Warped Roof Plywood

Internachi describes some of the effects multiple layers of roofing can have on a home.

Warped roof plywood. 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. 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.

Spray hot water generously onto the concave area of the warped plywood. These include weaknesses in the overall structure. Plywood in a roof deck creates a warped effect when holes in the exterior allow water inside your home. Poor installation may also create movement in the plywood.

Like the underside of a shriveling leaf the plywood s concave side has lost moisture and shrunk. The convex or humped side should face up and the side you sprayed. Cdx plywood is a construction grade type of plywood that is designed for. 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 this concave side and drying the convex humped side. I use a sponge or sprayer to wet the concave side of the plywood hot water works best. Any problem with the decking can result in a visible wave on the roof. 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.

Damaged decking can be potentially dangerous.