Roof Decking Calculator
Calculate roof decking materials, spacing, and costs with our comprehensive calculator. Plan your roofing project for optimal material usage, structural integrity, and cost efficiency.
Step 1: Roof Specifications
30 cm
Standard Roof Dimensions
Typical roof pitches: 15°-45°. Overhang usually 30-60cm. Allow for waste factor of 10-15% when calculating materials.
Step 2: Decking Specifications
40 cm
10%
Optimal Decking Tips
Standard joist spacing: 40-60cm for plywood/OSB. Stagger board joints for strength. Allow 3mm gap between boards for expansion.
Roof Decking Results
Summary
Layout Visualization
Material Comparison
Total Roof Area
80 m²
10×8m roof with 30° pitch
Boards Required
28
Total Material
88 m²
Waste Factor
10%
Joists Required
21
Decking Layout Visualization
Board Layout
Staggered
Joist Spacing
40 cm
Overhang
30 cm
Coverage
100%
Decking Material Comparison
| Material | Thickness | Max Joist Spacing | Cost per m² |
|---|
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