Last Updated Sep 29, 2009 11:41 AM EDT
The same material that they make most commercial whiteboards out of is available at most big-box lumber stores like Home Depot for less than $15. "Showerboard" is basically cheap plywood with a waterproof white plastic coating on one side. It's the same stuff that they make cheap showers out of--four walls of showerboard plus a cheap plastic base makes a decent stall. It also makes a great whiteboard.Metcalf spent about $11 on a 4x8 sheet of the stuff (a.k.a. "tileboard") and another $14 for a matching sheet of plywood to use as backing. A tube of Liquid Nails joined the two. Total cost: About $28. Talk about a deal!
Update: Another option is to use a can of Markee Dry-Erase Paint to turn any wall into a whiteboard. It's not quite as cheap as this, but it's definitely a much prettier solution. [via Lifehacker]