Fiberglass Attic Insulation Benefits

Spray foam insulation like fiberglass or cellulose resist the transfer of heat, helping reduce heating and cooling costs. They also resist air infiltration. However, these types of insulation do not seal air leaks as effectively as foam insulation or certain caulks. In a typical home, outdoor air is constantly entering through gaps and cracks in the building envelope — often conditioned air is leaking out. These leaks are exacerbated by the stack effect, which occurs when warm air rises and colder air sinks.

Fiberglass insulation is available in blanket form (called “batts”) or in bags as loose-fill that can be blown into wall, floor and attic cavities. In either case, the insulation should be unfaced, which means it has no paper or foil backing. The back of the insulation should face toward the warmth of the space, as this creates a barrier that retards moisture and minimizes the risk of fibers infiltrating the living spaces below.

Attic Insulation R-Value Guide for Different Climates

Blown-in fiberglass settles over time, which reduces its R-value. Therefore, you should be prepared to rent a blower machine periodically to top off your blown-in fiberglass insulation to ensure it maintains its optimal R-value.

In addition to reducing energy costs, fiberglass and cellulose are noncombustible and resistant to fire and smoke. They also provide a degree of soundproofing.

Coastline Insulation
268 Serenoa Rd Unit 2B, Santa Rosa Beach, FL 32459
(850)-565-1027
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