Submitted by Crudeyakuza t3_zxsupj in DIY
Liberty-Justice-4all t1_j22oxvj wrote
Reply to comment by dablakh0l in Help filling in Air Conditioning Hole in my Room. by Crudeyakuza
This is the answer.
2 inch is overkill though, two layers of half inch or so one at the outside and one neat the inside of the opening will be THE most insulated part of your wall.
The stuff is incredibly light, incredibly easy to slice with a boxcutter, and incredibly incredibly insulative.
Cut it intentionally a bit bigger, put it in diagonally and push it towards being flat.
It will wedge and seal like the dickens as you shove the leaning sides.
Then do another one or so their is air space between them.
Measure your hole before you go and cut with 2 inches spare there.
(These things are cheap, but come in huge sheets that are a pain to transport)
Then stick the spare stuff in the back of your closet and haul it out whenever you want to be constructive over the years.
Pulaski540 t1_j27mg51 wrote
Take measurements before you buy it, then cut it to size in the parking lot outside the store where you bought it. ... I have been known to take a T-square and a handsaw with me to Lowe's to cut timber or boards even though I own a pickup. Sometimes it is just that much easier to carrying material already cut into smaller pieces.
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