Vermiculite Calculator

Vermiculite is a high temperature insulation, suitable for wood burning stoves, gas fires and other boilers. It will insulate your Flexible Flue Liner, extending its life, increasing its efficiency and reducing the amount of heat loss through your chimney. Pouring down from the top of the chimney, use Vermiculite to fill around your Chimney Liner, above your Register Plate for the best installation. Highly advised for brick chimneys on external walls.

Use Glowing Embers’ Vermiculite calculator below to get a better idea of the number of bags of Vermiculite insulation you need to complete your installation in an existing chimney.

Vermiculite Calculator
Vermiculite bag

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 must be entered in metres, for example, 130mm (5 inch) chimney liner would be an entry of .130

Chimney Height (Metres) 8
Chimney Width (Metres) .225
Chimney Depth (Metres) .325
Liner Diameter (Metres) .150
Required Volume of Insulation (M³)  
Number of Bags Required