previous
  • Custom Flooring Inspiration
    Custom Flooring Inspiration
  • Video: Install a Fence
    Video: Install a Fence
  • Read FHB on Your iPad
    Read FHB on Your iPad
  • Tips & Techniques for Painting
    Tips & Techniques for Painting
  • Magazine Departments
    Magazine Departments
  • 7 Smart Kitchen Solutions
    7 Smart Kitchen Solutions
  • 12 Remodeling Secrets
    12 Remodeling Secrets
  • Energy-Smart Details
    Energy-Smart Details
  • All about Roofing
    All about Roofing
  • 7 Trim Carpentry Secrets
    7 Trim Carpentry Secrets
  • Master Carpenter Videos
    Master Carpenter Videos
  • Pro Tool Rental
    Pro Tool Rental
  • Basement Remodeling Tips
    Basement Remodeling Tips
  • Clever daily tip in your inbox
    Clever daily tip in your inbox
  • Design Inspiration
    Design Inspiration
  • 7 Small Bathroom Layouts
    7 Small Bathroom Layouts
  • Projects Done Right
    Projects Done Right
  • 9 Concrete Countertops Ideas
    9 Concrete Countertops Ideas
  • Video Series: Tile a Bathroom
    Video Series: Tile a Bathroom
  • Remodeling Articles and Videos
    Remodeling Articles and Videos
next

Flattening warped plywood

Even new plywood can warp if not stored properly or if left in the sun. Before you give up in frustration, though, try a little moisture therapy.

Like the underside of a shriveling leaf, the plywood’s concave side has lost moisture and shrunk. 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). Then I lay the sheet, moist side down, on a shop floor or a driveway. Now the sun, or the warm interior air, helps to dry out the convex, humped side of the plywood. At the same time, moisture is being absorbed into the concave side. This process works faster than you can imagine, so keep an eye on the material. If it warps the other way, just reverse the process.