What makes a product non-combustible?

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Author Message Jerome J. Lazar, RA, CCS, CSI, SCIP Senior Member Username: lazarcitec Post Number: 1195 Registered: 05-2003 Posted on Thursday, October 09, 2014 - 02:26 pm:    Condition: Foam molding or profile on a building façade needs to be non-combustible, do all the components of the molding/profile need to be non-combustible or will a non-combustible coating suffice? John Bunzick, CCS, CCCA, LEED AP Senior Member Username: bunzick Post Number: 1599 Registered: 03-2002 Posted on Saturday, October 11, 2014 - 05:05 pm:    Jerome: What section of the code are you looking at? Jerome J. Lazar, RA, CCS, CSI, SCIP Senior Member Username: lazarcitec Post Number: 1196 Registered: 05-2003 Posted on Saturday, October 11, 2014 - 05:35 pm:    FBC 1406.2.2.2 (EXTERIOR WALLS: "Combustible architectural trim shall be limited to 40 feet in height above grade." in this case combustible trim is above 40ft, the question is if the combustible trim (EPS) is set in scratch coat of cement plaster over CMU and all exposed sides of the trim are encapsulated in min 5/8-in cement plaster with all joints caulked, is the trim still considered combustible? Ronald L. Geren, FCSI, AIA, CCS, CCCA, SCIP Senior Member Username: specman Post Number: 1263 Registered: 03-2003 Posted on Sunday, October 12, 2014 - 02:22 pm:    Jerome: You have to go back to 1406.2.1. It requires combustible exterior wall coverings to be tested per NFPA 268, unless one of the exceptions apply. You would probably comply with Exception 2. However, this means that the assembly does not need to comply with NFPA 268, but it is still considered a combustible exterior wall covering. Therefore, to answer your question, a noncombustible coating over a combustible material does not exclude the assembly from the 40-foot limitation. Ron Geren, FCSI, AIA, CCS, CCCA, SCIP www.specsandcodes.com Jerome J. Lazar, RA, CCS, CSI, SCIP Senior Member Username: lazarcitec Post Number: 1197 Registered: 05-2003 Posted on Sunday, October 12, 2014 - 03:08 pm:    Thanks Ron