Use the calculator below to get a better idea of the number of bags of vermiculite insulation you need to complete your installation. Click here to go to our vermiculite insulation
How many bags of vermiculite do I need?
Enter the details of your chimney and liner below and click calculate to estimate the number of bags of insulation that you will require.
Please note that all dimensions need to be entered in metres, for example, 130mm (5 inch) chimney liner would be an entry of .130