Insulation where new liner enters existing chimney

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Matttc

New Member
Sep 17, 2022
10
Wisconsin, USA
hi. I am in the middle of having a Travis Industries large flush wood insert installed into an existing prefab ZC fireplace (just waiting for surround panel to be custom cut).

The manual states, “ to prevent air from passing up the ZC fireplace chimney (the gap between the liner in the chimney) we recommend sealing the area near the damper. Use non-combustible material to seal this area (non-backed fiberglass insulation or kaowool).”

This is an interior chimney.

I’ll check with the installer, too, but I assume the experts here think closing off this gap is a “must-do”?

Also, opinions on plain old non-backed fiberglass insulation vs kaowool?

thank you

038CAAB7-1629-463C-9D27-9B2C83C14622.jpeg
 
hi. I am in the middle of having a Travis Industries large flush wood insert installed into an existing prefab ZC fireplace (just waiting for surround panel to be custom cut).

The manual states, “ to prevent air from passing up the ZC fireplace chimney (the gap between the liner in the chimney) we recommend sealing the area near the damper. Use non-combustible material to seal this area (non-backed fiberglass insulation or kaowool).”

This is an interior chimney.

I’ll check with the installer, too, but I assume the experts here think closing off this gap is a “must-do”?

Also, opinions on plain old non-backed fiberglass insulation vs kaowool?

thank you

View attachment 300871
What make and model fireplace is the insert being installed in? You need to consult that manual as well
 
Read item d on page one of your fireplaces manual

Screenshot_20221019-170208.png
 
Arrgh. My Travis Industries manual says Marco is an acceptable make in which to install the fireplace (didn’t mention specific models). Hmmm…
 
Arrgh. My Travis Industries manual says Marco is an acceptable make in which to install the fireplace (didn’t mention specific models). Hmmm…
You would need to get blessing from Marco in writing to make it code compliant