Rednadnerb wrote:
If you have a woodburning stove then need to have a stainless steel
flexible flue

Only premissible if te existing flue is sound.

And generally a Bad Idea for a wood stove. Use solid insulated double
walled STAINLESS STEEL. Aluminium corrugated will not survive a chimney
fire, or even a good roaring fire.



I
think the question should be: do you need to re-build the stack or is
there a cheaper way of venting the fumes?

It is permissible to take a stainless steel flue straight through a
timber framed roof with no stack whatsoever. Just a pipe sticking up,