Spray Polyurethane Foam Roofing Cost

For an average 20,000 sq. foot commercial roof, it will usually cost between $6.00 and $12.00 per square foot in materials and labor to install a typical SPF roofing system. This price range is for an SPF 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 $6-$12 threshold.

NOTE: As of January 2023, 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

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.

Restoration Option

When your SPF roof is in good shape but needs to be improved, you can have a silicone restoration membrane installed to new the life of your commercial roof.

Energy Efficient

The energy efficiency and roof insulation properties of a closed-cell spray polyurethane foam roof contribute to significant energy savings throughout the life of a building. In fact, studies show that the average payback period for a new foam roof can be reached in as little as five years.

Durability

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

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.

Want to learn more about spray foam roofing?

How much does it cost? What problems do they have? What are the benefits versus other roofing systems?