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How do you remove old plywood from a roof?

How do you remove old plywood from a roof?

How to Remove Roof Sheathing

  1. Drive stakes into the ground at the corners of the house.
  2. Climb onto the roof and walk up to the roof peak.
  3. Wedge the end of the pry bar into the seam between two sheets of sheathing.
  4. Pry the edge of the sheathing from the roof rafters while standing on an adjacent sheet.

Does plywood need expansion gap?

If you install plywood sheets tightly against one another, the edges tend to pucker upwards when they expand. Virtually every one recommends that you, your carpenter or builder create a 1/8 inch gap around all edges when installing plywood. This gap will minimize or totally eliminate any puckering caused by swelling.

Where must the edges of floor sheathing panels fall during installation?

Panels should be installed with the 8′ length perpendicular to support members. When laying out sheathing, make certain that each panel covers at least two spans and panel edges fall at the center of a support. It may be necessary to trim some panels. Make sure that the “This side down” stamp is on the underside.

Can you put new plywood over old?

1 Answer. If the old plywood was clean and not infested with dry rot or mold it should be OK to cover it with the new plywood. One thing to consider is that the new plywood probably wants to be the same thickness as what would be used if it was used by itself on the rafters (i.e. if the old plywood had been removed).

Is it better to nail or screw subfloor?

Using code-approved screws rather than nails is the best option for avoiding movement. If using nails for subfloor installation, stick with ring-shank nails; smooth nails may withdraw easier, leading to squeaks.

Should the plywood grade stamp be installed up or down?

Answer. OSB roof panels should always be installed with the grade stamp facing into the attic and the screened surface (with the nail guide lines) facing up.

How many screws are in a 4×8 sheet of subfloor?

Figuring 6″ edge and 8″ inside I had calculated it to be 82 screws for one 4×8 sheet.

What side of OSB should face up on floor?

For interior uses the OSB should be smooth side out. The reason it is textured on one side is for roofing purposes and states to install with that side up.

What’s the best way to lay down plywood?

If you need to cut the plywood to fit the space, place the edges you cut towards the edge of the wall as the cuts you make will not be as straight and clean as the factory edges. Once you have made your cuts lay down the plywood sheets the way you want them as a test.

How do you attach plywood to a subfloor?

Once you have made your cuts lay down the plywood sheets the way you want them as a test. If everything looks right you are ready to attach the plywood to the subfloor. Use the construction adhesive on the liberally on the “bad” side of the plywood (the side without the nice woodgrain).

What’s the best way to clean plywood floor?

Once it’s all swept up and vacuumed, mop the subfloor to clean it and let it dry. Apply the Kilz sealant to the subfloor. The Kilz will help protect the subfloor and help seal in any odors that have made it on to the subfloor.

What’s the best way to seal a piece of plywood?

Once the sanding process is complete, you can apply the first layer of paint, use a primer, or apply spray-on latex. Spray-on latex is essentially the same as paint as it provides a layer that sticks to the surface which seals up the porous plywood.

Do you need to block a wall with plywood?

For shear-wall construction, code requires blocking between the studs along every plywood joint. Although blocking is required by code for walls, floor or roof plywood systems do not require blocking. I wonder if a hurricane or an earthquake can really tell the difference.

What to do about wet plywood during construction?

At this point, due to the fact that there have been standing puddles of water on the subfloor, there are pockets of de-lamination all over the place. We could, once the roof is complete and the building is closed in, get a de-humidifier in there and really cook the place dry before installing the flooring, but what about all those plywood bubbles?

When to add plywood to a new roof?

You also should consider the design parameters of the roof to ensure that the extra weight of the added plywood is well within the static load capability of the roof support structure.

What’s the best way to run plywood panels?

However, when used in wall construction as a shear diaphragm for wind or seismic loads, the panels can be run either vertically (parallel to the studs) or horizontally (perpendicular to the studs).