Warped Plywood On Roof

Any problem with the decking can result in a visible wave on the roof.

Warped plywood on roof.

Even new plywood can warp if not stored properly or if left in the sun. As moisture is absorbed into the wood or leaves it it often causes the boards to warp. Step 2 set the plywood sheet on a flat surface that has adequate exposure to warm air such as a paved driveway on a warm sunny day. Damaged decking can be potentially dangerous.

Spray hot water generously onto the concave area of the warped plywood. If the underlayment or the vapor barrier underneath your roofing material becomes wrinkled it might result in your roof taking on a buckled appearance. Before you give up in frustration though try a little moisture therapy. The plywood is nailed to the roof rafters and unless the builder used a tongue and groove plywood or h clips the long edge can warp in between each rafter.

Investigating a warped and wavy roof. When it comes to choosing what kind of plywood you need for the roof it is important to understand the basic categories that you can choose from. What kind of plywood for the roof. The plywood might also become warped itself if it becomes wet which could happen in the case of a roof leak.

The convex or humped side should face up and the side you sprayed. Boards do so regularly. Reversing the warp can be accomplished by adding moisture to. Cdx plywood is a construction grade type of plywood that is designed for.

Plywood sheathing not butting up nicely all around but warpage here and there is pretty easy to see how the home inspector caught the mold but didn t see the warped sheathing is a head scratcher pretty clear this didn t happen in the last 18 months. The concave area is the interior of the hump formed by the warping. Like the underside of a shriveling leaf the plywood s concave side has lost moisture and shrunk. Plywood isn t the only wood which can become warped.

It could be an indication of water leaking through the shingles or a. Most construction sites will consider the use of either osb or plywood for the roof.