This innovative lightweight slate roof system allows a 35-40% reduction in roof weight to accommodate slate roofs at less than 6 lbs. per square foot. This system is perfect for new construction or roof replacements upgrades from a cedar shake, plastic fake slate, or asphalt shingle roof without any structural support requirements. Designed and manufactured using North American produced products with our complete range of natural North Country Slate ASTM S-1 roofing shingles, this system offers the security of a traditional slate roof at a fraction of the weight.