Investigating a warped and wavy roof.
Warped plywood on roof.
Underlayment not lying flat.
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.
As moisture is absorbed into the wood or leaves it it often causes the boards to warp.
Any problem with the decking can result in a visible wave on the roof.
What kind of plywood for the roof.
The decking is the plywood that covers your entire roof and is the foundation for your shingles.
Reversing the warp can be accomplished by adding moisture to.
The convex or humped side should face up and the side you sprayed.
Plywood isn t the only wood which can become warped.
Before you give up in frustration though try a little moisture therapy.
Boards do so regularly.
Most construction sites will consider the use of either osb or plywood for the roof.
The easiest way to remove this warp making the board straight again is to use water and heat the same things that caused the board to warp in the first place.
Damaged decking can be potentially dangerous.
Spray hot water generously onto the concave area of the warped plywood.
Even new plywood can warp if not stored properly or if left in the sun.
If the underlayment or the vapor barrier underneath your roofing material becomes wrinkled it might result in your roof taking on a buckled appearance.
It could be an indication of water leaking through the shingles or a.
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.
The plywood might also become warped itself if it becomes wet which could happen in the case of a roof leak.
