What type of insulation is commonly found in older homes?

Fiberglass batt insulation is commonly found in older homes due to its popularity since its introduction in the mid-20th century. It offers a cost-effective solution for thermal insulation and has been widely used in both residential and commercial buildings. The insulation is made from fine glass fibers, which are formed into batts or rolls, making it easy to install between wall studs, floor joists, and ceiling rafters.

Older homes, especially those built from the 1950s to the 1980s, often utilized fiberglass batt insulation because it was readily available and widely recognized for its effectiveness in reducing heat loss. The material is non-combustible and relatively resistant to moisture, contributing to its enduring usage during that period.

In contrast, other types of insulation such as foam board insulation, cellulose insulation, and spray foam insulation may not have been as widely implemented in older homes. Foam board and spray foam insulation are more modern solutions, often employed in newer constructions for their high R-values and air-sealing properties, while cellulose, made from recycled paper products, has gained popularity more recently as an eco-friendlier option.