Hi,
I have read a lot on here over the last year but still have one lingering question.
Should I remove the liner, remove clay tiles then insulate and reinstall? I will describe the install as best I can.
1949 heat form with 4 natural draft vents in the brick face. No rust through of soot shelf. Vents now closed.
Fireplace is in basement of 1 story ranch with internal chimney that has a separate
Clay flue for furnace.
Existing clay tiles intact but motor joints at the top are gone. Full brick chimney, one course only till the attic when it steps up to 3 courses before the box framing for roof.
23' tall 6" corrugated liner. Vertical flue is 7x11 I.d. with 14" offset. Cut the old soot shelf and removed damper to accommodate the new liner (full length to new cap). Obviously I did not have the room for ceramic wrap.
Installed throat plate and back filled with poured vermiculite. There are most certainly locations where the stainless liner touched the clay.
Two sides of the chimney are finished with plaster. The other 2 sides had walls built directly against them. It also had the box framing for the basement ceiling and first floor ceiling actually stuck in the mortar for the brick.
So being as obsessive as I am I tore it all out. Cleaned up the mortar buggers and skimmed with 7/8" to 1" type s mortar.
Then reinstalled the box framing and walls 3" from the sides of the chimney. Installed wire mesh on the rear of the wall studs then insulate with Rockwool. The only contact is the edge of the subfloor on the furnace side and rear.
Other than the subfloor there is no contact with the chimney until the roof framing (3 course brick)
My concern is safety. So should I remove the clay the wrap the liner or leave it as is?
Joe
I have read a lot on here over the last year but still have one lingering question.
Should I remove the liner, remove clay tiles then insulate and reinstall? I will describe the install as best I can.
1949 heat form with 4 natural draft vents in the brick face. No rust through of soot shelf. Vents now closed.
Fireplace is in basement of 1 story ranch with internal chimney that has a separate
Clay flue for furnace.
Existing clay tiles intact but motor joints at the top are gone. Full brick chimney, one course only till the attic when it steps up to 3 courses before the box framing for roof.
23' tall 6" corrugated liner. Vertical flue is 7x11 I.d. with 14" offset. Cut the old soot shelf and removed damper to accommodate the new liner (full length to new cap). Obviously I did not have the room for ceramic wrap.
Installed throat plate and back filled with poured vermiculite. There are most certainly locations where the stainless liner touched the clay.
Two sides of the chimney are finished with plaster. The other 2 sides had walls built directly against them. It also had the box framing for the basement ceiling and first floor ceiling actually stuck in the mortar for the brick.
So being as obsessive as I am I tore it all out. Cleaned up the mortar buggers and skimmed with 7/8" to 1" type s mortar.
Then reinstalled the box framing and walls 3" from the sides of the chimney. Installed wire mesh on the rear of the wall studs then insulate with Rockwool. The only contact is the edge of the subfloor on the furnace side and rear.
Other than the subfloor there is no contact with the chimney until the roof framing (3 course brick)
My concern is safety. So should I remove the clay the wrap the liner or leave it as is?
Joe
