Do Johns Manvilles building insulation products contain any recycled materials?
Yes. Recycled glass is used as a partial replacement to the traditional sand and minerals for fiber glass production. The majority of Johns Manville’s building insulation products are independently certified by Scientific Certification Systems, Inc. (SCS) to contain a minimum of 25% recycled glass; 18% post-consumer remelted bottle glass; 7% pre-consumer glass. (Johns Manville North American average).
