How Much Artificial Grass Do I Need?
Quick Answer
Area + 10% waste — ~26.4m² for a 6m × 4m garden
Standard roll widths 2m and 4m. Choose the width that minimises joins and waste
How We Calculated This
- Garden area: 6m × 4m = 24m²
- Wastage: 10%
- Total: 24 × 1.10 = 26.4m²
- Using 4m-wide roll: 6m length needed = 24m² from roll (minimal waste with one cut)
Roll Width Planning
Artificial grass comes in 2m and 4m roll widths (some brands also offer 5m). Plan your layout to minimise joins:
- 4m width: Best for gardens up to 4m wide. One piece, no joins
- 2m width: Better for narrow areas, paths, or when 4m would create excessive waste
- All joins should run in the same direction as the pile leans
Sub-Base Requirements
- Remove existing turf/topsoil to 75–100mm depth
- Lay weed membrane
- Compact 50–75mm of MOT Type 1 or granite dust
- Top with 10–15mm of sharp sand or granite dust, levelled
- Lay artificial grass on top
Cost Guide (2026)
- Budget grass (25–30mm pile): £8–£15/m²
- Mid-range (30–37mm pile): £15–£25/m²
- Premium (37–45mm pile): £25–£40/m²
- Professional installation: £50–£80/m² (supply, sub-base, and fit)
Accessories Needed
- Joining tape: For seams between rolls
- Adhesive: For bonding tape
- Fixing pins: U-shaped galvanised pins, every 200–300mm around edges
- Kiln-dried sand infill: 4–6 kg/m² for stability and pile support
Last updated: April 2026