In 2011 the Environmental Protection Agency (EPA) raised some questions over the using spray foam insulation. A review of the EPA website, states that ‘Spray polyurethane foam (SPF) is an excellent insulation and air sealant material; however, exposures to its key ingredient, isocyanates, and other SPF chemicals which may be found in vapors, aerosols, dust, or on surfaces during and for some time after installation could cause adverse health effects including:
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