Spray foam insulation which acts beyond the layer of insulation works as barrier for air and moisture without the need for vapour barrier. Spray Polyurethane Foam (SPF) is combined mixture of isocyanate and polyol resin which are fast reacting liquids. These liquids expand and create foam when mixed. SPF insulation functions as air barrier on walls, ceilings, and concrete slabs.It helps in reducing air movement from holes, openings, cracks and crevices.
It also resists heat transfer. Due to its excellent sealing properties, its insulation properties are higher than any other product available in the market. Once it is given proper care in its initial period of application, it is completely safe. If there is anything negative, you have heard about spray foam insulation that is due to task undertaken by uncertified technicians with lack of product knowledge. The homeowners too may have bad experiences when used without proper safety equipment.