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I intend to insulate my exterior wall, brick on 2 X 4 construction,that has no insulation. I will replace the single pane steel casement windows at the same time. I would like to use unfaced FG, R-11 or R-13, with rigid board on the interior with 1/2″ drywall on top.
3/4″ foil faced polyisocanurate is available locally at excellent pricing. What is the R value for the 3/4″ poly? Does the foil facing on both sides create a problem of any kind?
Appreciate any feedback.
Replies
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I intend to insulate my exterior wall, brick on 2 X 4 construction,that has no insulation. I will replace the single pane steel casement windows at the same time. I would like to use unfaced FG, R-11 or R-13, with rigid board on the interior with 1/2" drywall on top.
3/4" foil faced polyisocanurate is available locally at excellent pricing. What is the R value for the 3/4" poly? Does the foil facing on both sides create a problem of any kind?
Appreciate any feedback.