TPO, EPDM, or Metal? Choosing the Right Commercial Roofing System for Durability and Budget

Commercial buildings don’t just need roofs, they need long-lasting, energy-efficient systems that hold up under foot traffic, extreme weather, and long-term wear. Whether you're managing an office park, retail space, or industrial facility, understanding your options, like TPO and EPDM roofing, or metal roofing for commercial buildings, can help you make a cost-effective decision that saves on maintenance and utility bills down the line.

This blog breaks down the pros, cons, and price points of these popular commercial roofing systems, and also tells which type you currently have and whether it can be repaired or needs replacing.

What Is the Difference Between TPO and EPDM Roofing?

Both TPO and EPDM roofing are types of single-ply membrane roofing systems, ideal for flat or low-slope commercial roofs. But they differ in material, performance, and price.

• TPO (Thermoplastic Olefin) is a white, reflective membrane that helps reduce cooling costs. It’s heat-welded at the seams and resists UV rays, chemicals, and punctures well.

• EPDM (Ethylene Propylene Diene Monomer) is a black rubber membrane known for flexibility and weather resistance. It's often installed using adhesives or ballast and is especially good in colder climates.

But it depends on your needs. TPO is often favoured for energy efficiency in hotter regions like Texas, while EPDM is easier to repair and typically lasts longer in areas with freeze-thaw cycles.

Do I Have a TPO or EPDM Roof?

You don’t need to be a roofer to figure this out. Here are a few things:

• Colour: TPO is usually white or light grey. EPDM is almost always black.

• Texture: EPDM feels more like a thick rubber tire; TPO feels stiffer and more plastic-like.

• Installation clues: TPO has seams that are heat-welded. EPDM seams are often glued or taped.

If you're still unsure, a professional inspection can confirm your roof type, which is essential before planning repairs or replacement.

How Much Does TPO or EPDM Roofing Cost?

Costs vary based on the size of the roof, labour, and access. On average:

• TPO roofing: $5.50 – $9 per square foot installed

• EPDM roofing: $4.50 – $8 per square foot installed

TPO generally costs a bit more upfront, but can save you money on energy bills in hot climates.

Can an EPDM Roof Be Repaired?

Absolutely. EPDM is known for being repair-friendly. Small punctures or tears can be patched with EPDM-compatible repair tape or liquid rubber products. Even seams can be resealed without replacing large sections.

However, if the rubber is shrinking or pulling away at edges, often seen after 20+ years of exposure, it may be time to consider a re-roof.

What Type of Metal Roofing Is Best for Commercial Buildings?

If you’re leaning toward metal roofing, there are a few options worth comparing:

• Standing seam metal roofs: Long vertical panels with concealed fasteners. Extremely durable and low maintenance.

• Corrugated metal panels: Wavy sheets that are more affordable but offer less weather resistance.

• Metal shingles or tiles: Provide aesthetics similar to traditional shingles, often used on mixed-use or high-end commercial properties.

Which type is best? For pure durability and weatherproofing, standing seam systems are hard to beat. They handle heavy rain, wind, and thermal movement with ease.

What’s the Best Roof for a Commercial Building?

There’s no universal answer, but here’s a thing based on priorities:

• Best for energy efficiency: TPO

• Best for cost-effectiveness: EPDM

• Best for long-term durability: Standing seam metal

• Best for aesthetics: Metal tiles or shingles

• Best for easy repair access: EPDM

• Best for flat roofs: TPO or EPDM

• Best for pitched roofs: Metal

Your ideal choice may depend on roof slope, climate, traffic, and even local fire code requirements.

How Costly Is a Metal Roof for a Commercial Building?

Metal roofing for commercial buildings ranges from $7 to $15 per square foot installed, depending on the type and finish. While it’s more expensive upfront than membranes like TPO or EPDM, the lifespan (40–70 years), resistance to fire and wind, and minimal maintenance needs can make it a worthy long-term investment.

Final Thoughts

Choosing between TPO and EPDM roofing, or opting for metal roofing for commercial buildings, isn’t just about the lowest cost; it’s about total value over time. With the right materials and installation, your commercial roof can deliver decades of protection, energy savings, and peace of mind.

If you're evaluating your next project or are unsure which system is already in place, call Integrity First Roofing & Construction to compare options and ask detailed questions before signing any contract.