Although insulation often goes unseen, it is a product that deserves some attention, as it can help your home or building become more comfortable and efficient.

Fiberglass is a type of fiber primarily composed of glass that is used in a wide variety of applications, and is predominantly employed as a residential and commercial thermal insulator. As an insulator, it slows the spread of heat, cold, and sound in homes. By trapping pockets of air, it keeps rooms warm in the winter and cool in the summer and thereby serves as a convenient method to increase energy efficiency. In homes, fiberglass insulation can be installed in various parts of the building envelope. It can bepink, yellow, white or green, depending on its manufacturer, and has a spongy feel.

Commonly found in blanket form, called batts, it is available in bags containing standard pre-cut lengths and widths. Batts are typically stapled into place. It also comes in bags as loose fill that can be blown into attic, wall and floor cavities. Most fiberglass batts are manufactured with a paper or foil backing that faces the direction of warmth. When installed correctly, it creates a continuous membrane that retards the passage of moisture and reduces the likelihood that fibrous particles will enter the living space. It is important that the backing always faces the warm side of the structure in which the insulation is installed.

Thermally efficient

Excellent acoustics

Low cost

Noncorrosive

Does not absorb moisture

Noncombustible (unfaced only)

Won’t settle over time

Lightweight

Easy to handle and install