Stucco Lath Calculator

What this calculation does not cover

• The overlap allowance is a flat ten per cent applied to the area before any sheet is laid out, so it stands in for laps instead of deriving them from the 27 by 96 inch (686 by 2,438 mm) sheet — a wall broken up by openings, bays or a stepped foundation throws off far more cut sheets and unusable offcuts than one multiplier can cover.
• Rounding to whole sheets happens once, on the single combined area you enter, which quietly assumes offcuts travel from one elevation to the next; price each elevation separately and the same building normally lands a sheet or two higher.
• Sheet size is fixed in the code at 18 square feet (1.7 m²) and cannot be changed, so lath supplied in other panel sizes, in rolls, or as a paper-backed product with a different useful width will not divide into the count shown.
• Only area feeds the division, so a heavy self-furring diamond mesh and the lightest flat mesh return exactly the same number of sheets — the figure says how much wall gets covered, never whether the lath chosen suits the substrate, the exposure or the coats going over it.
• Nothing beyond the sheets is counted: the nails, staples or tie wire that fix lath at every support, the furring that holds unfurred mesh off the sheathing, and the terminations it runs into — weep screed, casing beads, corner aid, control joints — are all separate orders this number does not reach.
• The area is taken exactly as typed, so whether jambs, soffits and returns are inside it was decided before the page saw the number, and the arithmetic has no way to add back lath wrapped into a reveal or carried past an external angle.