6 Types of Commercial Roofing Systems

If you’re responsible for a commercial building, choosing the right roofing system can feel overwhelming. You’re likely asking: What’s the best roof for my property? How much will it cost? Will it hold up over time?

At Weather Shield Roofing Systems™, we’ve been helping businesses make smart roofing decisions for over 40 years. That’s why we’ve created this straightforward guide to help you compare the 6 types of commercial roofing systems, so you can feel confident about protecting your building, your investment, and your peace of mind.

Spray Polyurethane Foam (SPF) Roofing

First on the list is SPF roofing, a system that starts as a liquid and expands into a solid, forming a seamless, insulated barrier across your roof. It’s one of the most energy-efficient options available today.

Typical Cost: $5–$10 per square foot
Lifespan: 30–50+ years with proper maintenance

Why building owners like SPF:

• Provides the highest R-value per inch, meaning excellent insulation

• Creates a seamless, waterproof membrane

• Can be applied over many existing roofs with little or no tear-off

• Renewable: re-coating can extend life at about 33–50% of the original cost

Bottom line: If reducing energy costs and extending your roof’s life are top priorities, SPF may be the best commercial roofing system for you.

Single-Ply Membranes (TPO/EPDM)

Next up, we have single-ply membrane systems like TPO and EPDM. These are widely used on flat or low-slope commercial roofs. They come in large rolls of rubber or synthetic material, and contractors typically install them using adhesives, fasteners, or ballast.

Typical Cost:

• EPDM: $6–$10 per square foot

• TPO: $8–$10 per square foot
  Lifespan: 20–30 years

Why property managers trust single-ply roofs:

• Proven track record: EPDM has been around for decades

• TPO reflects heat; EPDM absorbs it—offering flexibility based on your climate needs

• Lightweight and easy to install

• Compatible with various types of insulation

In summary: If you’re looking for a time-tested and cost-effective roofing solution, single-ply membranes could be ideal.

Silicone Roof Coating

Another cost-effective choice is silicone roof coatings. These coatings can extend the life of your roof and do so at a significantly lower cost than a full replacement. They seal and protect existing commercial roofs by forming a fluid-applied membrane.

Typical Cost: $4–$8 per square foot
Lifespan: 10–20 years (can be recoated)

Why building owners consider silicone coatings:

• They don’t count as a new roof under building codes (important for reroofing regulations)

• Seamless and waterproof

• Reflect sunlight, helping lower cooling costs

• Renewable: coatings can be reapplied to extend roof life

However, they work best when less than 25% of the insulation is wet and seams are still intact. So, if your current roof isn’t failing but needs a boost, this could be a smart solution.

Metal Roofing

Metal roofing is another strong contender. These systems are known for their strength, durability, and long-term performance. They’re often used on sloped commercial buildings and, in many cases, can be installed over your existing roof.

Typical Cost: $10–$15 per square foot
Lifespan: 40–70 years or more

Why investors choose metal roofing:

• Excellent resistance to wind, snow, and fire

• Low maintenance and long-lasting

• Recyclable and environmentally friendly

• Available in many styles and colors to match building aesthetics

Even though the upfront cost is higher, the lifespan and durability make metal a solid long-term investment.

Shingle Roofing

Although shingles are more commonly seen on homes, they can still be a good fit for certain commercial buildings—especially those with steep-slope roofs like churches, schools, or apartment complexes.

Typical Cost: $2.50–$5.00 per square foot
Lifespan: 15–30 years (depending on shingle type)

Why some commercial properties use shingles:

• A wide variety of color and design options

• Hail-rated and high-durability options available

• Easy to repair localized damage

Therefore, if your commercial roof has a steep pitch and you’re seeking an affordable, attractive solution, shingles could be a smart fit.

Built-Up Roofs (BUR)

Lastly, let’s talk about built-up roofing systems, also known as tar-and-gravel roofs. These have been around for more than 100 years and are still used in some commercial settings. They involve layering asphalt or tar with roofing felt and finishing with a protective layer of gravel.

Typical Cost: $5–$8 per square foot
Lifespan: 20–30 years

Why they’ve been used (and why they’re fading out):

• Seamless and waterproof when properly installed

• Provide UV protection and fire resistance

• Require minimal maintenance

That said, modern systems like spray foam and single-ply membranes often outperform BUR systems. They require less labor, reduce roof weight, and provide better efficiency. As a result, many property owners are moving away from them.

How Do I Know Which of the 6 Types of Commercial Roofing Systems Is Best for My Property?

Ultimately, it depends on your roof’s condition, your budget, and your long-term goals.

Ask yourself:

• Is my roof flat or sloped?

• Am I more concerned with upfront cost or long-term savings?

• Do I need a renewable solution or a new roof altogether?

• Is energy efficiency a priority?

At Weather Shield Roofing Systems™, our expert team takes the time to understand your building, answer your questions, and provide honest, straightforward recommendations. Whether you’re considering spray foam, single-ply membranes, roof coatings, metal, shingles, or built-up systems, we’ll help you make a choice you can feel good about for years to come.

We’re here to help you protect your investment with transparent advice and cost-efficient solutions. Contact us today!

Kyle Bruinsma

Account Executive

Since 2019, Kyle Bruinsma has delivered high-quality, cost-effective commercial roofing solutions at Weather Shield Roofing Systems. As both a roofing professional and commercial property investor, he brings a unique perspective to each project—treating every building like his own. Kyle values the strong team culture at Weather Shield, where everyone works together to keep customers dry.