Roofing comparison

TPO vs. PVC roofing

Compare the two options against the same roof, base construction, installer responsibilities, warranty path, and total proposal.

Author: By At-Cost Roofing editorial team
Editorial review: Organization editorial review complete
Dates: Published August 31, 2026 · Updated August 31, 2026

Official records, labeled calculations, and evidence limits follow our editorial methodology.

Compare against a real roof

Side-by-side evidence

Actual differences on the same criteria

Criterion	GAF EverGuard TPO Smooth 60 mil	GAF EverGuard PVC-KEE Smooth 60 mil	Why it matters
Formulation	Thermoplastic polyolefin with inherent flexibility and no plasticizers	PVC with solid KEE plasticizer in the membrane core	The polymers and their compatible accessories are not interchangeable.
Heat-welded assembly	TPO-compatible sheet, flashing, and accessories under the shared system manual	PVC and PVC-KEE-compatible sheet, flashing, and accessories under the shared system manual	Similar welding does not permit mixing formulations or repair materials.
Chemical exposure	Assigned record establishes no special grease, animal-fat, fuel, or chemical-resistance advantage	Publishes enhanced resistance to grease, animal fats, jet fuel, and other chemicals	This is the clearest evidence-backed reason to prefer the PVC-KEE product.
Project evidence: warranty eligibility	Obtain the warranty document for the exact TPO assembly and installer before assigning coverage	Obtain the warranty document for the exact PVC-KEE assembly, installer, and known exposure before assigning coverage	At-Cost comparison method: keep product resistance claims separate from project-specific warranty eligibility.
Reflective surface	The exact TPO color and current rating must be selected	The exact PVC-KEE color and current rating must be selected	Energy outcome depends on climate, insulation, roof assembly, and building operation rather than membrane color alone.
Future repair	Requires compatible TPO membrane, flashing stock, preparation, and trained service	Requires compatible PVC-KEE membrane, flashing stock, preparation, and trained service	The ownership plan should identify who can make formulation-compatible repairs.

Criterion

Formulation

GAF EverGuard TPO Smooth 60 mil: Thermoplastic polyolefin with inherent flexibility and no plasticizers
GAF EverGuard PVC-KEE Smooth 60 mil: PVC with solid KEE plasticizer in the membrane core
Why it matters: The polymers and their compatible accessories are not interchangeable.

Criterion

Heat-welded assembly

GAF EverGuard TPO Smooth 60 mil: TPO-compatible sheet, flashing, and accessories under the shared system manual
GAF EverGuard PVC-KEE Smooth 60 mil: PVC and PVC-KEE-compatible sheet, flashing, and accessories under the shared system manual
Why it matters: Similar welding does not permit mixing formulations or repair materials.

Criterion

Chemical exposure

GAF EverGuard TPO Smooth 60 mil: Assigned record establishes no special grease, animal-fat, fuel, or chemical-resistance advantage
GAF EverGuard PVC-KEE Smooth 60 mil: Publishes enhanced resistance to grease, animal fats, jet fuel, and other chemicals
Why it matters: This is the clearest evidence-backed reason to prefer the PVC-KEE product.

Criterion

Project evidence: warranty eligibility

GAF EverGuard TPO Smooth 60 mil: Obtain the warranty document for the exact TPO assembly and installer before assigning coverage
GAF EverGuard PVC-KEE Smooth 60 mil: Obtain the warranty document for the exact PVC-KEE assembly, installer, and known exposure before assigning coverage
Why it matters: At-Cost comparison method: keep product resistance claims separate from project-specific warranty eligibility.

Criterion

Reflective surface

GAF EverGuard TPO Smooth 60 mil: The exact TPO color and current rating must be selected
GAF EverGuard PVC-KEE Smooth 60 mil: The exact PVC-KEE color and current rating must be selected
Why it matters: Energy outcome depends on climate, insulation, roof assembly, and building operation rather than membrane color alone.

Criterion

Future repair

GAF EverGuard TPO Smooth 60 mil: Requires compatible TPO membrane, flashing stock, preparation, and trained service
GAF EverGuard PVC-KEE Smooth 60 mil: Requires compatible PVC-KEE membrane, flashing stock, preparation, and trained service
Why it matters: The ownership plan should identify who can make formulation-compatible repairs.

Put both bids on the same baseline

Compare deck investigation, insulation, cover board, attachment, membrane thickness and reinforcement, seams, drains, curbs, penetrations, edge metal, access, inspection, repair plan, and warranty.

Advantages and drawbacks

GAF EverGuard TPO Smooth 60 mil advantages: A named reinforced thermoplastic polyolefin sheet with no plasticizers and compatible TPO flashing and accessory paths in the shared GAF system manual.
GAF EverGuard TPO Smooth 60 mil drawbacks: The assigned TPO record does not establish the enhanced grease, animal-fat, jet-fuel, or chemical-resistance claim published for PVC-KEE.
GAF EverGuard PVC-KEE Smooth 60 mil advantages: A named PVC sheet with solid KEE plasticizer and published enhanced resistance to grease, animal fats, jet fuel, and other chemicals.
GAF EverGuard PVC-KEE Smooth 60 mil drawbacks: Project evidence required: obtain the exact warranty document before treating the published chemical-resistance statement as coverage for a known exposure.

Choose GAF EverGuard TPO Smooth 60 mil when

Choose TPO when no special chemical exposure is identified and the complete 60-mil TPO assembly, attachment, trained installer, drainage, repair plan, warranty path, and quote fit.

Choose GAF EverGuard PVC-KEE Smooth 60 mil when

Choose PVC-KEE when a documented exposure makes its published resistance relevant and the complete PVC-compatible assembly, installer, repair stock, warranty limits, and quote are accepted.

Choose neither when

Choose neither until drainage, deck, insulation, cover board, attachment, penetrations, edge details, membrane-compatible accessories, installer eligibility, and comparable prices are specified.

What this comparison cannot decide

Both surfaces can be light-colored and heat-welded, but color does not make the systems interchangeable. Verify formulation, compatibility, attachment, details, and repair materials.

Evidence boundary

The cited GAF records support a 60-mil TPO-to-PVC-KEE comparison and the stated chemical-resistance boundary. They do not design this low-slope assembly, guarantee an exposure outcome, cover excluded chemicals, confirm installer eligibility, or provide matched project prices.

Common questions

Answers to check before you decide

What must match before comparing TPO vs. PVC roofing?

At-Cost comparison method: Compare deck investigation, insulation, cover board, attachment, membrane thickness and reinforcement, seams, drains, curbs, penetrations, edge metal, access, inspection, repair plan, and warranty.

What can this comparison not decide?

At-Cost comparison boundary: Both surfaces can be light-colored and heat-welded, but color does not make the systems interchangeable. Verify formulation, compatibility, attachment, details, and repair materials.

Keep reading

Related guide

TPO vs. PVC roofing

Source record

Actual differences on the same criteria

Formulation

Heat-welded assembly

Chemical exposure

Project evidence: warranty eligibility

Reflective surface

Future repair

Put both bids on the same baseline

Advantages and drawbacks

Choose GAF EverGuard TPO Smooth 60 mil when

Choose GAF EverGuard PVC-KEE Smooth 60 mil when

Choose neither when

What this comparison cannot decide

Evidence boundary

Answers to check before you decide

Keep reading

GAF EverGuard 60-mil PVC-KEE review

GAF EverGuard 60-mil TPO review

Low-slope membrane roof cost

Modified-bitumen roofing for residential low-slope roofs