Chimney flue liner - Flexible flue liner
Installing a stainless steel chimney liner is an easy and economical way to repair an unsafe, deteriorated, or inefficient chimney. You will know how to install a chimney liner after reading our instructions (see Fitting a flexible liner) and you could do the job with common household tools.
A flexible flue liner should be installed to reduce the chance of a carbon monoxide leak, chimney fire, and creosote buildup. A chimney liner also improves the energy efficiency of the appliance and makes fireplace maintenance easier.
There are a number of other reasons why an old chimney may need lining;
- The flue is leaking smoke and fumes.
- Condensates or tar are seeping through the chimney. This causes staining, inside or outside the building.
- The flue is too large for the type of appliance being used. The smoke will cool down, and drawing is negatively affected.
- The flue is too cold, particularly if on an outside wall, and is not drawing properly.
- If the chimney has a stainless steel chimney liner, but with the liner fitted the wrong way up, therefore tar and condensate leakage may occur.
- The old flue surface is eroded and rough, causing friction to the flow of the gases resulting in poor updraught.
Determine the appropriate size chimney liner for your specific setup. The chimney flue liner diameter size you will need is the same as the size of the exhaust hole on the appliance. The flexible flue liner length you will need will equal the height of the chimney. We recommend you order over that amount to give room for error.
A flexible flue liner is designed for re-lining an existing masonry chimney. It can only be installed in a chimney and has to be totally enclosed within it. A flexible liner in wood, plaster board, or similar, is not acceptable.
Flexible flue liners are manufactured with two skins of stainless steel 316 L or 904L and are suitable for gas, oil and multi-fuel, including wood burning appliances where the maximum flue gas temperature does not exceed 600°C.
The flue liner legally needs to be a minimum of 6" in diameter if you are burning wood. Unless when you instal a DEFRA approved stove with a 5" flue outlet, in which case you can use a 5" liner.
These highest quality stainless steel will ensure that the liner you choose will last for many years.