Expanded Polystyrene Foam Board Insulation Fire Resistant

Like all organic building materials polystyrene foam is combustible and does react to fire resulting in the decomposition of styrene and the release of carbon monoxide smoke and water.

Expanded polystyrene foam board insulation fire resistant.

This q a article discusses the requirement for a fire resistant covering for foam and foam board board building insulation. Since most fire codes call for a minimum of half hour fire rating over foam insulations paneling would probably not provide a sufficient fire barrier over the foam insulating board. However the burning behaviour of eps depends largely on end use conditions and whether the eps material is with or without a fire retardant additive. The thermal conductivity of expanded polystyrene foam of density 20 kg m 3 is 0 035 0 037 w m k at 10 c.

Exposed foam board insulation fire hazards. It is denser than eps and provides more r value with a rating of 5 per inch of thickness. 1 in x 4 ft x 8 ft. Because of its resistance to moisture foam board insulation is a great choice.

However in practice its burning behavior depends on the conditions under which it is used as well as the inherent properties of the material. When installed correctly expanded polystyrene products do not present an undue fire hazard.