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TPO Roofing — Reflective Single-Ply for Commercial Flat Roofs
Thermoplastic polyolefin single-ply membrane — the dominant commercial flat-roof system in North America. White reflective cool-roof surface, heat-welded seams that fuse two sheets into one, and 15-25 year No Dollar Limit system warranties from Carlisle, GAF, Firestone, Versico, and Johns Manville. We install all of them across CO, KS, MO, NE, and WY.
The Most-Installed Single-Ply Membrane on Commercial Flat Roofs Today
TPO — thermoplastic polyolefin — is a single-ply commercial roofing membrane manufactured in 10-foot-wide rolls, mechanically attached, fully adhered, or induction-welded to the deck, with adjacent sheets fused together by hot-air welding at roughly 1100°F. The result is a continuous waterproof surface with no field-applied seams that can cold-flow apart. White is the standard color because the reflective surface throws back 70-80% of solar load — the cool-roof benefit that drove TPO's adoption in the first place.
For most low-slope commercial buildings — retail strip centers, big-box, warehouse and distribution, multi-family, schools, medical office, light industrial — TPO is the right membrane for the right price. Where EPDM is the proven black-rubber workhorse and PVC is the chemical-resistance specialty, TPO sits in the middle with reflective performance, weldable seams, and price-competitive rolls from every major manufacturer.
We install TPO in 45, 60, and 80 mil thicknesses (60 mil is our default), in white, tan, and gray, and in fully-adhered, mechanically-attached, and RhinoBond induction-welded assemblies. The right combination is determined by deck type, wind zone, hail exposure, insulation strategy, and which manufacturer's NDL warranty tier the project is targeting.
Six TPO Systems We Install & Warranty
We're factory-certified across the major TPO manufacturers, which is what unlocks the top-tier NDL system warranty — the one that covers labor, not just material. Every line below is one we've installed on commercial projects across Colorado, Kansas, Missouri, Nebraska, and Wyoming.
Sure-Weld TPO
The category benchmark — broadest mil range, deepest warranty tier.
- Thickness45 / 60 / 80 / 90 mil
- ColorsWhite, tan, gray
- WarrantyUp to 30-yr Golden Seal NDL
- WindUp to FM 1-180 with cover board
- ApprovalsFM, UL, Miami-Dade, FBC
EverGuard TPO
GAF's flagship single-ply — commonly specified on commercial flat-roof systems.
- Thickness45 / 60 / 80 mil
- ColorsWhite, tan, gray
- WarrantyUp to 25-yr Diamond Pledge NDL
- WindUp to FM 1-150 standard
- Add-onEverGuard Extreme high-temp formula
UltraPly TPO
Firestone's reinforced TPO with the Red Shield warranty program.
- Thickness45 / 60 / 80 mil
- ColorsWhite, tan, gray
- WarrantyUp to 25-yr Red Shield NDL
- WindUp to FM 1-180 with assembly
- ProfileUltraPly Platinum higher-grade option
VersiWeld TPO
Carlisle's sister brand — same factories, same chemistry, often a better contract price.
- Thickness45 / 60 / 80 / 90 mil
- ColorsWhite, tan, gray
- WarrantyUp to 30-yr VIP NDL
- WindUp to FM 1-180 with cover board
- NoteSame TPO chemistry as Carlisle Sure-Weld
JM TPO
JM's reinforced TPO with Peak Advantage warranty for institutional commercial.
- Thickness45 / 60 / 80 mil
- ColorsWhite, tan, gray
- WarrantyUp to 25-yr Peak Advantage NDL
- WindUp to FM 1-180 with assembly
- Common pairJM polyiso + JM cover board
GenFlex TPO
Firestone-owned line — value-tier TPO for budget-driven commercial projects.
- Thickness45 / 60 / 80 mil
- ColorsWhite, tan, gray
- WarrantyUp to 20-yr NDL
- WindUp to FM 1-150 with assembly
- Best forLight commercial, budget retrofit
What Goes Under the Membrane
The TPO sheet gets the warranty — but the assembly underneath decides whether the roof drains, insulates, and lasts. We engineer the full stack, not just the top layer.
Polyiso Insulation & R-Value
Polyiso is the commercial workhorse: R-6.0 to R-6.5 per inch, lighter than mineral wool, and code-compliant across all five states we serve. We size insulation to the IECC 2021 requirement for the climate zone (Zone 5 for most of CO, Zone 4 for KC and Wichita, Zone 6 for Wyoming and Vail).
