About PVC Roofing
PVC (polyvinyl chloride) is a single-ply thermoplastic roofing membrane installed with hot-air welded seams, the same welding method used on TPO. The difference is chemistry: PVC is plasticized rather than polyolefin-based, which gives it strong resistance to animal fats, cooking grease, oils, and many industrial chemicals, plus a long, documented weathering history on real roofs. Sika Sarnafil is the reference product in this category. Sika has been manufacturing PVC roofing membranes since the 1960s and publishes case histories on roofs that have been in service for decades. ADC Roofing installs Sika Sarnafil and Sikaplan systems along with the other major PVC lines, and we handle the full scope: core cuts and roof condition assessment, tear-off or recover, insulation and cover-board design, mechanically attached / fully adhered / RhinoBond induction-welded attachment, detail flashings, and manufacturer warranty registration. For most Dallas–Fort Worth buildings the honest answer is that both PVC and TPO can perform. We specify PVC when grease or chemical exposure is present, when the owner is holding the asset long term, or when the roof has a complex detail package that benefits from a membrane with a longer welded-detail track record.
Key Advantages
- Hot-air welded seams — monolithic, no adhesive seam tape
- Resists cooking grease, animal fats, oils, and many chemicals
- Highly reflective white membranes; cool-roof and LEED credit eligible
- 50, 60, 72, and 80 mil membranes; fleece-backed options for recover
- Mechanically attached, fully adhered, and induction-welded (RhinoBond) systems
- 20, 25, and 30-year NDL warranty options on qualifying assemblies
Manufacturers We Install
The original PVC roofing membrane, manufactured since the 1960s. Sarnafil G410 and S327 in reflective and custom colors, plus Décor simulated-standing-seam profiles.
Sika's value-engineered PVC line — same welding and detailing method, specified where budget is tighter than a full Sarnafil assembly.
Induction-welded attachment: plates are fastened through the insulation and welded to the membrane, with no fasteners penetrating the field sheet.
Liquid-applied membranes for restoration, congested rooftops, and details where a sheet system can't be cleanly terminated.
Best For
- Restaurants, commercial kitchens, and food processing — grease exhaust exposure
- Warehouses, retail centers, and office buildings held long term
- Roofs with heavy equipment, curbs, and complex flashing details
- Recover projects over existing metal or built-up roofs
- Owners pursuing cool-roof, Energy Star, or LEED performance credits
Why specifiers compare PVC to TPO
Sika publishes a comparison arguing that U.S.-manufactured TPO has gone through repeated reformulations while PVC has a longer, more consistent field record. These are Sika's positions, drawn from the sources they cite — we're passing them along so you can weigh them, not presenting them as our own testing.
- Accelerated aging is where the differences show. Sika cites SRI testing of 45 rolls across major TPO brands: thickness-above-scrim and weld strength were similar between brands, but heat aging, weathering, and weight-loss results — the tests most tied to long-term performance — varied significantly.
- Formulations have kept changing. Sika quotes General Motors' 2014 Facility Engineering Design Guide describing TPO as still experimental, in its second, third, or fourth generation of formulation, with inconsistent weathering-agent and fire-retardant ratios between manufacturers.
- Some specs cap TPO service life. Sika cites 2012 U.S. Department of Defense design criteria allowing TPO only on roofs with an anticipated life of ten years or less, and only at 72 mil minimum thickness.
- European FPO is not U.S. TPO. Sika notes that the high-quality flexible polyolefin it manufactures in Europe is a different product from the TPO sold in the U.S. market, and shouldn't be used to judge it.
The advice Sika closes with is the part we agree with most, quoting roofing consultant Carl Cash of Simpson, Gumpertz & Heger: the only rational way to select a roofing system is its past performance on roofs in the same climate as the new project. In Dallas–Fort Worth that means UV load, summer deck temperatures, and hail — and it's why we walk the existing roof and pull cores before recommending a membrane rather than defaulting to one product.
We install both. If TPO is the right call for your building and budget, see our TPO systems page. If grease exposure, chemical exposure, or a long hold period is in play, PVC is usually where we start.
Source: Sika — PVC vs. TPO. Claims and cited third-party documents on this page are Sika's, summarized here for comparison. ADC Roofing installs both PVC and TPO systems and has no exclusive relationship with any single-ply manufacturer.