How Many Skirting Boards Do I Need?
Quick Answer
Approximately 5 lengths of 3m skirting board
Based on: 3.5m × 4m room (15m perimeter), minus one 826mm door opening, using 3m lengths
How We Calculated This
- Room perimeter: 2 × (3.5 + 4) = 15m
- Minus 1 standard door opening (826mm): 15 − 0.826 = 14.17m
- Lengths needed at 3m each: 14.17 ÷ 3 = 4.7, round up to 5
Standard Skirting Board Lengths
- 2.4m (8ft): Most common from DIY stores
- 3.0m (10ft): Professional/trade supply
- 4.2m (14ft): Available from timber merchants
Common Skirting Profiles & Heights
- Torus: 95mm, 120mm, 145mm, 170mm
- Ogee: 95mm, 120mm, 145mm
- Chamfered/pencil round: 70mm, 95mm, 120mm
- Square edge: 70mm, 95mm, 120mm
Tips
- Buy 10% extra to allow for mitred corners and cutting waste
- Internal corners are best scribed rather than mitred for a tight fit
- External corners should be mitred at 45°
- Pre-prime all faces including the back to prevent moisture absorption
Last updated: April 2026