Expanded Polystyrene Foam Board Insulation Fire Resistant

1 in x 4 ft x 8 ft.

Expanded polystyrene foam board insulation fire resistant.

When installed correctly expanded polystyrene products do not present an undue fire hazard. 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. Astm c578 standard specification for rigid cellular polystyrene thermal insulation addresses the physical properties and performance characteristics of eps foam as it relates to thermal insulation in construction applications.

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. 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. This q a article discusses the requirement for a fire resistant covering for foam and foam board board building insulation. This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses.

It is denser than eps and provides more r value with a rating of 5 per inch of thickness. Exposed foam board insulation fire hazards.