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Reclaimed Slate by Size
16", 18", 20" and 24" slate, sorted by length and staged by the pallet so your crew can start at the eave and keep going.
Working lengths
Widths are random on all sizes. Exposure figures assume a 3" headlap.
16" x random
6.5" exposure. The workhorse size for dormers, porches, additions and patch work on smaller period houses.
18" x random
7.5" exposure. The most commonly specified length on American slate roofs and the easiest to source in volume.
20" x random
8.5" exposure. Fewer courses, faster coverage, and the scale that suits large steep-slope elevations.
24" x random
10.5" exposure. Limited batches. Used for grand houses, institutional roofs and the bottom courses of graduated work.
Estimating from a size
Coverage per square varies with exposure. As a rule of thumb, a square of 16" slate takes roughly 275 pieces, 18" takes about 225, 20" about 170, and 24" about 115. Add 10–15% for breakage, starters and cuts. Send us your roof area and pitch and we will build the pallet count for you.
Not sure what you need? We’ll walk you through it.
Whether it’s a specific match or a custom project, we’re happy to help.