- Multiple staggered layers to break thermal bridging at board joints
- Continuous insulation values calculated to current IECC tables
- EPS or XPS specified where polyiso isn't compatible with the substrate
Tapered Polyiso for Drainage
Dead-flat decks pond water — and ponded water on a TPO seam is the fastest path to early failure. We design tapered polyiso systems (typically 1/4" or 1/2" per foot) with crickets and saddles behind every HVAC curb to direct water to drains, scuppers, or gutters. This is also where a lot of "old TPO that failed early" stories actually start: not bad membrane, just water that never had anywhere to go.
- 1/4" or 1/2" per foot taper depending on drain layout
- Crickets behind every roof-top unit, exhaust curb, and parapet penetration
- Scupper and drain sumps recessed into the tapered field
Cover Board for Hail & Wind
A high-density polyiso cover board (Carlisle SecurShield HD, GAF DensDeck Prime, JM ProtectoR HD) sits between the insulation and the membrane. Three jobs: impact resistance against hail, uplift resistance for FM-rated assemblies, and fire-rated separation required for Class A roof assemblies. On Front Range and east-Kansas hail jobs, we don't install TPO without it.
- 1/4" or 1/2" high-density polyiso, gypsum, or fiberboard
- Required by most manufacturers for top-tier NDL warranty
- Adds Class A fire rating to most assemblies
Attachment Method
Three ways to attach TPO; the right one depends on deck type, building height, wind exposure, and budget:
- Mechanically attached: screws + plates through the membrane at row spacing — fastest install, lowest cost, used on most warehouse and big-box retail.
- Fully adhered: bonded to insulation with low-VOC bonding adhesive — smoother appearance, less flutter, used where wind exposure is high or aesthetics matter.
- RhinoBond / induction welded: plates fastened below the membrane, then induction-welded to the bottom face — combines mechanical reliability with fully-adhered appearance. Premium spec for high-wind zones.
Edge Metal & Penetration Detail
The membrane field is the easy part. The roof leaks (when it leaks) at edges, parapets, scuppers, and curb penetrations. We install ANSI/SPRI ES-1 tested edge metal, fully welded TPO inside-corner and outside-corner pre-fab boots, and pourable sealer pockets at every irregular penetration. Edge metal cleat fastener spacing is to FM data sheet 1-49, not to "what we usually do."
- ANSI/SPRI ES-1 compliant edge metal & coping
- Pre-fabricated TPO boots on every pipe penetration
- Pourable sealer pockets where boot geometry won't seat
Cool Roof & Energy Performance
White TPO is an Energy Star-listed cool roof — SRI ~99-104, three-year aged reflectance still typically >0.55. On an air-conditioned commercial building in Denver, KC, or Omaha, replacing an aged dark-roof BUR with white TPO and continuous polyiso typically delivers 10-20% reduction in peak cooling demand. Combined with utility rebate programs (Xcel Energy, Evergy, KCP&L), the energy payback can offset a meaningful chunk of the membrane upcharge.
- Energy Star qualified (white TPO meets the cool-roof threshold)
- Title 24 / IECC 2021 compliant in all five states we serve
- Eligible for utility cool-roof rebates in select metros
45, 60, or 80 Mil — What Actually Goes On the Roof
Mil = thousandth of an inch. Thicker membrane is more puncture-resistant, lasts longer, and unlocks longer NDL warranty terms. Here's how we spec across our five-state footprint.
Light Commercial, Low Hail Exposure
The bare-minimum spec. Acceptable on warehouse interiors with limited foot traffic and low hail risk. Maximum 15-yr NDL warranty from most manufacturers. Cheapest membrane — we use it where the building is short-hold or budget-constrained, not as a default.
Standard Commercial, 20-yr Warranty Tier
The right answer on the average commercial flat roof. 50% thicker than 45 mil for ~10% more cost, unlocks 20-yr NDL on most manufacturer programs, and survives moderate hail when paired with a high-density cover board. Default spec on retail, office, multi-family, and most schools.
Long-Hold & High-Hail Buildings
The right call for hail corridors (Front Range CO, eastern KS), institutional long-hold (school districts, hospitals, municipal), and rooftops with chronic HVAC service traffic. 25-yr NDL warranty, hail riders available on most assemblies. Roughly 20% more than 60 mil — usually the right call where one big hail event would otherwise cost a full roof.
