Hello I'm finishing my atticI have small window dormers on the front of the atticThese were constructed such that I only have a cavity depth of 1 1/2quot;That is my only option for depth as I would block the window if I make them any deeperShould I put in R13 and compress it against the sheetrock, or I was thinking of cutting Polystyrene between each oneWhich would give me the best R-Value?
the first 2 solutions are one hundred% incorrect! they have used the incorrect numbers interior the equationsNow you suggested Iron Oxide.which? There would properly be Iron (II) Oxide - FeO or Iron (III) Oxide - Fe2O3 (that is Rust and is pink-brown) because Fe2O3 is rust, im guessing you're searching at FeOSo, for Iron (II) Oxide - FeO 2Al + 3FeO - Al2O3 + 3Fe For Iron (III) Oxide - Fe2O3 2Al + Fe2O3 - Al2O3 + 2Fe All numbers behind elements are in small.
Your best bet would be a blown on foam insulationIt will expand to fill the cavities and give you the highest R and sealingAs a close second choice I would use the sheet styrofoam and seal the edges with a minimal expanding foamDon't compress the fiberglass into the cavity as it will greatly reduce the R value and be the least effective.
