Statewide California · Welded-Seam Single-Ply Systems
TPO, PVC & EPDM Single-Ply Roofing for California Commercial Buildings
The three most common commercial low-slope roofing membranes, installed and repaired statewide — matched to your building, your climate zone, and California's Title 24 reflectivity requirements.
TPO, PVC, and EPDM together make up the overwhelming majority of low-slope commercial roofing installed in California, and each has a genuinely different profile — not just a different price tag. Choosing between them isn't about which is universally "best," it's about matching membrane chemistry, seam technology, and reflectivity to your building's specific exposure, budget, and code requirements. We install and repair all three, which means our recommendation isn't steered by only stocking one system.
TPO and PVC are both heat-welded, white, and highly reflective — a strong natural fit for California's Title 24 Part 6 cool-roof requirements — while EPDM is a rubber membrane prized for durability and field-repairability, with a white variant available where reflectivity is required. All three can be specified in a thickness and finish that meets Title 24 when the color and reflectance values are selected correctly.
California's climate range shapes this decision more than in most states. Inland Central Valley and Inland Empire buildings face sustained UV exposure and wide daily temperature swings that stress membranes and seams harder than the same materials experience on the coast under a marine layer. We factor that regional exposure into both material and thickness recommendations rather than defaulting to a single statewide spec.
Installation quality matters as much as the membrane brand you choose. A hot-air or hot-wedge welded TPO or PVC seam, done correctly, is often stronger than the membrane field itself — but a rushed or improperly heated weld is one of the most common causes of premature single-ply failure statewide. We run quality-control checks on seam welds as work progresses rather than only at final walkthrough, which catches a bad weld while it's still an easy fix instead of a future leak call.
We install and repair single-ply systems on warehouses, distribution centers, retail and office buildings, manufacturing facilities, and multi-tenant commercial properties statewide. Whether the project is a new construction installation, a recover over an existing sound roof, or a targeted seam repair on an aging system, the same welding standards and reflectivity documentation apply — and we give you a written, material-specific proposal rather than a generic single-ply line item.
Material Comparison
TPO vs. PVC vs. EPDM — the real tradeoffs
TPO (Thermoplastic Polyolefin)
A white, heat-reflective single-ply membrane with heat-welded seams, TPO is the most commonly specified system on new commercial low-slope roofs today — a strong balance of cost, reflectivity, and performance. Typical service life runs roughly 15-25 years, and its reflective white finish naturally supports Title 24 compliance.
PVC (Polyvinyl Chloride)
PVC shares TPO's white, heat-welded, reflective profile but adds stronger chemical and grease resistance — a common reason it's specified for restaurants, food processing, and any building with rooftop grease exhaust that would degrade a lesser membrane over time. Typical service life runs roughly 20-30 years.
EPDM (Ethylene Propylene Diene Monomer)
EPDM is a rubber membrane, traditionally black, known for durability, strong puncture and impact resistance, and simple field repairs that don't require heat-welding equipment. White EPDM is available for reflectivity-sensitive applications. Typical service life runs roughly 20-35 years, among the longest of the single-ply systems.
What We Do
Installation, recover, and repair for every single-ply system
New Installation
Full single-ply system installation on new construction or full tear-off replacement projects.
Recover Installation
A new membrane installed over a sound, dry existing roof — faster and less costly than a tear-off where conditions allow.
Seam & Membrane Repair
Heat-welded seam repair, membrane patching, and flashing repair on existing TPO, PVC, or EPDM roofs.
Title 24 Compliant Specification
Membrane color and reflectivity specification built to meet California energy-code requirements from the start.
Which Membrane Fits Your Building
A practical decision guide, not a one-size-fits-all pitch
Choose TPO if...
You want the most commonly specified, cost-effective reflective membrane for a straightforward low-slope commercial building without unusual chemical exposure — a strong default for most warehouses, retail, and office buildings statewide.
Choose PVC if...
