Does sheathing go to top plate?

Determine the top location for your sheathing. Often this is simply the center of the double top plate for vertical installation. Set your first sheet (at any sensible location) at that top position and aligned with the center of a stud layout. Set all remaining sheets at the top and gapped 1/8" at the sides.

Does sheathing go over sill plate?

Should sheathing overlap foundation? The advice when installing wall sheathing is to overlap and install flashing, providing a means to direct moisture away from the foundation. Pros often seal the sill when the wall sheathing overlaps the sill plate.

Does sheathing go over the rim joist?

The wall sheathing should extend below the rim joist, which is inset on this house to allow for a continuous band of insulation. The wall sheathing below dictates the overhang.

Do you sheath walls or roof first?

We strongly recommend you frame roof prior to placing wall girts.

Should sheathing be staggered?

Staggering panels by at least two supports is recommended. During the installation of OSB, the rough surface side should be facing up. This rough side is a screened or skid-resistant coated side. The panels should be spaced 1/8-inch apart at the ends and edges.

House Addition | Top Plate and Sheathing | Day 17

Do you need H clips for wall sheathing?

H-clips are referred to in the APA Guide as “edge support." For the most common roof sheathing in our area, which is 1/2” nominal (7/16” actual) sheathing over trusses or rafters at 24” on center, there is no requirement for H-clips.

Does sheathing have to end on a stud?

Securing the sheathing to the frame

Important, DO NOT fasten the four corners first. To secure the panel to the stud, start at the top left corner of the panel and fasten the panel to the vertical side stud from top to bottom.

Should sheathing be vertical or horizontal?

On roofs and floors, sheathing is installed perpendicular to supports because this is the orientation that results in the strongest roof or floor. Wind loads perpendicular to a wall are similar to floor and roof loads, and installing sheathing horizontally makes walls better at resisting wind pressure.

How thick should sheathing be?

The U.S. Department of Energy has determined that 7/16-inch sheathing is the minimum appropriate thickness for structural wall sheathing with an exception for gable end walls, where the minimum thickness is 3/8 inch.

Should sheathing overlap at corners?

Sheathing usually starts at the end of a wall, or it overlaps one stud width (3½" or 5½") to cap an adjacent wall, but rarely will carpenters lap that extra half inch. There are a couple reasons for this: It's better to be slightly short than too long with sheathing.

How far does sheathing overlap foundation?

protect lower part of wall sheathing with bituthane membrane. overlap sill-to-foundation joint with a minimum 2-inch overlap.

How far below sill plate should siding be?

Even though the sill plate is pressure treated, it is still not 100% rotproof. Therefore, it is wise to do everything you can to stop water from seeping into the foundation-sill plate joint. Therefore, the siding should extend at least 2 inches past the bottom of the sill plate/top of the concrete foundation.

How thick should exterior plywood sheathing be?

The International Residential Code specifies 3/8-inch plywood for sheathing walls with a standard stud spacing of 16 inches, if the siding is nailed to the studs through the sheathing. If the nails penetrate the sheathing, but not the studs, the minimum plywood thickness that the IRC designates is 1/2 inch.

What is the strong direction of plywood?

Wood is strongest in the direction parallel to grain. Because of this, the strength and stiffness properties of wood structural panels are greater in the direction parallel to the strength axis than perpendicular to it (see Figure 1).

Which direction is OSB stronger?

Using OSB Safely

When installing in vertical applications such as wall sheathing, you'll want to orient the smooth or stamped side facing out. The smooth side has a better moisture resistance and will ultimately provide better performance against weather.

What nails do you use for sheathing?

Using 6d (2-inch) galvanized nails, fasten panels (usually horizontally) to wall studs, spacing nails 6 inches apart along the panels' edges and 12 inches apart mid-panel (or as specified by your local building codes). Allow an expansion gap of 1/16 inch between panel ends and 1/8 inch between panel edges.

Are H-clips required on 5/8 sheathing?

5/8” thick panels having a span rating of 40/20 can have an unsupported edge up to 32”. This means that 1/2” and 5/8” thick roofing panels that are supported by roof framing (rafters or trusses) spaced at the typical 16” or 24” o.c. do not require edge support (H-clips).

Should roof sheathing have gaps?

The recommended maximum gap between roof sheathing boards for low-quality, 3-tab shingles is 1/4-inch. If asphalt shingles are installed over sheathing with gaps exceeding 1/4-inch, over time, these gaps may telegraph through and become visible.

Why do you stagger plywood on roof?

We always staggered each row of sheathing by two joist bays because it makes the roof stronger.