I assembled my hives with screened bottom boards with the plastic tray. Guess I misunderstood the difference of a solid wood bottom board......wouldn't it be less stress to maintain warmth to add this solid bottom board? Next question is will it just sit below the screened bottom board and fit properly? I really don't want to remove the screened bottom board assembly and replace with the solid bottom board since my hives have been in place for 10 days now. Yet they would be better protected from the wind and still chilly nights.