What is a Polyurethane Foam Roofing System?

Polyurethane foam is produced by a chemical reaction of polyal and an isocyanate, along with other additives, resulting in a rigid plastic that expands to become a seamless layer of closed cell foam. The system includes preparation of the substrate, application of foam to specified thickness, and application of an elastomeric coating. There are several coatings available that provide a weather resistant surface that can be walked on for normal roof maintenance.

Advantages of a Polyurethane Foam Roofing System


Polyurethane foam can be applied to surfaces with irregular shapes and penetrations. Many applications can be made over the existing roof. This can eliminate the cost of tearing off the old roof.

Stops Leaks, Weather Resistant

Polyurethane foams form a monolithic, self-flashing surface that effectively seals against leaks. Further protection comes from the elastomeric coating applied over the foam. Foam can be sprayed with a slope to drains, facilitating water removal.

Adheres to Most Surfaces

A seamless layer of foam is fully adhered to the substrate, horizontal or vertical, and withstands high wind stresses.

Reduces and Simplifies Roof Maintenance

The applied polyurethane foam system usually requires no maintenance. If damaged, caulking is sufficient for repair in most cases.

Provides Superior Insulating Efficiency

Polyurethane foam is the most efficient form of thermal insulation commercially available. The systems usually pay for themselves in a few years with energy savings.

Reduces Building Movement

By placing the insulation on the outside, the foam system reduces building movement and thermal shock.


Complete polyurethane foam roofing systems are many times lighter than tar and gravel systems. When applied to an existing roof, the loose material removed usually ways more than the replacement foam. This results in the new roof being lighter than the original.

UL Listed

Polyurethane spray foams are listed under UL 790 and UL 723. UL 790 roofing systems are listed Class A over non-combustible decks and class B over combustible decks.

Asbestos and Formaldehyde Free

Polyurethane contains no asbestos or formaldehyde to cause health concerns for residents or employees.

Proven Roofing and Insulating System

Polyurethane spray foam roofing systems have been applied successfully for over 25 years.

Single Ply Recoats

Extend the life of your hypalone, EPDM single ply roof with acrylic or urethane coatings. We offer 5, 10, and 15-year warranties.


Spray On Foam & Coatings, Inc
7902 NE St Johns Rd
Vancouver, WA 98665

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