets serious hail. Sika’s guide lists hail coverage options tied to the membrane, thickness, system and warranty term, and some require a gypsum cover board under the membrane. Hail coverage has to be designed into the roof from day one. If hail coverage matters to your lender, owner or tenant, tell us at the start so the assembly is specified for it.
When PVC beats TPO, and when it doesn’t
- PVC makes sense on restaurants and food service, buildings with kitchen exhaust or grease, and owners who want a long-term, heat-welded system with a higher warranty term.
- TPO is often the better value on plain office and warehouse roofs. See our TPO roofing page and our post on Johns Manville TPO and PVC guarantees in Frisco.
- A coating may be enough if the existing roof is sound and dry. See commercial roof coatings.
We’re certified with Carlisle, Johns Manville and Mule-Hide for single-ply systems, so we can quote more than one manufacturer on the same building.
What we do on a Frisco commercial roof
- Core cuts and a moisture check before we recommend replacement, recover or coating
- Tapered insulation and drainage fixes where water ponds
- Heat-welded seams, new edge metal and flashings at curbs and walls
- A digital photo report, plus commercial 10- and 20-year NDL warranties available on qualifying systems
See our PVC roofing and Frisco commercial roofing pages.
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. Our commercial hail damage claims page explains the process.
Talk to us about PVC in Frisco
We roof offices, retail centers, restaurants and churches in Frisco, Prosper, Plano, McKinney and across DFW. 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.
