Vermiculite In Chimneys

This stuff absorbs and retains water so if your chimney leaks water at all the insulation material will gradually get wetter absorbing like a sponge.

Vermiculite in chimneys. A chimney that is 13 long x 13 wide and is 15 tall with a 6 liner installed needs 8 bags of fireflex mix. When radiant heating pipes are laid in buildings they may be placed on top of a vermiculite concrete screed. 20 bags at 20 per bag. For this application a 6 1 mix is normally used.

The house is now about 100 years old i will be lining the chimney with a flexible 904 liner. The mi flues screw fix insulation back filler is a new concept to make the job of back filling your chimney with vermiculite as easy as possible when using a. In residential domestic chimneys vermiculite concrete mixes can be used for extra insulation between brickwork flue and liner. 100litre bag of vermiculite insulation for backfilling the chimney around the liner.

It can be used to pour back down the chimney filling the void between the brick chinmey and the flexible flue liner. Vermiculite is irritant free ultra lightweight non toxic odour free and fire proof up to 1300 degrees centigrade. Vermiculite is a light weight naturally occurring mineral which is an excellent heat insulator. I have been told that i should have the chimney back filled with vermiculite after the liner has been fitted.

Vermiculite gives perfect coverage of insulation in difficult to reach places as well as an easy to manage level fill. This will stop the new flue moving about when being swept provide insulation. 100litre bag of vermiculite insulation for backfilling the chimney around the liner. It can be used to pour back down the chimney filling the void between the brick chinmey and the flexible flue liner.

I have my reservations about these methods. Micafil is typically used for chimney flue linings.