Question: Can You Cover Attic Insulation With Plywood?

Can you put too much insulation in your attic?

But there may be a theoretical point of “too much.” If a home is over-insulated and is too tightly sealed, moisture can get trapped inside.

Without proper ventilation, a home can build up too much moisture, especially in the attic (warm air rises), which can cause mold problems and, overall, lower indoor air quality..

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.

What kind of plywood do you use for an 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 does it cost to insulate a 1500 sq ft attic?

Attic Insulation CostsItemUnit CostCostInsulation: install Kraft faced R-19, 23″ wide x 6.25″ thick x 1,500 sq.ft.; prepare and clean up; including waste and miscellaneous material.$0.64$1,053+ Labor Cost$32$448Total Cost$1.00$1,501

Can I cover attic insulation with plastic?

4 Answers. Plastic isn’t recommended in this situation because it would create a second vapor barrier that can trap moisture and result in condensation and mold. Craft paper would have the same problem, this is what is most likely on the other side of the insulation for the vapor barrier you want.

What type of insulation is best for attic?

Loose-fill fiberglass attic insulation still experiences convection, but not nearly as much as old fiberglass used to. If you check with the North American Insulation Manufacturers Association, they’ll assure you that fiberglass or mineral wool is definitely your best choice for attic insulation.

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.

Can I put plywood over attic insulation?

An attic can be floored with 1/2″ CDX plywood, if it is being used only for storage. However, the same can’t be said if you are planning on using the space as a living space. In that case, you will need to use 3/4″ thick plywood. … The building code allows for the use of OSB in place of plywood for subflooring.

Is blown in attic insulation dangerous?

When fiberglass insulation is moved or disturbed, it releases tiny particles into the air. If they get on bare skin they can lodge into pores and cause itching, rashes, or irritations. If they are inhaled, they can result in coughing, nosebleeds, and/or respiratory problems.

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.

How do you cover insulation in the attic?

Suggestions for covering exposed insulation include the following:Seal the insulation by stapling a polymembrane sheet over it.Install paneling or sheetrock over insulation located in the wall.Install plywood flooring over insulation located in the floor.More items…

Can you put insulation on top of attic floor?

A. Without removing the flooring, you have the option of blowing loose-fill insulation (fiberglass or cellulose fiber) over the top of the floor. … 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.

Should I insulate my attic floor or ceiling?

1. In unfinished attic spaces, insulate between and over the floor joists to seal off living spaces below. If the air distribution is in the attic space, then consider insulating the rafters to move the distribution into the conditioned space.

Is rolled or blown insulation better?

Batts, or rolls, are large blankets of insulation that are made from either fiberglass or cotton. … Blown insulation is accomplished by blowing out chunks of either fiberglass or cellulose from the hose of a blowing machine. The main benefit of blown insulation is that it is a much more consistent type of insulation.