Yes the hinged bottom board does cover a screened bottom. She did a really good job on it so I have to learn to keep a TBH and that includes over wintering so I have a lot to learn but that's ok one thing I like about beekeeping it's always some thing new. I think I am going with putting some top bars in my langs. and then when there's some brood put them in the TBH with the queen bet it works out just fine I just have to wait till I see drones.Glock, good looking tbh, however I'm surprised that you would go this route, from reading your posts over the last year. Just had a different impression of your approach. Good luck with the tbh. I have enjoyed them, and hope you do too. BTW, does the hinged bottom board cover a screened bottom? There's been much discussion here about them.