Insulated flues improves the draw.

Do we need to insulate when we fit a chimney liner?

  • If the chimney is exposed (on an outside wall), 
  • the stack is particularly tall, or 
  • the flue is of a large diameter

then the answer is a definite YES! Insulated liners keep the flue gases warmer, increase the upward speed of those gases and help prevent condensation.

Otherwise it is not necessary. The air between the liner and the flue will insulate the liner.

However, it is not difficult to insulate a liner (it just adds cost) so it is up to you. 

Chimney wrap

insulated chimney liner

Installing with a chimney wrap: Instead of feeding the flue down the chimney, you haul it up the chimney. The person at the top has to have a very secure platform (e.g. scaffolding). A cherry picker might work but add the liner and wrap weight to the maximum allowed by the cherry picker. 



Vermiculite (Micafil) is supplied in bags. It is very light and will be taken by the wind easily.

Vermiculite cannot catch fire and is used to insulate chimney liners.

Isolate flue linerIt is poured into the top of the chimney and will cascade down the chimney onto the closure plate, filling the gap between the liner and the chimney itself all the way to the top.

Vermiculite is only suitable for chimneys with a few inches of air gap.  


What other people are saying about us:

Stove pipe customer

"Very good price!!"

"Easy to order; Good quality; Delivery next working day. Fab "
Steve Kemp -  Market Rasen

Stovepipe customer

"Loved the support"

"Very rapid delivery and well packed. All items in excellent condition. Thanks dad for the installation!"
Carolyn Mckinnon - Bath



6 inch stove pipe customer

"Easy job of just a few hours..."

"All well packed on time and unmarked and cheaper than anywhere on the web. "
H. T. Edwards - Birmingham


Rate this page

  • Leave a name and email adress if you wish to be contacted