Our house has two large masonry fireplaces which we never use.
In Winter, these are a source of cold air entering the house. The
dampers are closed, but still a lot of cold air is admitted thru these
fireplaces. Over the Summer, I want to insulate these openings so
they don't allow cold air to come in next Winter.
Thought I would get some styrofoam board and cut a plug to fit the
from opening of the fireplace.
Would appreciate any other ideas anyone may have.
I looked into glass doors and 99% have air gaps, Zero sealing, only
maybe 1000 $ units looked good to stop air with only R 1
I took 3/4" L angle iron steel from Ace l and screwed them all around
inside my fireplace with Tapcons Then 4" foamboard and stuck 1/2"
stripmagnets on the foamboard , I painted the foamboard the color of the
fireplace. It pops in or out and has 100% airtight seal with R 20 Cost
apx 20 $ and all that cold is kept out.
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