8 calculators
Walls & Finishes
Drywall, plaster, insulation, paint, cladding.
Plasterboard CalculatorBoards, screws, scrim and skim for a roomRendering CalculatorSand and cement, premixed and thin-coat renderInsulation Batts CalculatorPacks of ceiling, wall or underfloor batts by R-valueSuspended Ceiling CalculatorTiles, mains, cross tees, wall angle and wiresWallpaper CalculatorRolls needed with pattern repeatPaint CalculatorPaint for walls and ceilings, with coats and tin sizesExterior Paint CalculatorHouse walls and gables, with surface textureWeatherboard & Cladding CalculatorWeatherboards, wall wrap, trims and fixings
Guides for this trade
Walls & Finishes
How to estimate plasterboard for a room
Sheets, screws, compound and tape: measure once, count sheets the way installers hang them, and finish with the right consumables.
3 min readWalls & FinishesHow much paint? Coverage, coats and surfaces
Coverage rates on the tin assume perfect conditions. Here is how to adjust for surface, colour change and method so you buy the right amount.
3 min readWalls & FinishesInsulation batts: R-values and how many packs
R-value targets by NCC climate zone, ceiling and wall batts, and how to count packs.
3 min read