The addition of a nylon mesh on the landing pad is a good idea. I think the adult bats do fine without it but it helps the babies stay in the box. Over the years a few babies have fallen out of mine then I attached some nylon netting to the landing pad with a stapler. I extended the mesh down and folded up the bottom and stapled along the sides making a pouch, this worked great and also caught the poop. (Remember I mounted mine over a door on a old building) I replaced it yearly and then went to my mesh tray which worked better for me because I could empty it. I had a baby fall into the tray this summer and it managed to crawl back into the house. The old wood that my house is mounted on is course enough for the babies to do this but the scored wood inside the box might not be sufficient for them to hang on when there's so many bats in there.

I'm sure your gonna enjoy your bat house once the bats start occupying it, it looks like a good one!

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