Question: Can You Put Plywood Over Insulation In Attic?

Should attic have vapor barrier?

If you insulate the attic floor, it is also important to have a vapor barrier in place, to prevent warm, moist air from rising into the chilled attic from the living space below.

The moisture will condense on the wood and insulation, reducing the insulation R-value and encouraging the growth of mold and mildew..

Should insulation be covered with plastic?

Fiberglass insulation will not degrade unless exposed to water. The fiber could become airborne if a vent is blowing on it or it is disturbed in some way. It can be covered with a plastic vapor barrier to protect your home air quality. … The plastic can be bought at any big box store.

Can you put a floor in the attic?

Adding a floor to an attic can increase storage space or create a new room. Before you start creating a floor for your attic, you must make sure that it can handle the additional load. Then, you’ll need to build a grid-like structure that can hold up the plywood flooring.

Is it OK to put flooring over blown in insulation?

Place flooring over insulation to make your attic space functional. 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.

What type of plywood should I use for attic floor?

For joists spaced 24 inches OC, use thicker, ¾-inch plywood to prevent sagging between them. If you’re familiar with basic carpentry and framing techniques, installing decking for attic storage is a DIY-friendly project.

How much blown insulation should be in the attic?

The higher the R-Value, the better the thermal performance of the insulation. The recommended level for most attics is to insulate to R-38 or about 10 to 14 inches, depending on insulation type.

How much does it cost to have insulation blown in attic?

Blown-In Attic Insulation Costs The cost to insulate an attic with blown-in insulation runs from $600 to $1,200, assuming it is 1,000 square feet in size. If you choose to hire a professional, expect to pay from $40 to $70 an hour for labor in addition to the cost of materials.

Should you put plastic between insulation and drywall?

The standard installation of a plastic vapor barrier is between the studs and the drywall, but there are some exceptions to this. In exterior walls that are below-grade, like basement walls, plastic should not be used at all. Some applications require a different use of plastic vapor barriers.

Is my attic strong enough for storage?

As long as they are not damaged, the joists should be strong enough to allow you to move around in the attic for an inspection and to provide storage for typical boxed items. … The joists should support your weight, but the space between them almost certainly will not.

How do I reinforce my attic floor?

If the attic joists are not adequate, one way to strengthen the floor for live loads is to sister the old joists. Sistering is the process of adding a new joist next to each existing joist. In the case of 2×6 joists, you can pair them up with additional 2×6 joists by nailing them together, side by side.

How thick should Plywood be for attic storage?

You need 3/4-inch plywood. The thinner plywood is acceptable when the joist spacing is 16 inches. If you plan to finish the floor in the attic and turn the room into a living space, however, you should always use 3/4-inch plywood.

Can you put plastic over insulation in attic?

Once you talked about stapling down sheets of plastic over rolls of insulation. … In any case, a vapor barrier always faces the heated side, so it would never be put on top of batt insulation in an attic.