In which decade were glass fiber mats first used in asphalt shingles?

Glass fiber mats were first introduced in asphalt shingles during the 1960s. This innovation marked a significant advancement in roofing materials, as glass fiber mats offered improved durability and resistance to moisture compared to earlier organic felt materials. The introduction of glass fiber allowed for shingles that were lighter, more stable, and capable of better weather resistance. This development contributed to the evolution of asphalt shingles into the widely used roofing material it is today, as the improved properties enhanced performance and longevity. The choice of the 1960s reflects a pivotal moment in roofing technology, aligning with the broader trends of innovation during that era.