Sticking your vapor barriers and thermal resistance into places besides the exterior building shell can create odd interior dynamics.
Do i need faced insulation between floors.
Unless you have an extra 10 000 and a big hearted desire to create jobs in the insulation industry it makes no sense to insulate between floors.
Floor insulation can sometimes reduce the room temperature below the dew point.
Floor insulation can hamper the dynamic of vapour barriers and thermal resistance.
So in an attic the paper faces downward and in a crawl space it faces upward.
Install batting between the attic s floor joists.
The floor does not belong in the building envelope.
The batting material must be faced and at least as thick as the joists are wide so the batting is nearly flush with the top of the joists.
Doing so can even cause problems.
Sometimes adding insulation to the floor can cause problems for your home.
Any time you use a faced insulation the paper needs to be facing toward the living space.
The main reason why you do not need insulation on the floors is simple.