Loft insulation calculator
Work out how many rolls you need.
Enter the loft size, choose the roll type, then press calculate. Your estimate will stay visible underneath.
Your estimate
Press calculate to see your estimate
- total area
- rolls needed
- estimated cost
The estimate includes your extra allowance and recommends the best value matching roll.
View loft insulation rollsThis is an estimate only. Always check joist spacing, loft obstructions, ventilation gaps and existing insulation depth before ordering.