Menard's published the dimensions and weight of their PVC Trim Boards. I calculated a density of .58 g/cm cubed. This is slightly more dense than the cedar I had previously made from. This is good considering I attached decoy weights to the bottom of the cedar boards.

After purchasing the boards, I cut off a corner to make sure it floated. It did. The PVC board seems very durable.

I am in the process of assembling them. I'll report back in the spring.