TPO Across CO, KS, MO, NE & WY
We install TPO in five states with very different climate stress profiles — and the spec genuinely changes between them. Here's how we adjust the assembly for each.
None of this is a sales argument for the most expensive system. It's just what the membrane and the cover board need to actually survive the place the building sits.
NDL Warranty Programs We're Certified to Register
Available only when installed by a factory-certified contractor — which we are for each program below.
Golden Seal & VIP NDL
Carlisle's flagship program. Up to 30-year No Dollar Limit covering material, labor, and approved accessories. Available on Sure-Weld and VersiWeld assemblies installed by Carlisle Authorized contractors. Wind, hail, and high-temp riders available.
Diamond Pledge & Well Roof
GAF's top-tier commercial NDL program. Up to 25 years on EverGuard TPO assemblies, including full system coverage on insulation, cover board, fasteners, and edge metal. Available only through GAF Master Select Commercial contractors.
Red Shield & Peak Advantage
Firestone Red Shield: up to 25-yr NDL on UltraPly TPO. JM Peak Advantage: up to 25-yr NDL on JM TPO with JM polyiso and cover board. Both programs include labor, both require factory-certified installation, both include hail and wind rider options.
When TPO Isn't the Right Call
TPO is the default for most commercial flat roofs — but not all of them. We'll talk you out of it when something else fits the building better. Honest scope is more valuable than locked-in product loyalty.
Each of these scenarios has a better answer in our catalog — and we install it.
- Restaurants, food prep, industrial solvents Grease and certain chemicals will degrade TPO over time. PVC single-ply has stronger chemical resistance — the right call for rooftop grease exhaust, hospital plant rooms, and light industrial.
- Heavy rooftop foot traffic / mechanical decks Constant wheel and foot traffic abrades single-ply membrane. Modified bitumen with a granulated cap sheet handles traffic better. Or specify walkway pads on the TPO traffic paths.
- Aged but structurally-sound commercial roof If the field is intact and only the seams are leaking, a silicone restoration coating is dramatically cheaper than tear-off and buys 10-20 more years.
- Long-hold institution targeting 40+ year service School district, municipal, hospital with no plan to re-roof for 40 years — commercial standing seam metal beats any membrane on dollars-per-year service life.
- Severely under-insulated existing roof If the deck and existing assembly are sound but R-value is 1980s-spec, spray polyurethane foam (SPF) with topcoat adds R-6.5 per inch of continuous insulation — better thermal payback than TPO over the same insulation.
Related Commercial Roofing Pages
EPDM Rubber Membrane
Black-rubber commercial single-ply — the proven workhorse, especially in cold climates.
View → Restoration PathCommercial Roof Coatings
Silicone, acrylic, polyurethane — restore an aged TPO instead of tearing it off.
View → Insulation AddCommercial Foam Coating
SPF plus silicone topcoat — adds continuous insulation while restoring the roof.
View → OverviewCommercial Roofing
The full commercial roofing catalog — TPO, EPDM, modified bitumen, metal, BUR.
View → Keep It WarrantedCommercial Maintenance
Semi-annual inspection & repair program — required to keep most NDL warranties in force.
View → Storm DamageCommercial Insurance Claims
Hail, wind, or storm damage on a commercial flat roof — we document and file.
View → Long-Life AlternativeStanding Seam Metal
For commercial slope where 40+ year service is the goal — metal beats membrane.
View → Multi-FamilyHOA & Multi-Family
TPO on apartment, condo, and HOA flat-roof buildings — capital planning fit.
View →Get a Free TPO Estimate
We'll walk the roof, core-sample the existing assembly where the moisture survey flags wet insulation, verify the deck condition, and write an itemized scope with full warranty options laid out side-by-side. We're not the cheapest TPO contractor in the five-state — we're the right call when you need the spec to match the building, the install to match the manufacturer's schedule, and the warranty to actually file when the time comes.
What We Bring to the Walk
- Moisture Survey Infrared scan or capacitance meter to map wet insulation before we propose a scope.
- Core Cuts Physical verification of insulation depth, layers, and substrate at representative locations.
- Drone Photo Set Full roof photo documentation with annotated penetration and seam-condition map.
- Side-by-Side Spec 60 mil vs 80 mil, mechanical vs adhered, 20-yr vs 25-yr NDL — honest cost-and-coverage comparison.