Attic Stud Spacing

Don t mash or compress the insulation into the space.

Attic stud spacing.

Use r 30 insulation for the ceiling and r 13 for the walls. Joist dimensions are only part of the equation. At least 50 step 2 make sure the attic has a full size staircase. Building code also requires that the.

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. That means the builder measures from the center of one stud to the center of the next. In new residential construction the most common stud spacing is 16 inches on center. Measure between joists if insulating a floor or attic or studs if insulating unfinished walls to find the correct width for the insulation.

You also need to ensure that the joist spacing is adequate. If building a knee wall for storage like karl did with this project make sure to insulate that area as well. For a finished attic to be to code it must satisfy the same living requirements of other rooms sometimes called the rule of sevens any living space in a home needs to have at least 7 feet 2 1 m of clearance from the floor to the ceiling and there needs to be at least 70 square feet of space available at least 7 feet 2 1 m in each direction. Step 1 check the ceiling height.

Staple insulation between the wall studs and ceiling joists image a. If you re insulating framed walls make sure the insulation is the correct thickness for your wall studs. Attic joists that are made from 2x8s may be acceptable for building your attic floor but because every room is variable there are no absolutes.