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Caroline
How to seal chimney thimble hole
Caroline

I have two unused chimney thimble holes in the kitchen, both with a 6 1/4" diameter. I tried the 6" Insul-Plug and it did not expand enough to fit, the next size up is too large.

The chimney is currently only used as the water heater vent.

How can I permanently seal these? We are remodeling our kitchen and are framing/hanging drywall right up to one of the holes.

Thanks!

Jack
Re: How to seal chimney thimble hole
Jack

Mortar and pieces of broken bricks usually work. I would suggest however that you extend the WH flue pipe up and out of the chimney then cap the rest of the chimney off.
Jack

Caroline
Re: How to seal chimney thimble hole
Caroline

Thanks JL.

Broken bricks, now those I have on hand!

The water heater is already vented out the top of the chimney and is capped as you suggested.

Thanks again!

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