Fiberglass insulation became commonly used as an insulation material in the 1950s. It is found in attics, basements and wall cavities. Most fiberglass insulation is pink, but it also comes in yellow and white.
The uneven distribution and gaps in this fiberglass severely reduce the effectiveness of the insulation. Rodents and pests are attracted to fiberglass to use as nesting material. The lack of air sealing means that air will pass through the fiberglass and into the home.
Fiberglass insulation is a type of fiber primarily composed of spun glass that slows the spread of heat, cold, and sound. Fiberglass insulation was invented in 1938, and became commonly used as an insulation material in the 1950s. Fiberglass is often found in attics, basements and wall cavities.
Fiberglass Insulation works well in wall cavities, because it is sandwiched between plywood, lumber, and sheetrock or plaster. Fiberglass insulation is not effective in open cavities, such as attics, roofs, crawlspaces, and basements, because air passes through it.
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