Insulate Attic Joists

They have floor joists or the bottom chords of roof trusses with drywall below.

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. To install fiberglass insulation start by measuring out each section. 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.

Use a piece of 1 x 6 or 1 x 8 lumber to create a dam on either side of the fixture. 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. Fill every joist space completely and evenly with the insulation leaving attic vents uncovered. In practical terms you can choose between mineral wool or insulation boards.

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. 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. If you do not use the attic much it is pointless heating this area. The insulation should not bulge past the joist faces.

More insulation installation tricks and tips work from the perimeter of the attic toward the door or hatch so that you don t trample all over the insulation you just. Cut a piece to the proper length and press it in place. Staple a 4 to 8 mill. 1a attic access door.

If the air distribution is in the attic space then consider insulating the rafters to move the distribution into the conditioned space. Insulating the attic floor. Thread the twine between the joists attaching it to the sides of the joists with drywall screws or roofing nails. So insulating the floor of the attic is not only the best solution but it is also the simplest and cheapest.

Start by installing temporary lighting such as clip lights and laying a few sturdy boards along the joists to create a walkway. When you are in the attic you re usually stepping carefully on top of the floor joists looking down at the back side of the drywall ceiling. If your insulation is just level with or below your floor joists i e you can easily see your joists you should add more.