MetraNestRead dimensions in the right direction
The strips follow the length of the area. The roll width covers one strip of this area; each additional strip loses the overlap width. The edge allowance, if entered, is added on both sides of each dimension. The calculation keeps these inputs separate to make waste clear.
Account for roll length
After counting the strips, the tool determines how many full lengths fit in a roll. An offcut that is too short does not automatically count as another strip. If a full length exceeds the roll length, the model stops: it does not allow for joints along the length. Choose a compatible size or orientation.
Compare without prescribing the material
You can swap length and width to compare the cutting direction when the product allows it. The result covers the quantity of garden fabric in rolls. It does not certify its geotechnical function, effectiveness against weeds or drainage behaviour. The appropriate overlap comes from the chosen instructions.
Strips = (width including edges − overlap) ÷ (roll width − overlap), rounded up, with at least one strip. Strips per roll = roll length ÷ cutting length, rounded down.
Three six-metre strips
For a 6 × 4 m area, with 1.5 × 10 m rolls and a 10 cm overlap, you need three 6 m strips. Only one full strip fits in each roll: three rolls are required, even though their 45 m² far exceed the ground’s 24 m².
Details to check
- Enter the overlap stated in the instructions.
- Check the allowances on all four edges.
- Compare orientations before choosing the roll.
Frequently asked questions
Why not simply divide the areas?
This division would overlook overlaps and length offcuts that cannot provide a full strip.
Can I add a joint along the length?
This model does not support it. Use a longer roll or draw up a specific plan with the intended joints.
Method and references · Editorial review: 25 October 2026
The geometric formulas are explained here. For a product, its packaging dimensions and coverage rate remain the reference inputs.