Portland-Cement Plaster (Stucco) Material Takeoff
Bags of portland-cement plaster for a multi-coat thickness over an area.
Example
You enter
- Area to plaster (ft²) 1000
- Total coat thickness (in) 0.875
- Bag yield (square-foot-inches) 10.1
- Waste allowance (%) 10
You get
- Plaster bags 96 bags (95.3 before rounding)
Details, formula, and sources
bags = ceil(area x thickness / bag yield x (1 + waste/100)). 1,000 sf of a three-coat 7/8 in system on an 80-lb bag yielding 10.1 square-foot-inches is about 96 bags with waste; a two-coat 5/8 in system drops to 69. The coats (scratch + brown + finish, ~3/8 + 3/8 + 1/8 in over metal lath) come from the spec; the sand and lime are batched per the mix design. Distinct from mortar-mix and thinset-coverage.
bags = ceil(area_sf x total_thickness_in / bag_yield_sf_in x (1 + waste_pct/100)).
Portland-cement plaster bag-count identity by name (volume in square-foot-inches over the bag yield, plus waste); first-principles arithmetic.
The bag-count arithmetic is public quantity-survey math; the bag yield and the coat schedule come from the product and the spec.
Estimate. AHJ and licensed professional govern.
Field names used by the API: area_sf, total_thickness_in, bag_yield_sf_in, waste_pct, bags
- Coat thickness ~7/8 in three-coat over metal lath (3/8 scratch + 3/8 brown + 1/8 finish); the spec governsplaster specification
- Bag yield ~10.1 square-foot-inches per 80-lb bag (default); the product sets itplaster manufacturer