Big deals

PLUS ALL OUR LATEST OFFERS Shop now

Loft insulator calculator

Loft insulation calculator

This easy to use loft insulation calculator will calculate the amount of insulation you require to insulate your loft to the recommended thickness. Just enter the area in square metres of your loft, the current thickness of your loft insulation in mm and which type of insulation you would like to use.

View our 'How-to' guide for insulating your loft

To calculate the area of you loft, simply multiply its width by its length in metres.

Please only enter numbers into the fields below

Your loft:

Recommended loft insulation:

  • ................................................
  • ...........................
  • ...............................................