Attic Stud Spacing

Use r 30 insulation for the ceiling and r 13 for the walls.

Attic stud spacing.

Staple insulation between the wall studs and ceiling joists image a. In new residential construction the most common stud spacing is 16 inches on center. The trusses should be a little longer than the exact width to allow for overhang and you will need sufficient trusses to mount across the length. If you re insulating framed walls make sure the insulation is the correct thickness for your wall studs.

That means the builder measures from the center of one stud to the center of the next. 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. 2 stud s for wall s not listed in table 9 23 10 1. But they do tend to space rafters in one of several industry standard increments typically either 12 16 or 24 inches apart.

Most are spaced between 18 26 inches apart. Joist dimensions are only part of the equation. Don t mash or compress the insulation into the space. Measure between joists if insulating a floor or attic or studs if insulating unfinished walls to find the correct width for the insulation.

And support ing roof loads shall conform to tables a 30 to a 33 provided a the stud s are clad with not less than 9 5 mm thick ply wood osb or waferboard sheathing on the exterior face and not less than 12 5 mm gypsum board on the interior face. At least 50 percent of the attic space must have 7 foot 2 1 m clearance. Putting the trusses into place. If building a knee wall for storage like karl did with this project make sure to insulate that area as well.

Builders aren t bound by standard rafter spacing measurements. Beyond the size of joists the spacing between them should also be taken into consideration. This flexible insulation material is most often packaged in rolls that come in various thicknesses and standard widths usually 16 inches and 24 inches to fit between joists or studs in a house s framing. Once you ve calculated the number of trusses you will need you should purchase the lumber.

Standard joist spacing for the installation of attic flooring materials is 16 inches on center oc. You also need to ensure that the joist spacing is adequate.