Render calculator

Sources

1. Mortars, plasters and renders (Spelthorne Borough Council, advisory leaflet 7): base coat 9–16 mm, finish 3–10 mm, each coat thinner and the same strength or weaker; 1 : 2 : 9 for weaker backgrounds; sharp, well-graded sand; dirty sand causes crazing
2. US National Park Service, Preservation Brief 22: stucco: two or, more commonly, three coats; the first two together generally no more than about 16 mm (5/8 in), finish coat about 6 mm (1/4 in); stucco must not dry too fast or it cracks
3. University of Babylon, Methods of construction and estimation, lecture 14: mortar is about 0.22 m³ per m³ of brick masonry; dry materials shrink by about a quarter when mixed; bulk density of cement 1,400 kg/m³
4. NA to BS EN 1996-1-1 UK National Annex to Eurocode 6 (BSI 2007), Table NA.2: mortar classes M12, M6, M4, M2 with cement : lime : sand 1 : 0–¼ : 3, 1 : ½ : 4–4½, 1 : 1 : 5–6, 1 : 2 : 8–9 by volume (designations i–iv); the lower sand figure for sands with more fines, the higher for sands with fewer
5. NPTEL (Indian Institutes of Technology), soil mechanics worked examples: dry sand about 1,600 kg/m³
6. US Office of Surface Mining (OSMRE), lime products, citing the National Lime Association: hydrated lime bulk density 3.34 lb/gal, about 400 kg/m³