Re: My First (hopefully last) build - Cast Refractory
Arch fitted.
Joining faces were chamfered to provide a channel for insulation fill.
Used some cementone fire cement to seal the inner joint of the arch/dome, about an 8mm gap. Checkd with manufacturers (Bostik) who reckon this stuff is good for pointing up to 14mm, so we'll see.
From outside the 8mm to 25mm chamfered joint was backfilled with vermiculite/sifted refractory mix.
If this crumbles - the fire cement should hold it in. If the fire cement crumbles also - plan B (which I have yet to devise!).
Fitted a 7" flue pipe (3ft length). Experimenting so just used some tin foil jammed around it as a seal.
Had a firing - almost all smoke drawn straight up the flue from cold.
A few wisps out the front of the arch, but nothing much, and the whole flue arch is only 10" deep. Still not fitted a decorative arch yet, so time will tell.
Arch did not get very hot and it was a fair sized fire.
How much insulation would anyone recommend for the flue arch??
Arch fitted.
Joining faces were chamfered to provide a channel for insulation fill.
Used some cementone fire cement to seal the inner joint of the arch/dome, about an 8mm gap. Checkd with manufacturers (Bostik) who reckon this stuff is good for pointing up to 14mm, so we'll see.
From outside the 8mm to 25mm chamfered joint was backfilled with vermiculite/sifted refractory mix.
If this crumbles - the fire cement should hold it in. If the fire cement crumbles also - plan B (which I have yet to devise!).
Fitted a 7" flue pipe (3ft length). Experimenting so just used some tin foil jammed around it as a seal.
Had a firing - almost all smoke drawn straight up the flue from cold.
A few wisps out the front of the arch, but nothing much, and the whole flue arch is only 10" deep. Still not fitted a decorative arch yet, so time will tell.
Arch did not get very hot and it was a fair sized fire.
How much insulation would anyone recommend for the flue arch??
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