Attic Stud Spacing

In new residential construction the most common stud spacing is 16 inches on center.

Attic stud spacing.

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

Measure between joists if insulating a floor or attic or studs if insulating unfinished walls to find the correct width for the insulation. Staple insulation between the wall studs and ceiling joists image a. 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. Don t mash or compress the insulation into the space.

Use our roll insulation calculator to estimate how much roll or batt insulation you ll need. If you re insulating framed walls make sure the insulation is the correct thickness for your wall studs. Attic joists for live loads. You also need to ensure that the joist spacing is adequate.

Building code also requires that the. Step 1 check the ceiling height. That means the builder measures from the center of one stud to the center of the next.