flue liner

[evdama]

Woodburner.
Brick (modern) chimney stack,capped, save for flue and rain cowl exit.
Stainless flexible liner.
Condensation forming inside brickwork ,drips down onto top plate which has rusted as a result.
Happens only when fire is lit.
Happens even when it hasnt rained for days.

Q.Is ventilation the answer/allowed

If so where?
In the plate ?
In the chiney stack?

Ideas appreciated.

 

[wilhelm]

u might need to insulate the liner, as sounds like flue gases are cooling. (well i think they are )

disclaimer, ........before i get fkkn pilloried, i am only guessing ..so put that in ya flue and smoke it