Spray Foam Roofing

delivers the highest R-value per inch of any insulation product

Spray Polyurethane Foam For Commercial Flat Roofs

Spray Polyurethane Foam (SPF) is an eco-friendly roofing option for commercial, industrial and manufacturing facilities. While SPF roofing is not the most known type of roofing material, the technology has been around since the early 1960s for industrial, commercial, and residential facilities. An SPF roofing system can be used in any climate, and when properly installed and maintained, can last over 50 years.

Here at West Roofing Systems, we’ve been installing Spray Polyurethane Foam Roofs out of Cleveland, Ohio for over 40 years. Our turnkey solutions deliver energy savings, reduced maintenance, and sustainability – not to mention a durable, long lasting, quality roof.

West Roofing Systems’ experienced project managers and applicators bring decades of experience to each job, ensuring the best solution at the best price.

Our West Roofing Systems team out of Cleveland, Ohio talks about the Spray Polyurethane Foam Roofing installation.
Spray Foam Roofing Cost

For an average 20,000 sq. foot commercial roof, it will usually cost between $5.00 and $10.00 per square foot in materials and labor to install a typical spray foam roofing system. This price range is for a spray foam roof of average thickness and building structure.

Increased material costs, gas prices, and many other variables can push the cost of an installation past the $5-$10 threshold.

NOTE: As of April 2024, with material and labor shortages, pricing is very volatile.

Other variables that affect pricing include:

  • The current cost of materials
  • Size of your roof
  • The thickness of SPF (R-value desired)
  • Condition of the existing roof
  • How much of a slope your roof is on
  • Access to your roof
  • Climate/weather patterns in your area
  • Length of warranty
Watch this video to learn more about Spray foam costs
Spray Polyurethane Foam Benefits

A spray polyurethane foam roof system decreases energy expenses, contributes to LEED and Energy Star certification, provides a heat, moisture and air barrier is easy to maintain and can last for years by renewing the roof’s protective coating. Building owners realize significant reductions in energy expenses for heating and cooling, as well as reduced maintenance costs.

The benefits of installing a spray polyurethane foam (SPF) roofing system, rather than another roof type, are numerous in terms of installation, performance, cost, and longevity.

Minimize Tear-off

One of the best ways to save money is to avoid the complete tear-off. In many cases, spray foam can be installed over an existing roof, saving the building owner money.

Energy Efficient

Spray foam has an R-value of 6.5 per inch of thickness. This is the best R-value per inch of any roofing insulation out there. 


The durability of SPF surpasses traditional roofing systems. The foam material can expand and contract with the building in accordance with outside temperatures, decreasing the likelihood of cracks and splitting.

Seamless and Waterproof

Since the SPF mixture is applied as a liquid, it can fill gaps, seams, and cracks in the existing roof and substrate. The continuous solid surface does not require joints or seams, removing the most vulnerable area for leaking.

Environmentally Friendly

There are a variety of eco-friendly roofing products, which feature zero ozone depletion potential (ODP), ultra-low global warming potential (GWP) and solvent-free silicone coatings.
Spray Polyurethane Foam Installation

Before the installation can start, the existing roof (or substrate) needs to be prepared. Rather than stripping the existing roof, the contractor will most likely prepare the substrate by getting rid of all dirt, dust, and contaminants. This can be done with air pressure, vacuuming, or even just sweeping.

The first layer put down by the contractor is the polyurethane foam. This foam is created by combining two liquids (a polyol/resin and an isocyanate) as it’s sprayed onto the existing roof substrate.

As the liquid is sprayed onto the existing roof, it creates a foam that expands 20 times in size to form a solid, seamless foam surface. When the foam has expanded, this layer can be between 1 and 1.5 inches in thickness. Since the polyurethane foam adheres to most common surfaces, it can be installed on any roof slope.

Read More About SPF Installation and Performance

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