Spray-Applied Cellulose Insulation Can Be More Effective Than Wood Firestops

The March 1996 issue of

Energy Design Update reports that fire tests at a laboratory in California have demonstrated that spray-applied cellulose insulation can be a more effective fire stop than conventional wood firestops in a 2x4 wall. The testing was done as part of an effort to gain Uniform Building Code (UBC) approval for the insulation as a firestop material in walls. Builder Bruce Patton of Escondido, California is attempting to patent the process.