How To Floor An Attic Over Insulation
In zones 4 through 8 if you have full height insulation over 100 of the ceiling including the top plates as shown in your excellent guide here the iecc allows r 38 rather than the r 49 that is required if you can t achieve full depth insulation over 100 of the attic floor.
How to floor an attic over insulation. How to insulate a finished attic. A finished attic should be insulated much like the rest of the house with insulation in the walls and ceiling. If blown in insulation is used control the height or thickness of the layers so boards can by laid over top without having to compact the filler. 1 put on work gloves safety glasses and a dust mask before entering the attic.
By adding the boards you increase storage space for items not needed. Place flooring over insulation to make your attic space functional. Without removing the flooring you have the option of blowing loose fill insulation fiberglass or cellulose fiber over the top of the floor. With a finished attic insulation must help keep the attic areas comfortable.
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. Attics are generally covered in batting or blown insulation. 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.
This will make the installation of these new joists easier. Even easier you can also use a prefabricated attic floor kit designed specifically to raise the attic floor above the insulation. This of course would preclude using the area for. Attic insulation between roof trusses.
Work from the perimeter of the attic toward the door or hatch so that you don t trample all over the insulation you just put in. Build up the height of the joists prior to installing flooring when the insulation reaches the tops of the joists. The joists for this riser should run perpendicular to the existing ceiling joists.