5 calculators
Roofing
Roof area, pitch, tiles, IBR sheeting, gutters.
Roof Tile & Slate CalculatorRoof area, tiles, battens, membrane and ridgeRoof Pitch CalculatorConvert rise/run, x/12, degrees and percentMetal Roof Sheet CalculatorIBR sheets, purlins, flashings and screwsGutter CalculatorGutter lengths, downpipes, brackets and fittingsRoof Truss & IBR Sheeting CalculatorTrusses, purlins, IBR sheets and screws for a gable roof
Guides for this trade
Roofing
Estimating concrete tiles, IBR and corrugated roofs
How to count concrete roof tiles and battens, IBR sheets, purlins and screws, with the makers’ published figures and the SANS 10400-L slope limits.
4 min readRoofingRoof pitch rules and when you need a membrane
The minimum pitches SANS 10400-L sets for tiles, slates and sheeting, and the three situations where an undertile membrane is required.
3 min readRoofingGutters and downpipes
How to take off a PVC gutter system: lengths, outlets, brackets, joints and downpipes, with the installation rules in Marley’s South African guide.
3 min read