Roof calculator
How many sheets does your roof need?
Enter your building size and roof pitch for an instant estimate of sheet count, cut length and roof area. Send it straight to our team for an exact quotation.
1. Your roof
Along the ridge
Wall to wall, across both slopes
Most Kenyan residential roofs sit between 15° and 30°. Not sure? Leave it at 20°.
Eaves & gable overhang, each side
Extra sheets for cuts and damage
2. Your roofing
Width each sheet covers once lapped
Cover width differs between profiles. Choose a product to fill in its typical cover width, or keep 1.0 m for a first estimate — our team confirms the exact figure in your quotation.
Your estimate
28sheets
cut to 4.8 m each
- Sheets per slope
- 13 × 2
- Roof area
- 124.5 m²
- Ridge length
- 13 m
- Eaves (gutter run)
- 26 m
This is a guide for simple gable and mono-pitch roofs. Hips, valleys, dormers and other features change the quantities — book a free site visit and we'll measure for you.