Block off plate or just insulate?

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CheaperthanYou

New Member
Feb 11, 2013
31
Levittown
Quick question, with I am sure a million answers. I'm I takin a century insert with 6" SS flex liner In my levitt Ranch. Internal chimney central to the house.

I was wondering if a full metal block of plate is necessary, or could I just stuff insulation in he lower half. Like is the metal necessary, or could I use a metal mesh to keep the insulation up.


The top will be sealed to the masonary with a stainless cap as well

Thanks
 
You will probably be ok without a block off plate on an interior chimney as long as there is a full liner. Stuff the top as well as the bottom with roxul or kaowool.
 
The insulation will work, but won't stop air flow like a plate will.
 
So at least a thin metal is needed to stop airflow
 
I just used roxul, thing blasts out the heat. Pack it in good
 
An actual metal plate isn't needed, but it does give it a more permanent install. With as easy as light gauge tin works, I would work one up and get it in place and then seal around it.

Ya ever see 10 year old insulation that somebody shoved into a corner (or whatever). It always seems to get funky and ratty. Just my pref for a life time solution.
 
Unless you seal the surround to the surface behind it, relying on the surround is useless.
For what a block off plate costs, vs. the benefits, many here use one.
As with all advice, take some with a grain of salt.
Not all advice even on here is always the best advice.
 
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Quick question, with I am sure a million answers. I'm I takin a century insert with 6" SS flex liner In my levitt Ranch. Internal chimney central to the house.

I was wondering if a full metal block of plate is necessary, or could I just stuff insulation in he lower half. Like is the metal necessary, or could I use a metal mesh to keep the insulation up.


The top will be sealed to the masonary with a stainless cap as well

Thanks
Stuff the top of the flue around the liner with ceramic wool or equivalent. Much easier to do, and it keeps cold air from coming down around top plate when stove is not in use.
 
No block off plate, no insulation, capped & sealed at the top, center chimney. Not quite a Levittown layout, but similar (unless you have been added onto, my Uncle had a Levitt house with a center chimney).

House stays toasty even when it's bitter cold outside.

YMMV :)
 
No block off plate, no insulation, capped & sealed at the top, center chimney. Not quite a Levittown layout, but similar (unless you have been added onto, my Uncle had a Levitt house with a center chimney).

House stays toasty even when it's bitter cold outside.

YMMV :)
I thought my house was toasty until I put the roxul in. Then it was actually hot.
 
I've been thinking about this since I posted.... the chimneys are getting cleaned this weekend. Not to hijack, but as I can't remove the insert myself, would it be Ok to put some roxul up around the top of the liner only?
 
It would be a start. A better than nothing kinda thing. But if you can I would see what they would charge to put it in your damper as well.


DYI annual preseason cleaning.
 
thanks I went with both, loving it
 
After I opened up damper frame and removed few fire brick I installed 8 inch liner and insulation then fabbed up my own block off plate using fire board from lowes. I made to brackets that hang on remainder of frame and then bolted up board using toggle bolts.

DSC04155.JPG
 
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