Insulate Attic Joists

Always cover the tops of the ceiling joists to make sure the insulation is deep enough to reach your target r value and.

Insulate attic joists.

Level uneven spots with a rake. If your insulation is just level with or below your floor joists i e you can easily see your joists you should add more. Thread the twine between the joists attaching it to the sides of the joists with drywall screws or roofing nails. In practical terms you can choose between mineral wool or insulation boards.

Staple a 4 to 8 mill. Start by installing temporary lighting such as clip lights and laying a few sturdy boards along the joists to create a walkway. Use a piece of 1 x 6 or 1 x 8 lumber to create a dam on either side of the fixture. Keep the baffle about 3 away from the fixture figure 3.

Attic insulation is installed in the floor of the attic so you ll need to do a few things to make the process straightforward. In unfinished attic spaces insulate between and over the floor joists to seal off living spaces below. If you do not use the attic much it is pointless heating this area. They have floor joists or the bottom chords of roof trusses with drywall below.

With a helper to load the blower with insulation as needed start at the perimeter of the attic and work toward the attic access door. So insulating the floor of the attic is not only the best solution but it is also the simplest and cheapest. Standard joist spacing for the installation of attic flooring materials is 16 inches on center oc meaning the distance from the center of one joist to the center of the next joist is 16 inches. If the air distribution is in the attic space then consider insulating the rafters to move the distribution into the conditioned space.

To install fiberglass insulation start by measuring out each section. The insulation should not bulge past the joist faces. Cut a piece to the proper length and press it in place. Fill every joist space completely and evenly with the insulation leaving attic vents uncovered.

1a attic access door. No matter what kind of insulation you currently have in your attic one quick way to determine if you need more is to look across the span of your attic. Although it s common to talk about installing insulation on the attic floor most attics don t really have a floor.