How To Install Insulation In Attic Floor

If your attic joists won t bear the weight necessary to finish out a living space but the engineer cleared them to support floor decking for light storage you can install inch plywood or.

How to install insulation in attic floor.

The insulation should fit snugly against the subfloor and between the joists. Build up the height of the joists prior to installing flooring when the insulation reaches the tops of the joists. However if you keep the storage weight to a minimum you may be able to build a storage platform above the insulation by attaching supporting beams to the sides of the trusses. If using insulation with a vapor retardant facing install the material with the vapor retardant side down.

Attic insulation between roof trusses. First you ll need to measure the area you want to floor so you can calculate how much wood you ll require. Begin at a wall and work toward the center of the attic floor or the entryway carefully placing insulation between joists and ensuring a snug fit. 1 put on work gloves safety glasses and a dust mask before entering the attic.

Even easier you can also use a prefabricated attic floor kit designed specifically to raise the attic floor above the insulation. You ll have to construct a wooden frame or sub floor with boards 16 inches apart to provide extra support for the floor. To build a catwalk you would usually elevate a section of the framing perhaps with 2x6s installed at 90 degrees to the joists and you would install osb or plywood on top of the elevated framing. Start at one edge of the crawlspace and install the insulation between the floor joists.

Make sure each run contacts the insulation you installed at the header band joists. To floor an attic you ll need to install a sub floor for support before laying your plywood floor. Whether using loose fill or batts put the vapor barrier closest to the warm side of your installation where hot moist air would get in facing the house s interior in cold climates beneath floor insulation and the attic s interior in hot climates on top of floor insulation.