GAF vs. CertainTeed Roofing Shingles: Cost, ROI – Definitive Guide Posted byRoofing Envelope Contractors April 29, 2020 Leave a comment on GAF vs. CertainTeed Roofing Shingles: Cost, ROI – Definitive Guide https://www.roofingcalc.com/gaf-vs-certainteed-roofing-shingles/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