Vermont Specialty SlateSlate Roofing Technical Information |
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Slate Roofing Sizes in inches and # pieces per square with a 3" headlap.
One "square" or (sq.) of slate is equivalent to 100 square feet of roof area. Roof slate pieces per square can be calculated by using the formula: 14,400/[((Length-Headlap)/2) x Width]
Average weight for one square of 1/4" thick roofing slate is 800lbs. (Weight will very with thickness of the slate)
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