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
Box Profile Glossy Finish: Kenyan box profiles typically cover 0.78–1.01 m. This is a typical industry figure, filled in for you — our team confirms the exact cover for your order in your quotation.
Your estimate
28sheets
cut to 4.8 m each · Box Profile Glossy Finish
- Sheets per slope
- 13 × 2
- Roof area
- 124.5 m²
- Ridge length
- 13 m
- Eaves (gutter run)
- 26 m
Estimated material cost — Box Profile Glossy Finish
- G30 · KSh 480/mKSh 64,512
- G28 · KSh 630/mKSh 84,672
- G26 · KSh 1,350/mKSh 181,440
Excludes accessories and delivery.
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.