Build up the height of the joists prior to installing flooring when the insulation reaches the tops of the joists. Put on work gloves, safety glasses and a dust mask before entering the attic.
Wear long sleeves and pants since fiberglass insulation irritates the skin if it comes into contact with it. Walk to one end of the attic by carefully stepping only on the wooden ceiling joists. Place a 2-inch by 3-inch board directly on top of the joist nearest to the edge of the attic, with its largest surface touching the joist. Position it in a straight line parallel to the joists, so that you are raising the height of it above the insulation. Drill a 3-inch wood screw through the board and into the underlying joist using a power drill.
Insert additional screws in the board every 2 to 3 feet. Install additional 2-inch by 3-inch boards end to end until you reach the other end of the joist. Ann Arbor. Without removing the flooring, you have the option of blowing loose-fill insulation fiberglass or cellulose fiber over the top of the floor. This, of course, would preclude using the area for storage. But if that isn't a problem, then covering the floor with insulation would be one relatively easy solution.
Another idea would be to roll out fiberglass batts on top of the floor. Butted tightly together, they would improve the thermal performance of this part of your attic. And, if you did wish to use the floor for storage at some point, you could simply roll up the batts and remove them or, better, pile the unwanted ones on top of the others to increase the thickness of the insulation.
However, removing any of the batts or leaving an area clear for storage in the first place would severely compromise the effectiveness of the overall installation. It's much better to have insulation covering the entire floor area, in particular given the hollow space beneath the floorboards. In this circumstance, heat rising into the hollow area would migrate quickly to the uninsulated portion of the floor. Yet another and probably the best option, though it would entail more work, would be to fill the hollow area between the joists and the underside of the floor with blown-in cellulose fiber insulation - and then put more insulation on top of the floor.
This could be accomplished by boring holes in the floorboards and inserting the nozzle of an insulation blower machine into the holes. Even if permitted by your community, converting an attic to a living space is a complex project that most homeowners are not prepared to tackle. It involves installing outlets, switches, and potentially water-supply lines and drainage pipes if a bathroom will be added.
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