Technical Foam Corp. Spray polyurethane foam roofing and insulation Elastomeric Coating products Flat and low pitch roof specialists
Technical Foam Corp.   Spray polyurethane foam roofing and insulationElastomeric Coating productsFlat and low pitch roof specialists  

What is Spray Foam Roofing


Spray polyurethane foam roofing systems consist of an application of specifically designed spray foam, covered with an elastomeric coating or aggregate covering to protect the foam from ultraviolet rays. Specialized equipment mixes two liquid components at the spray gun that applies foam to a prepared substrate. The mixed liquid expands to 30 times its original volume, forming a rigid foam plastic within 3 to 10 seconds, while chemically bonding to the surface on which it is sprayed. Spraying the foam in 1/2 to 1-1/2 inch lifts to a desired thickness (1" minimum) fills in low areas, builds in slope, and provides insulation. 



Spray polyurethane foam has a closed cell structure and is water resistant. It must, however, be protected by elastomeric coatings or aggregate coverings to prevent UV-induced surface degradation. Such coverings can also be used for other purposes, including inhibiting moisture vapor transmission, enhancing the aesthetics of the system, increasing the impact and abrasion resistance of the system, achieving flammability, and code requirements.


Resources for more information:

A number of technical publications relating to sprayed polyurethane foam are available. The following guidelines and technical documents specifically relate to spray polyurethane foam roofing systems:

  • AY 102 A Guide for Selection of Protective Coating Over Sprayed Polyurethane Foam Roofing Systems
  • AY 104 Spray Polyurethane Foam Systems for New and Remedial Roofing
  • AY 110 Spray Polyurethane Foam Aggregate Systems for New and Remedial Roofing
  • AY 122 The Renewal of Spray Polyurethane Foam and Coating Roof Systems
  • AY 127 Maintenance Manual for Spray Polyurethane Foam Roof System.

The following documents are also available from other organizations and include information furnished by SPFD and other sources.

  • AIA Master Spec on Spray Polyurethane Foam Roofing
  • ASTM Standard Guide for Application of New Spray Applied Polyurethane Foam and Coated Roofing Systems
  • CSI Monograph on Spray Polyurethane Foam Roofing
  • NRCA Waterproofing Manual, Spray Polyurethane Foam Roof Section
  • NRCA Materials Guide

 From Martin Knowles.  You can read the full article at:


For a video of spray foam roofing please click on the picture in the right hand panel.


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Technical Foam Corp.
23550 E 156th Ave
Brighton,CO 80603

Phone: 720-628-4516720-628-4516



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Click on the picture below to vies a video on a typical foam roof installation.

Faom roof installation video
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