Attic Storage Over Blown Insulation

Laying plywood in attic over insulation is a simple way to add storage and keep your home efficient. By raising joists, securing plywood, and checking ventilation, you can create a safe, useful space. We have no basement and a small garage so it'll have to be our main storage area, so I'm hoping to make it user-friendly and as easy as possible to move around in.

There is blown-in insulation, and there is conflicting information out there about how to add flooring of some kind without compressing the insulation. Attics are great for storage, but flooring directly over the attic floor joists doesn't provide room for the recommended 12" to 16" of attic insulation needed to keep your house cool in the summer and warm in the winter. To solve this problem, construct a raised platform from 2×4 or 2×6 lumber placed on edge, add insulation between the joists, and then cover it with 1/2″ plywood.

My attic has blown insulation and wanted to store stuff up there, but there is not much surface area except for the furnace. It looks like I have blown insulation and has a measurement of how much is supposed to be there. Here are 3 ways to use the attic for storage without compromising insulation performance (R-Value.) This applies to Chicago Area specifically.

Take a look! Attics are generally covered in batting or blown insulation. 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.

Plywood can be installed over insulation in the attic to create storage room. The ceiling joists should be built up to above the line of insulation so that the plywood does not compress it. Cross beams can be added for extra support.

Care should be taken to prevent moisture being trapped under the plywood. I am the new owner of a brand new contractor grade Colonial home, and would like to install a small storage area in the attic, at floor level. The problem is, in addition of having the standard pink insulation in between the joists, I also have about 16″-20″ of blown in white insulation.

The process of adding batt insulation directly over existing loose-fill, or blown-in, material is feasible for increasing attic thermal resistance. This strategy is often employed when the existing material, typically cellulose or fiberglass, has settled or when energy codes require a significantly higher total R. You can insulate your attic yourself with blown.

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