Attic Floor Insulation Options

It s possible to create a solid floor without investing a lot of money.

Attic floor insulation options.

For diy attic insulation you ve got two choices. Insulation derives its resistance to thermal transfer its r value through the presence of dead air space so compressing the insulation will actually reduce its r value. Material costs and going with diy the open cell costs about 600 to cover 1 000 sq. Both can be added to uninsulated attics or layered over existing material.

It s generally 3 to 4 times what you ll pay for blown cellulose or fiberglass. 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. Messy unsightly and can be very expensive cost. Once you ve decided which type is best for you examine the material options and prices to home in on the right product.

Even easier you can also use a prefabricated attic floor kit designed specifically to raise the attic floor above the insulation. There are other materials and systems that you can use to insulate your attic. You can for instance use recycled materials. 15 totally unexpected diy flooring alternatives.

Attic space offers many options for building storage or living space especially if you already have a well built basic flooring in place. Insulation decreases the amount of heat entering from outside when it s hot and traps warmth inside when it s cold. 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. Modifying an attic floor s joist system is a job for the pros.

The ceiling load may include items like drywall ducts recessed lights bathroom fans and attic insulation. The big disadvantage with spray foam is cost. Loose fill or batt the common term for blanket insulation. Most houses attics are built without flooring and are not designed to carry the heavy load of finished space.

Insulation is rated by its r value. Ft while closed cell comes in at 1 200. I d blow insulation on the attic floor after air sealing of course. For interior insulation this provides perhaps the greatest r value and with proper installation it covers gaps better than most options cons.

R values vary based on the type thickness and density of the insulation material. However in some cases the joists are intentionally built strong enough for the homeowner to later build out the attic. Attic floors are often heavily insulated and if the existing insulation extends well above the floor joists laying down floor sheathing over the insulation will compress it.