Does roof sheathing need to 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.

Why do you stagger plywood on roof?

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

Does roof sheathing need to be spaced?

Fasten panels with a minimum of 8d Common (0.131-inch by 2-1/2-inch) nails spaced a maximum of 6 inches on center at supported panel ends and edges. At intermediate supports, fasten panels 12 inches on center. In high-wind areas, more fasteners may be required.

Do you overhang sheathing on roof?

Measure up the rafter 45-3/4 inch from the cut end of the truss tail and snap a line along the trusses. This indicates the upper edge of the first row of roof sheathing—leaving enough overhang that the subfascia and fascia will tuck neatly underneath when the time comes.

Should roof sheathing overlap fascia?

The best installation method is to leave a gap between the drip edge and the fascia board, about the width of a finger. The shingles should also overhang the drip edge 3⁄8 to 1/2 an inch.

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Does fascia go on before roof?

Fascia and soffit are installed after the roof installation is finished. It is ideal that soffit and fascia materials be installed before you place tiles or any other type of roofing material on the roof. There are different types of finished and variations that can be used for the soffit.

Are H clips required for roof 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.

Is it better to nail or screw roof sheathing?

Nails are often preferred for structural joining, including framing walls, because they are more flexible under pressure, whereas screws can snap. Nails are also called upon when securing plywood sheathing for exterior walls, installing hardwood floors, and attaching siding and roofing.

What is the nailing pattern for sheathing?

Through the decades, the code has been very consistent regarding nail spacing. Maximum allowed nail spacing for conventionally laid unblocked roof plywood has remained remarkably constant: 6” on center (o.c.) at the supported short edges of panels, and 12” on center “in the field” at intermediate supporting rafters.

Does OSB need expansion joints?

Yes, in order to avoid dilation stress on the board edges. Expansion gaps are narrow distances that must be provided at the panel joints when fixing the straight-edge OSB boards on supports.

What is spaced sheathing on a roof?

Spaced Sheathing, also called Skipped Decking, refers to the construction details of the substrate which the cedar gets nailed to and thus secured to your home.

Can you use screws on roof sheathing?

Screws can be used for even greater withdrawal strength, but should be sized by the building designer. Staples are not recommended for roof sheathing attachment in high-wind areas. It is extremely important to have proper fastener spacing on all panels.

How do you stack plywood on a roof?

Take two 2x4s long enough to extend above the roof line by about 2′. Attach another section of 2×4 across them to hold them together at a height that will allow you to stack the plywood on it so that the top of the plywood sticks up above the top of the jack stand at the roof line.

Do roofing nails go through the sheathing?

Roofers commonly hammer nails through the sheathing since roof nails are impressively long and materials used for sheathings like plywood or OSB (Oriented Strand Board) aren't that thick, and so it's normal that roofing nails visibly stick out.

What is the best thickness for roof sheathing?

Standard roof sheathing thickness is ½” to ⅝” thick. If you are using OSB for your roof deck, then ⅝” is the recommended thickness. For plywood, which is slightly stronger than strand board, ½” thick is appropriate. Another factor is how far apart your trusses or rafters are spaced.

Is OSB OK for roof sheathing?

Both OSB and plywood panels can cut and installed on a roof using conventional roofing equipment. They have similar structural characteristics, and can be used interchangeably.

What size screws should I use for roof sheathing?

Now, however, experts almost universally recommend using 8D common nails. “Your roof will be more resistant to heavy winds if you use the right nails to secure the sheathing,” according to James Bedford of Fort Collins Roofing in Fort Collins, Colo.

Do screws hold better in OSB or plywood?

Plywood and OSB: Screw withdrawal or holding ability. Group 1 plywood, made from the strongest species of wood such as Southern Yellow Pine, holds screws better than OSB.

How many roof sheathing clips do I need?

pair of trusses, rafters, or joists. However, two (2) equally spaced H-clips are required between supports when spaced 48 inches on center. misfit of abutting sheets may be tolerated if gaps do not exceed maximum opening of 1/4 inch (6 mm).

Can I use 2x4 for fascia board?

Install 22-1/2" long 2x4s between the trusses to support the fascia boards where they butt. See detail below.

Do roof tiles rest on fascia board?

The tiles shouldn't be just rested on the fascia board as that is not what it is for, it's bad practice, and makes replacement fascia work harder.

Can I attach a ledger board to a fascia?

If you own a two-story home, you can tie the ledger into a band joist. Find the band joist by measuring down from the 2nd story window. When you attach the ledger boards to the fascia, they should be held securely with bolts through the wall, or you can use lag screws.