Commercial Flat Roof Types: Pros, Cons & Best Applications

Choosing the right flat roof system for your commercial building is one of the most important decisions you'll make. Each system has strengths and weaknesses depending on your building type, budget, and long-term goals.

EPDM (Rubber) Roofing

What it is: Single-ply rubber membrane, typically black or white.

Pros:

• Proven 40+ year track record
• Excellent flexibility in cold weather
• Low material cost
• Easy to repair

Cons:

• Black absorbs heat (unless white version used)
• Seams can fail over time
• Susceptible to punctures

Best for: Budget-conscious projects, northern climates

TPO Roofing

What it is: Thermoplastic single-ply membrane, typically white.

Pros:

• Energy efficient (reflective white surface)
• Heat-welded seams are very strong
• Good chemical resistance
• Competitively priced

Cons:

• Relatively new (less long-term data)
• Quality varies by manufacturer
• Can become brittle over time

Best for: Energy-conscious buildings, new construction

PVC Roofing

What it is: Thermoplastic single-ply membrane with superior chemical resistance.

Pros:

• Excellent chemical resistance
• Heat-welded seams
• Fire resistant
• Long-term flexibility

Cons:

• Higher cost than TPO/EPDM
• Can become brittle in extreme cold

Best for: Restaurants, commercial kitchens, buildings with chemical exposure

Built-Up Roofing (BUR)

What it is: Multiple layers of asphalt and felt or fiberglass.

Pros:

• Excellent waterproofing
• Long track record
• Good foot traffic resistance

Cons:

• Heavy weight
• Complex installation
• Difficult repairs

Best for: Buildings requiring maximum durability

Spray Foam Roofing

What it is: Polyurethane foam sprayed directly onto the roof deck.

Pros:

• Seamless application
• Excellent insulation (R-6 per inch)
• Lightweight
• Renewable with recoating

Cons:

• Requires skilled applicator
• UV protection coating required
• Susceptible to bird/mechanical damage

Best for: Energy efficiency projects, irregular roof shapes

Making Your Decision

The best roof system depends on:

• Your budget (initial vs. lifecycle cost)
• Building use and exposure
• Climate considerations
• Long-term ownership plans

Contact NovaRoof for a consultation on the best system for your building.