The Truth About Flammability of Polyurethane Foam Insulation

Properly insulating your home saves money and energy during cold months. However, some types of insulation, such as polyurethane foam insulation, present a fire hazard.


Polyurethane foam insulation burns quickly if ignited, emitting smoke, heat and toxic gases, according to the Occupational Health & Safety Administration. Toxic gases emitted by burning polyurethane foam include carbon monoxide, nitrogen oxides, hydrogen cyanide, benzene, acetaldehyde and acetone.


Some types of polyurethane foam insulation claim to be "flame-resistant" or "fire-retardant." However, these products still cause large amounts of toxic gases when exposed to fire or flame, which are as lethal as a fire.


Polyurethane foam insulation can be used safely if you install it in a flame-retardant and heat-retardant structure, such as gypsum board, according to the U.S. Consumer Product Safety Commission. Never allow welding, cigarette smoking or other types of flame around polyurethane foam insulation.

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