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Uncontrolled air leakage is an enemy of energy efficiency in a home, responsible for 25 to 40 percent of energy loss. While fibrous batts provide minimal resistance to air infiltration and exfiltration, Spray Foam Insulation fills cracks, crevices and penetrations in the building envelope, when properly applied, creating an airtight seal. Spray Foam Insulation also helps contribute to a quieter home by minimizing vibrations and noises that transmitthrough gaps and cracks in the building envelope.
Most building failures are related to moisture. Moisture accumulation can result from uncontrolled air movement. Fiberglass batts have gaps and open pockets that let air circulate within the cavity. And the air-permeable nature of fiberglass allows air to move right through just like in a furnace filter. Condensation occurs inside attics, ceilings, walls and floors when warm, humid air passes through or around the insulation and contacts a cold surface.
Spray Foam Insulation fills gaps and cracks, halting the majority of airborne moisture movement. In addition, the closed-cell, uniform structure of Spray Foam Insulation forms an effective air seal to minimize air movement and accompanying moisture. In this way, it helps prevent moisture accumulation and reduces the potential for mold and mildew growth. The rigid foam is also semi-permeable to vapor transmission, allowing for cavity drying in both directions when necessary.
Spray Foam Insulation expands within the wall cavity, eliminating opportunities for moisture intrusion, when properly applied.
Gaps and open air pockets around batt insulation create optimal conditions for condensation, moisture accumulation and increased potential for mold and mildew growth.
