Roofing
Calculators
Roof slate calculator
Example: Order: 739 slates at a 212.5 mm gauge
Roof tile calculator
Example: Order: 641 roof tiles for 61.04 m² of roof
Flat roof calculator
Example: Membrane sheet: 3.40 × 2.40 m
Guttering and downpipe calculator
Example: Rainwater flow: 1.26 L/s from 60.0 m² of effective roof
Roof batten calculator
Example: Order: 46 × 4.8 m battens (204.0 m)
Roof pitch and rafter length calculator
Example: Pitch 35.0°, rafter length 4.03 m
Project estimators
Garden room estimator
Plan a garden room: base, stud walls, insulation to a U-value, flat roof and a supply check. Costs only from your own prices.