California State Fire Marshal Offers Guidelines for Using Spray Polyurethane Foams with Non-Metallic Piping

 July 17, 2014 – The Lubrizol Corporation’s CPVC Piping Systems business calls the attention of the fire protection industry to recent developments in regards to the use of spray polyurethane foam with non-metallic piping and fire sprinkler systems. In its recent Information Bulletin 14-004 published May 27, 2014, the Office of the State Fire Marshal of California (OSFM) provides a set of guidelines covering the proper installation of spray polyurethane foam (SPF) so that it does not adversely affect the integrity of non-metallic pipe.

Spray polyurethane foams are rapidly growing in popularity as a result of energy saving trends in the building industry. During that time, extensive testing by the industry — led by the Spray Polyurethane Foam Alliance ( and manufacturers like Icynene — has demonstrated that SPFs do not adversely affect the performance of CPVC fire sprinkler systems when properly applied. The recent OSFM bulletin provides the guidelines for proper installation of SPF with nonmetallic fire sprinkler piping.

Among the guidelines provided in the OSFM bulletin is the recommendation that “The contractor installing insulation shall abide by the manufacturer’s recommended maximum thickness per pass,” in order to limit the exposure of the CPVC fire sprinkler system to the exothermic temperatures generated by SPFs. Additional information regarding compatibility issues between SPFs and its BlazeMaster® Fire Sprinkler Systems can also be found on Lubrizol’s FBC™ System Compatible Program website.

View the complete OSFM bulletin.

For additional information about SPFs and CPVC piping materials, read SPFA's research update and Insulating cPVC with Spray Foam Insulation.

Learn more about chemical compatibility and Lubrizol’s FBC™ System Compatible Program.

Because of its life saving and sustainability benefits, the installation of BlazeMaster Fire Sprinkler Systems in residential facilities — especially single family homes — continues to grow at a rapid pace. The guidelines that the bulletin provides give contractors, installers and local AHJs additional assurance to confidently specify BlazeMaster® Fire Sprinkler Systems for all light hazard applications.