What's the difference between MDO and MDF? 

I’ve seen you use MDF in projects and jigs many times in WOOD® magazine. Then I heard on a TV remodeling show about something called MDO. What’s that?

By
WOOD Magazine Staff
WOOD Magazine Staff

Launched in 1984, WOOD® magazine is the world's most trusted woodworking resource — a distinction we've earned by guaranteeing our readers' success in their woodworking shops. It is the  mission of our staff to inspire and inform woodworkers at every stage of their journey by providing reliable and accurate project plans, woodworking techniques, and product reviews.

WOOD magazine's Editorial Process
Published on January 17, 2019
102006593.jpg

Q:

I've seen you use MDF in projects and jigs many times in WOOD® magazine. Then I heard on a TV remodeling show about something called MDO. What's that?
—Greg Montano, North Wilkesboro, N.C.

A:

Medium-density fiberboard (MDF) is manufactured from fine wood fibers and resin bonded together, Greg, and compressed into sheets to give it a smooth, flat surface. Medium-density overlay board (MDO) has a similar, smooth surface about 1⁄16 " thick on each face, bonded to a plywood core. Because MDO's faces contain more resin than MDF, MDO works well for exterior use, such as painted signs. Stronger than MDF, MDO weighs less and doesn't create a cloud of choking dust when you saw it. It also costs about a third more.

You'll find MDO at some home centers, but will have better luck at a lumberyard or hardwood retailer that sells sheet goods.

Was this page helpful?