Jim K wrote:

On Mar 21, 8:22 am, harry wrote:
On Mar 20, 8:44 pm, Tim Watts wrote:

Jim K wrote:
Page 20, Paragraph 1.40
....."Flexible flue liners should only be used to reline a chimney
and should not be used as the primary liner of a new chimney.."

That is my understanding - and there's not much point anyway if a
chimney is being built as it's easier to use sectional clay liners or
whatever it is they use these days.

--
Tim Watts

Exactly so.
There are flexible liners specially for woodburners, some are twin
wall.

I believe *all* solid fuel flexible flue liners are twin wall
stainless steel.

Mine is heavy duty single wall - installed to current standards.

But that goes up a solid masonry chimney so the liner running hot is not an
issue - its primary prurpose is to prevent fume leakage and to "manage" the
updraught.

--
Tim Watts