When were glass fiber mats first used in asphalt shingles?

Glass fiber mats were first introduced in asphalt shingles during the 1960s. This innovation significantly changed the manufacturing process and performance characteristics of asphalt shingles. Prior to the use of glass fiber mats, shingles were predominantly made with organic felts that were less resilient to moisture and heat degradation. The introduction of glass fibers enhanced the dimensional stability, fire resistance, and overall durability of shingles, making them a more reliable option for roofing.

While the 1970s saw further advancements and the height of popularity for glass fiber reinforced shingles, the initial integration into the roofing industry began in the 1960s. This period marked the transition to more advanced materials in building products, aligning with the broader trends toward increased safety and efficiency in construction practices.