Function(s) of a finishing band

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Hand_Splitter

New Member
Dec 22, 2021
2
Austerlitz, NY
I had a Hearthstone Green Mountain 40 installed by a contractor in 02/2021. I was, and am increasingly with time, unsatisfied with their installation for a number of reasons.

Will point to just one reason here. Recently swept the chimney for first time and realized while re-assembling that the installers had failed / forgotten to install a component of the Selkirk DSP Vertical Kit: the finishing band. So what I have at the ceiling is the M Class A crimp seated in the F stovepipe crimp.

Before I order a replacement band, I'm interested in determining how necessary it is. Does it serve a function beyond the merely cosmetic? Perhaps it is required as a functional equivalent to a 3-screw fastening?