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Roof Weight Calculator

Calculate the total weight of your roof in stone coated steel, asphalt, wood shake, concrete tile, clay tile and slate — and see why lighter roofs skip upgrades.

Stone coated steel total
In tons
Compared with concrete tile

Most homes framed for asphalt shingles can take stone coated steel without structural reinforcement. Concrete and clay tile usually need an engineer's sign-off when replacing a lighter roof.

Total roof weight by material

Typical installed weights per sq ft: stone coated steel 1.6–2.4 lb, standing seam 0.9–1.5, architectural asphalt 2.3–4.3, wood shake 3–4.5, concrete tile 9–10, clay tile 8–12, slate 8–15. Excludes decking and underlayment.

Why roof weight matters

Swapping a lightweight roof for a heavy one can require rafter and deck reinforcement — and an engineer's letter. Concrete and clay tile weigh four to five times as much as stone coated steel. That's why stone coated tile and slate profiles are popular in Texas: the look of a heavy roof on framing built for shingles.

Compare materials in depth: stone coated vs concrete tile, stone coated vs clay tile and slate roofs.

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