Foam it green spray foam insulation can be combined with other insulation to make a powerful hybrid method.
Combining rigid foam and batt insulation.
Researchers who have measured the moisture content of rim joists with rigid foam on both sides haven t discovered any problems the moisture content of the rim joists isn t worrisome.
Flash fill flash batt using 2 different types of insulation for lower cost.
Flash and batt is a combination of spray foam insulation with fiberglass batts.
Airspace rigid foam batts vapor barrier plastic drywall.
Understand that the function of the vapor barrier is to prevent moisture from migrating from the warm side into the total thickness of insulation towards the cold side where at some point the temperature gradient will drop.
You can use a variety of insulation materials.
Yes foam board insulation is an excellent complement to batt insulation.
Also squeezing an r19 batt into the remaining space will reduce the performance of the batt.
Cutting rigid foam board to fit between studs will be labour intensive and will not offer any significant improvement to your wall s thermal performance.
Nor will that approach address thermal bridging through the studs.
The layering is from the outside inwards roof 1 in.
You can get similar results as doing all closed cell foam but with less cost.
It can potentially replace the vapor barrier and house wrap as well.