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How to Choose a Commercial Roofing System

By Best Colorado Roofing Published November 5, 2026 Commercial Roofing

Six credible systems, one roof. Choosing a commercial roofing system is a 20-year decision made of trade-offs — here's how to weigh membrane types against your building's reality in Colorado.

The options on the table

TPO: White, reflective, heat-welded seams. The default for new Colorado commercial roofs. Strong all-around performer.
EPDM: Black rubber, longest proven track record, simple repairs, stays flexible in cold.
PVC: The grease/chemical specialist — restaurants and industrial. Premium price.
Modified bitumen: Multi-ply asphalt rolls; tough under foot traffic; good for smaller roofs.
BUR (built-up): Layered asphalt-and-felt 'tar and gravel'; proven but heavy and labor-intensive — mostly a replacement-market system now.
Coatings: Liquid-applied restoration over a sound existing roof — life extension, not a new roof.

Deep dives: TPO vs. EPDM for commercial buildings, what PVC commercial roofing is, modified bitumen, roof coating systems.

Decision criteria

Building use: Restaurant? PVC. Warehouse? TPO or EPDM. Small office? Mod-bit may win on cost.
Climate zone: High-mountain cold favors EPDM's flexibility; high-UV Front Range favors white reflectives; hail exposure argues for thicker membranes (60/80-mil).
Foot traffic: Regular HVAC service traffic favors tougher multi-ply or walk-pad-protected single-ply.
Budget horizon: Coating defers capital spend 10–15 years; full systems reset the clock 20–30.
Energy: White reflectives cut cooling loads on air-conditioned buildings.
Existing roof: What's up there, and is it dry? A core sample answers both.

Talk to a Colorado roofer. Choosing a system for your building? One call connects you with an independent commercial roofing professional who can core-sample your roof and recommend the right system.

Mistakes to avoid

Choosing on price alone: The cheapest system with the cheapest installer is how roofs fail at year 8.
Ignoring the installer: System quality means little without a contractor experienced in that specific system — verify with questions to ask a commercial roofing contractor.
Skipping the core cut: Designing a system without knowing the existing assembly's condition is guessing.
Forgetting drainage: No membrane survives bad drainage. Fix slope and drains as part of the project — see why proper roof drainage matters.

FAQs

What's the most popular commercial roofing system in Colorado?

TPO dominates new commercial installations statewide — white, reflective, weldable, and well-suited to Colorado's UV and hail. But 'most popular' isn't 'best for your building.'

Can I mix systems on one building?

Different sections can use different systems (e.g., TPO field with PVC at the kitchen exhaust), but transitions must be properly detailed. Discuss with the designer.

How thick should the membrane be?

60-mil is the common commercial standard; 80-mil adds puncture and hail resistance for high-traffic or hail-exposed roofs. Thicker is cheap insurance on a 20-year asset.

Get a system recommendation for your building

One call connects you with an independent commercial roofing professional for an honest, building-specific system recommendation.

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