Do you have to stagger roof sheathing?

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.

Why is plywood staggered?

The end joint is where one board or plywood sheet butts up against another. In almost every situation, it's important to stagger these joints to avoid straight lines that extend in a perpendicular direction across the lengths of the boards.

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.

Does OSB sheathing need a gap?

APA recommends a 1/8-inch space between panel edge and end joints. Plywood and oriented strand board (OSB), like all wood products, will expand or shrink slightly with changes in moisture content. If the wood structural panels are tightly butted, there is no room for expansion and buckling can occur.

WATCH THIS BEFORE Sheeting Your Roof With OSB!!! (avoid this costly nailing + spacing mistake)

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.

How far should roof sheathing overhang 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.

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.

Which way do you lay plywood on joists?

Ply should always be laid with the grain running across the joists, not along the joist, to maximise the strength. Laying them length ways down a joist will cause them to crack along the grain which could end up in serious injury and or damage. The smaller the gap between joists the stronger the board will be.

Does plywood subfloor need to be staggered?

More plywood sheets are nailed down, staggering seams for a stronger fit. When you build, you always stagger. It's what makes a pile of boards and materials into a solid structure. Stagger stagger.

How many screws come in a 4x8 sheet of plywood?

How Many Screws in a 4'x8′ Sheet of OSB or Plywood. When securing OSB or plywood subflooring, you should use a screw every 8 inches along the floor joist or truss. So, you'll need 12 screws down the 8-foot length of OSB or plywood.

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.

Can you lay roof sheathing vertically?

Installed vertically, the same panel can only handle gusts up to 110 mph on the same stud spacing. The IRC, meanwhile, allows you to orient the sheathing in either direction for wind loads, but includes an important exception: If you're using 3-ply plywood panels of any thickness on studs spaced greater than 16 in.

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.

Should drip edge be tight against fascia?

A vertical drip edge lip extends down roughly 1 5/8" and as Steve points out, should not be set tight against the fascia board or water may run behind the gutter and down the fascia, inviting leaks and rot.

How far down should sheathing go?

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. It's about 9 inches in this case, and Ben subtracts a quarter inch to allow for inconsistencies.

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.

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.

What size nails should I use for roof sheathing?

Common nails are acceptable nails for OSB roof sheathing. Builders generally use 8d common nails, which are approximately 2 ½ inches long and 131/1000 inch wide in diameter.

How thick should my roof plywood be?

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.

Does plywood need an expansion gap?

Unlike laminate floors which float over an existing floor and have expansion gaps, plywood is usually screwed or nailed into position and expansion gaps are not necessary. You should fit the plywood sheets tight together , but always leave a 10mm expansion gap at the perimeter.

Can you use tongue and groove OSB for roof sheathing?

OSB Combo Roof/Wall Tongue and Groove Sheathing is a 1-of-a-kind structural roof and wall system with a built-in energy-efficient barrier that keeps moisture out and reduces air leakage, while still allowing panels to properly dry. Plus, it installs in 2 easy steps: 1. Install the panels, 2. Tape the seams.

Does OSB board expand and contract?

In common with other wood and wood-based products, OSB may expand or contract slightly when exposed to changes of moisture in the atmosphere.