I don't know about Wilmington exactly, but I have gotten it a Home Depot, they also have 3/16". It's tempered, which IMO is better, smooth on one side rough on the other.
Dave
Home Depot and Lowes sells is. All different thicknesses. 2'x2' and 2'x4' sheets that I remember. Maybe I saw some 4'x8' sheets.. but I could be mistaken..
Home Depot carries the most sizes in my area. They have 1/4 in 2x2, 2x4, 2x8. They sometimes carry tempered 1/4. Also, I have seen 3/16 tempered in 2x4 sheets, as well as 1/8 (sometimes tempered, sometimes not) in varying sizes.
Depending on your usage hold out for the tempered stuff. I covered my 4'x'8' outfeed table 3-4 years ago with tempered board. It was great. Replaced it a few weeks ago because someone had abused the surface. Both HD and Lowes were out of tempered at the time, so I got what they had. What I purchased is not acceptable. No matter how many screws I put in it, it still buckles.
Yeh, I ommitted the word "tempered" in my post. That's what I'm looking for. I have bought it in the past at Lowes but I have checked three Lowes in the area and they are not stocking it. I will check HD and see if they carry it. I like it to make patterns with it.