Hi,
I am about to install another woodburner. I intended to fit flexy liner as recommended by building regs. Unfortunately although the top and bottom of the chimney are a good size, there seems to be a couple of feet in the middle where it narrows to about 5" deep (still about a foot wide).
The chimney is straight up from the fireplace into the attic, it then runs at about 45 degrees for a few feet where the chimney cuts over the fireplace in our bedroom and then rises straight up to the pot.
Having taken a couple of half bricks out to see what happens, the problem is that the stepped bricks on the sloping bit narrow it so that although a ball larger than the liner goes down with no problem, the liner itself isnt flexible enough to work through.
the stack at this point is only a single brick thick and is also running just below the roof. So I cant really do anything to enlarge the chimney on the top, and if I tried to take bricks out from the bottom of the slope I would break through into the top of the fireplace in our bedroom.
What would you do?
As I see it I can make sure that the chimney pointing is good, just put a register plate in at the bottom and use the chimney as is (I would put a smoke match in and check) - and put co detectors in the rooms adjacent.
Or I could get a 5" flexy liner in - but that is (a) smaller than the one I've bought
and (b) against the recommendations in building regs. (the stove has a 5" flue, total chimney height is about 7.5m)
I really dont fancy getting involved in any rebuilding work on the stack (there is a good 2m of vertical stack above the sloped bit.)
This is a brick stack built against a stone wall. I am guessing that it is somewhere between 200 - 250 years old.
I am about to install another woodburner. I intended to fit flexy liner as recommended by building regs. Unfortunately although the top and bottom of the chimney are a good size, there seems to be a couple of feet in the middle where it narrows to about 5" deep (still about a foot wide).
The chimney is straight up from the fireplace into the attic, it then runs at about 45 degrees for a few feet where the chimney cuts over the fireplace in our bedroom and then rises straight up to the pot.
Having taken a couple of half bricks out to see what happens, the problem is that the stepped bricks on the sloping bit narrow it so that although a ball larger than the liner goes down with no problem, the liner itself isnt flexible enough to work through.
the stack at this point is only a single brick thick and is also running just below the roof. So I cant really do anything to enlarge the chimney on the top, and if I tried to take bricks out from the bottom of the slope I would break through into the top of the fireplace in our bedroom.
What would you do?
As I see it I can make sure that the chimney pointing is good, just put a register plate in at the bottom and use the chimney as is (I would put a smoke match in and check) - and put co detectors in the rooms adjacent.
Or I could get a 5" flexy liner in - but that is (a) smaller than the one I've bought
and (b) against the recommendations in building regs. (the stove has a 5" flue, total chimney height is about 7.5m)I really dont fancy getting involved in any rebuilding work on the stack (there is a good 2m of vertical stack above the sloped bit.)
This is a brick stack built against a stone wall. I am guessing that it is somewhere between 200 - 250 years old.
