Often asked: How To Sheet A Roof With Plywood?

Can you plywood roof sheathing?

Usually, roof sheathing is made of wood. It can come in the form of plywood or oriented strand board (OSB). OSB is less expensive, but lighter and far more fragile, which is why many roofers rely on plywood.

What thickness plywood should be used for roofing?

Most roofs will be sheathed in plywood at least 3/8 inch thick. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. Loads will vary with the pitch of the roof; the flatter the roof, the greater the load on any one section. Steeper roofs will have lighter loads per square foot.

Should I use OSB or plywood for roof?

OSB takes longer than plywood to get saturated, but also takes much longer to dry out. When used as roof sheathing, this tendency to hold moisture means it will degrade faster than plywood when exposed to chronic leaks.

How much is a sheet of roofing plywood?

Your price could vary depending on how much the roofing company charges for labor, but generally you can expect to spend between $70 to $100 for each sheet of plywood.

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Can you put shingles directly on plywood?

A: It is never a good idea to install a roof over wet plywood or any type of roof sheathing. Trapped water will boil when the sun heats the roof and the shingles will then have small pits where the steam finally escapes.

Is CDX plywood good for roofing?

Only use CDX plywood for the interior of a house, where water damage is far less likely. Do not use CDX for roofing, sheds, or other places that are exposed to moisture consistently. The sole exception to this is pressure treated CDX, which can survive for decades without even a protective coating.

Does roof sheathing go over fascia?

When sheathing a roof, the first step is to snap a line so that the first row goes on straight. But if you snap it at 40 inches, then the sheathing will not project over the subfascia or true fascia.

How do you lift heavy plywood?

Here’s how to do it without breaking a sweat: Take an 18- to 20-foot-long piece of rope and tie the ends together. Lean the plywood sheet on its long edge and slip the rope around the two bottom corners. Then reach over the sheet, grab the rope in the middle and lift, steadying the sheet with your free hand.

Can I use 1/2 inch plywood for shed roof?

If the shed is for light tools then 1/2 inch pressure treated plywood is acceptable. If the shed is for heavier storage, then pressure treated 3/4 inch exterior-grade CDX plywood is the best.

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Can you put plywood over plywood on roof?

The new plywood will have to be nailed to the rafters or roof trusses. But, with the old plywood left in place, it will be considerably more difficult to locate the rafters to ensure proper nail placement.

How many shingles cover a sheet of plywood?

Each plywood sheet is 4 x 8 feet or 32 square feet, which coincidentally is almost exactly equivalent to the coverage of one bundle of traditional three-tab shingles. If it’s a re-roof project and you have access to the original paperwork from the last shingle installation, that may be useful in showing the roof area.

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