How Do You Flatten Warped Wood Panels

To flatten a warped piece of wood, you’ll need to change the moisture content on one side of the board. Look at your warped board and identify the inside face of the “C” or cup. The wood fibers on this side of your board are dryer and have shrunk. You can use water to relieve the tension and allow the board to flatten.

How do you fix a bowed panel?

If the warp is not too pronounced, you can steam it out. Lay a damp towel on the cupped or concave side and heat it with an iron. The steam penetrates quickly into the wood fibers, causing the cupped or “short” side to expand. Move the towel and iron up the length of the board until it appears flat.

How do you straighten warped pressure treated wood?

To straighten warped wood, I soak in water. Or if you can’t submerse them put a wet cloth on the inside of the warp curve, and soak until straight. Once straight, switch the water formula for an Elmer’s white glue or the wood glue with water.