I'm finishing an unfinished second floor. It'll be a lot like most attics. I'll have a 4' knee wall, then a 5' slanted section and 6' wide ceiling. My rafters are 5'6" deep, so I'm assuming I need to spray foam that area. In an effort to keep cost down. Is it possible/advisable to staple in fiberglass insulation in the knee walls and ceiling where I have plenty of room. And only spray foam the slanted ceiling areas?
Thanks.
Spray foam would be my last choice. You want to maintain venting
Air tight electric boxes
1. solid blocking under edge of floor and sealed, no air from house to attic.
2. 2x4 or 2x6 added to slope to allow for more insulation.
3. air chutes to allow air above insulation.
4 soffet vents
5. batt insulation to stop loose insulation out of the soffet
6. High vent boxes or ridge
7 . loose fill insulation
8. Just enough strapping to hold the insulation in the wall.