Plywood In Attic Over Insulation

As such adding a floor can cause the insulation to compress thus reducing the efficiency of the fiberglass insulation.

Plywood in attic over insulation.

Most attics are dry plywood is a smart vapor retarder with variable permeance. But if the floor is covered in plywood you can t stuff enough insulation beneath it to do the job sufficiently not even in warm climates. In most houses getting a 4 by 8 sheet of plywood into the attic is nearly impossible without cutting a bigger hole in the ceiling. Ensuring adequate insulation under the flooring to give yourself enough space to ensure adequate insulation under the flooring construct a riser of 2 x 4 s in the attic over the existing joists.

If you can do it there really are no down sides except the. Before you lay your plywood onto the joists check to see if your insulation is couple of inches above the height of the joists. So you can put 8 inches of insulation down then put the plywood over that. Put on work gloves safety glasses and a dust mask before entering the attic.

How to lay attic flooring on top of fiberglass insulation. So what you might want to do is sort of map out an area in the center of the attic where you have your storage and then the rest of the area you could put more insulation that could possibly fit under that plywood. Since an average attic needs 16 inches or more of insulation the insulation is always thicker than the ceiling joists or trusses. Leaving part at r 19 is fine the rest will still be beneficial.

Tips and tricks to make attic flooring easy plywood floor in attic of older home. Plan to pull up the flooring and layer new insulation on top of the old. Make sure you don t block the air flow from the soffits. Now in your particular part of the country you re going to want a lot more insulation than that.

That s clearly your plan if any moisture makes its way to the plywood the damp plywood will dry out on hot sunny days. Because the simplest and cheapest way to insulate an attic is to add material to the floor. Technically you should pull the plywood but adding insulation above will actually keep the wood warmer and reduce the risk of condensation. If you lay plywood and it squishes and compacts your.

If necessary block around them with plywood or corrugated cardboard to prevent the insulation from piling up on the vent. 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. Wear long sleeves and pants since fiberglass insulation irritates.