3/4" Maple plywood for $30

Would this be birch one side maple the other?

I went to Streetsboro (Ohio) HD and got two sheets Thursday.

Be very careful, the surfaces are paper thin.

Why would you use Maple plywood if you are covering it with Formica?

You are correct. Both outside layers are paper thin. Further, I believe it is a mixture of Birch with Maple. Nicely sanded and look great with slight imperfections on one side.

I bought a few sheets and now having trouble keeping the layers (Formica+3/4"+3/4"+Formica) flat.

I'm making a TS and Router extension table for my Crapsman.

Well, that's why you're using plywood, but it still doesn't answer why you're using the more expensive Maple-covered plywood. I was just curious in case I missed something. BTW, MDF might solve your flatness problem.

Because the surface is smoother?

Really, the wood isn't that bad. I think the problem may be he wants it

Question: Could laminate cause a sheet of plywood to twist?

MDF will chips or worn where the router plate's adjustment screws sit.

I have used two 4'X8' plywoods. The first two set (3/4"X27"X41") bow in the center and cut another two set and STILL bows! So, I ended up using the first two (bow) set. Sanded it down (That when I discovered, the outer layers are paper thin). I still did not get 100% flatness, but I guess it will do for now until I cut the hole to fit the router's plate in a few more days (WIP).

In the end I spend more and have more headaches!

My sheet appears to have 5 layers. The outer two are about 1/8" thick each, with the middle three a bit thicker.