Floor Joist Insulation Guide

Stops heat loss into your attic.

Floor joist insulation guide.

When a traditional form of insulation is inserted between floor joists the floor is pulled up and the material cut to size and stuffed within the space. A recent job forced me to think of a new affordable way to install floor insulation from above. Underfloor insulation if you have you an access hatch that allows you to get into the crawlspace void below the floorboards this is a relatively easy process if not you will have to take up. Gaps between the insulation and the floor can lead to inefficiency and heat loss.

Attics walls and between crawlspace joists. Best for long unobstructed spaces like over attic joists. Glass fibers in puffy strips with or without a paper or aluminum face. Once the ceiling is buttoned up insulate the rim joist the floor framing around the perimeter of the house directly above the foundation wall.

The numbered areas shown in the illustration are as follows. Whats people lookup in this blog. Hold the batts in place by stapling their paper faced vapor retarders to the lower edges of the joists. The fiberglass will also need to be secured in place using wire mesh twine wood laths or other securing methods which can be an intensive project that adds to the overall cost.

Semi rigid insulation can often be friction fitted or held up by battens attached to the bottom of the joist. If the air distribution is in the attic space then consider insulating the rafters to move the distribution into the conditioned space. Stops heat loss into your attic. Must be measured and cut to fit walls or flat surfaces.

Wall insulation keeps out cold. Floor joist insulation r value. Usually fiberglass insulation is installed under the subfloor between the floor joists. You can opt for more energy efficient options such as ridge board spray foam or cellulose.

In unfinished attic spaces insulate between and over the floor joists to seal off living spaces below. As spray foam insulation is a foam it is simply sprayed between the joists with the floor raised or injected into the space through holes or access points in the floor. And this video shares the insight that i attribute to the lo. This step is usually for areas with a moderate or dry climate.

If you have access to the crawlspace beneath the floor the job should be fairly simple. The insulation should press right up against the floor between joists.