Environmental considerations

Fiberglass uses two resources, sand and recycled glass. Sand does not have an impact on nonrenewable natural resources. Recycled plate and bottle glass is considered a secondary raw material, so, when used as raw material, recycled glass is changed into a prod­uct that can save energy and reduce pollution.1

All fiberglass companies use at least 20 percent recycled glass cullet in their insulation products to comply with the U. S. Environmental Protection Agency (EPA) recycled-content pro­curement guidelines. Johns Manville’s fiberglass is certified by Scientific Certification Systems (SCS) to contain 25 percent recy­cled glass (18 percent postconsumer bottles and 7 percent postin­dustrial cullet). Johns Manville’s manufacturing equipment readily handles colored glass, making it easier for the company to use postconsumer recycled cullet. CertainTeed and Owens Corning rely primarily on postindustrial cullet from flat glass manufacturers.9