So in an attic the paper faces downward and in a crawl space it faces upward.
Do i need faced insulation between floors.
Sticking your vapor barriers and thermal resistance into places besides the exterior building shell can create odd interior dynamics.
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.
The main reason why you do not need insulation on the floors is simple.
The floor does not belong in the building envelope.
Floor insulation can sometimes reduce the room temperature below the dew point.
Any time you use a faced insulation the paper needs to be facing toward the living space.
Floor insulation can hamper the dynamic of vapour barriers and thermal resistance.
Doing so can even cause problems.
Faced or the type with paper is typically used in first time applications such as in walls ceilings floors and in crawl spaces.
Install batting between the attic s floor joists.
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.