What Are Roof Shingles Made Of? Posted byRoofing Envelope Contractors August 14, 2020 Leave a comment on What Are Roof Shingles Made Of? https://jdtconstructionllc.com/what-are-roof-shingles-made-of/Share this:TwitterFacebookLike this:Like Loading... Published by Roofing Envelope Contractors 35 Years in the Roofing and Sheet Metal Contracting Experience in Roofing and Contracting View more posts