Do I Need Faced Insulation Between Floors

Sometimes adding insulation to the floor can cause problems for your home.

Do i need faced insulation between floors.

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 biggest concern that can happen due to floor insulation is mould. Unfaced insulation the type without paper is what you would use if you are adding insulation to your attic or to place between floors when living space is above and below.

Faced or the type with paper is typically used in first time applications such as in walls ceilings floors and in crawl spaces. Any time you use a faced insulation the paper needs to be facing toward the living space. Install batting between the attic s floor joists. Floor insulation can sometimes reduce the room temperature below the dew point.

So in an attic the paper faces downward and in a crawl space it faces upward. Doing so can even cause problems. Sticking your vapor barriers and thermal resistance into places besides the exterior building shell can create odd interior dynamics.