stovesonline telephone contact logo 0845 226 5754

Lining a truncated chimney and using twin wall flue for the roof penetration

Coping with a chimney that has been truncated.

It is quite common to find that an existing masonry chimney stack has been truncated so that it does not penetrate the roof. The may been many reasons why the chimney was truncated, for example the stack may have been in very bad repair and not in use so it might have been cheaper and quicker to simply remove the portion of the stack above the roof. The roof might have been replaced and it might have been decided that the chimney stack would not be needed. Whatever the reason for having a trucated stack it means that installing a stove is not quite as simple as it might be.

You would normally line and insulate the chimney with a flexible chimney liner right to the top of the stack, but of course the stack now terminates in the loft.

The solution is to line and insulate the stack to the top with a register plate at the bottom (as normal) and a fixing clamp installed into the masonry chimney to take the weight. The top of the stack should be made good and a flat surface provided for installing the anchor plate. The anchor plate lets you join the chimney liner to selkirk stc twin wall flue pipe, and also takes the weight of the twin wall flue pipe.
From the anchor plate up Selkirk twin wall flue pipe is used to penetrate the roof and to rise up to the required height. Fixing and flashing components are available to make this easy for a wide variety of roof types.

Lining a truncated chimney stack and then using selkirk stc twin wall flue through the roof

For further technical advice, chimney and flue design and consultancy please contact us on 0845 226 5754

If you would like us to design your truncated flue system then please give us a few measurements and details on our truncated flue design form.

If you would like us to design your (non truncated) flue system then please go to the flue design service section of this site.

stovesonline are members of regensw stovesonline are members of the LILI network stovesonline saving on C02
pay for your stove by visa pay for your stove by mastercard pay for your stove by maestro pay for your stove by delta card

Stovesonline Ltd, Flightway, Dunkeswell Business Park , Dunkeswell , Devon , EX14 4RD
0845 226 5754 | | 01803 864561,, Contact Us
© Stovesonline Ltd. VAT: 801261871, Company: 04636920. Registered in England, UK