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⛩️ ADVANCED ROOFING CALCULATOR

All prices in KES (KSh)

1. ROOF TYPE & DIMENSIONS
🏠
Gable Roof
Two sloping sides meeting at a ridge
🏡
Hip Roof
All sides slope downwards to the walls
🏪
Shed Roof
Single sloping roof surface
🏢
Flat Roof
Nearly horizontal roof with slight slope
🏛️
Mansard Roof
Four-sided gambrel-style hip roof
🏚️
Gambrel Roof
Two-sided roof with two slopes on each side
mm
mm
mm
Overhang beyond wall on each side (typically 300-900mm)
°
Common: 15°-45° (Flat: 1-10°, Steep: 45°+)

Roof Type

Gable Roof

Total Roof Area

-- m²

Rafter Length

-- m

Rafter Span

-- mm

OR Enter Roof Area Directly:

m²
2. ROOFING MATERIAL
🥫
Corrugated Iron Sheets
3-5 kg/m² | 15-30 years
🧱
Clay Tiles
20-30 kg/m² | 50-100 years
🏗️
Concrete Tiles
30-40 kg/m² | 30-50 years
🛡️
Asphalt Shingles
10-15 kg/m² | 15-30 years
📦
Metal Sheets
3-8 kg/m² | 20-50 years
🌾
Thatch
15-25 kg/m² | 15-25 years
mm
mm
Vertical overlap between sheets
mm
Side lap between sheets

Roofing Material

Corrugated Iron Sheets

Sheets/Tiles Needed

-- pieces

Total Sheets Area

-- m²

3. TIMBER STRUCTURE
mm
Center-to-center distance (typically 400-600mm)
mm
Center-to-center distance (typically 800-1200mm)

Rafters

50x100

Purlins

50x150

Rafters Needed

-- pieces

Purlins Needed

-- pieces

Total Timber Volume

-- m³

4. GUTTER SYSTEM (Optional)
5. PRICING & ADDITIONAL COSTS

Timber Pricing

Additional Timber

per piece
per m
per kg
per m²
Additional materials for cutting waste
Unexpected costs allowance