Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

Is gypsum board considered to be a non-combustible material by the building codes?

April 26, 2017building gypsum material non-combustible

0

Posted

Is gypsum board considered to be a non-combustible material by the building codes?

1 Answer

0

Posted

Due to the unique properties of the gypsum core, gypsum board is widely used in fore resistant rated construction. Model building codes, including the International Building Code consider composite building materials such as gypsum board to be non combustible if: • The core of the material passes ASTM E 136 • The material surfacing is not more than 1/8″ • The composite material has a flame spread rating of not greater than 50 when tested in accordance with ASTM E 84. Gypsum board meets these three criteria and therefore is considered to be non combustible. NOTE: a slightly different definition is contained in NFPA 5000, Building Construction and Safety Code.