https://store.astm.org/stp45374s.html
Artificial Roofing Slates and Shingles
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https://northwestroofingsupplies.co.uk/
Roofing Supplies North West | Tiles, Slates, Felt & More
Apr 9, 2026 - North West Roofing Supplies is your local roofing merchant with branches across the North West. We stock roofing tiles, slates, felt, insulation and more at...
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https://store.astm.org/c1225-00.html
C1225 Standard Specification for Non-Asbestos Fiber-Cement Roofing Shingles, Shakes, and Slates