Your building has rooftop grease exhaust (restaurants, food processing, commercial kitchens) or any chemical exposure that would degrade a standard membrane faster — PVC's chemical resistance is the deciding factor here, not just cost.
Choose EPDM if...
Durability and simple, low-cost field repairs matter more than maximum reflectivity, or the roof has heavy foot traffic and equipment loading where puncture resistance is a priority — common on industrial buildings with frequent rooftop maintenance access.
Choose a Thicker Membrane if...
Your building sits inland — Central Valley, Inland Empire, or similar heat-cycling climates — where a 60-80 mil membrane will simply outlast a standard 45-mil sheet under sustained UV and thermal stress.
These are starting points, not a substitute for a site walk — roof geometry, existing deck condition, budget, and how long you plan to hold the property all factor into the final recommendation. Our free inspection gives you a specific membrane, thickness, and color recommendation in writing, matched to your building rather than a generic statewide default.
Built for California, Specifically
How climate and code shape single-ply material selection
UV Exposure & Daily Heat Cycling
Thicker single-ply membranes — 60 to 80 mil rather than the thinner 45-mil grade — generally hold up better under California's intense UV exposure and daily heat cycling, particularly in inland Central Valley and Inland Empire climates where a roof can swing from triple-digit surface temperatures at midday to a sharp overnight drop. We spec thickness based on where the building actually sits, not a single statewide default.
Title 24 Reflectivity
TPO and PVC's naturally white, reflective finish makes them a straightforward fit for California's Title 24 Part 6 solar reflectance and thermal emittance requirements on most low-slope commercial re-roofs. White EPDM can also meet reflectivity thresholds; standard black EPDM typically requires a reflective coating to comply where Title 24 applies to the project.
Coastal Marine-Layer vs. Inland Performance
A membrane on the coast under a persistent marine layer ages differently than the same product inland — less UV and thermal cycling stress, but more sustained moisture exposure and salt-air corrosion risk on metal flashing and fasteners. We adjust seam-welding technique, fastener spec, and flashing detail by region.
Seam Welding Quality Over Time
TPO and PVC seams are hot-air or hot-wedge welded into a single homogenous sheet — done correctly, the seam is often stronger than the membrane field itself. Poor welding technique is one of the most common causes of premature single-ply failure, which is why seam quality control matters as much as membrane brand selection.
Related Services
Single-ply connects to a few other pages worth a look
Statewide Single-Ply Installation
TPO, PVC & EPDM roofing installed and repaired across every major California region
Our welded-seam crews and material selection process are consistent statewide, from coastal marine-layer buildings to the inland heat-cycling climates of the Central Valley and Inland Empire.
Frequently Asked Questions
Single-ply questions we hear most
What's the difference between TPO, PVC, and EPDM roofing for a commercial building?
TPO and PVC are both white, heat-reflective single-ply membranes with heat-welded seams; PVC offers stronger chemical resistance and is often preferred for buildings with rooftop grease exhaust. EPDM is a black or white rubber membrane known for durability and simple field repairs. All three can meet Title 24 reflectivity requirements when specified in a compliant color and finish.
How long does a commercial roof last in California?
Lifespan varies by material and climate zone: roughly 15-25 years for TPO, 20-30 years for PVC, 20-35 years for EPDM, and 40+ years for standing seam metal — coastal marine-layer climates are typically gentler on membranes than inland heat-cycling zones like the Central Valley.
What roofing systems hold up best against California's UV exposure and heat cycling?
Thicker single-ply membranes (60-80 mil) and reflective white/light-colored finishes generally hold up better under California's intense UV exposure and daily heat cycling, particularly in inland Central Valley and Inland Empire climates.
What is Title 24 and does it apply to my commercial roof?
Title 24 Part 6 is California's energy code, which sets solar reflectance and thermal emittance requirements for low-slope nonresidential roofs. It applies to most new commercial roof installations and many re-roofing or recover projects — our team confirms applicability and compliance requirements as part of every project scope.
Not sure which membrane fits your building?
Call 844-967-5247 or request a free quote online — we'll respond within 1 business day.