Roof

• Rafter Length CalculatorWork out common rafter length, overhang length, and plumb/seat cut angles from span, pitch, and overhang.
• Mono-Pitch Roof CalculatorTake off a single-slope roof: rafter length and count, timber volume, eaves length, and the true roof surface area next to its plan projection.
• Gable Roof CalculatorTake off a two-slope roof: ridge length, rafter length and count per slope, each slope's area, gable-end triangles, and the true roof area next to its plan projection. Handles unequal pitches.
• Roof Battens CalculatorTiling battens and counter-battens over the rafters: rows per slope at the covering's gauge, total length, stock lengths packed (not divided), counter-batten count and timber volume.
• Gutters and Downpipes CalculatorRainwater goods take-off: gutter length and stock lengths, brackets, corners, stop ends, downpipes sized by the EN 12056-3 method (effective roof area, rainfall intensity, gutter and pipe capacity), with their brackets, outlets and shoes.
• Roof Sheets CalculatorCount profiled metal roof sheets for a gable roof: sheets per slope from the effective cover width, the sheet length to order (rounded up to the product's module if it has one), ridge caps, verge trims and roofing screws.
• Hip Roof CalculatorEstimate ridge length, common/hip/jack rafter counts and lengths, and covering area for a simple uniformly-pitched hip roof.
• Gambrel Roof CalculatorEstimate rafter lengths, ridge height, and covering area for a two-slope gambrel roof (open gable ends) with a lower steep pitch and an upper shallow pitch.