Warre hive made of 25mm thick lumber.
During summer sump box rests on 4 safety matches placed on corners of floor. Helps prevent to fallen varroa mites climb up to hive internal walls to cluster of bees.
On top of sump there is foot-bridge for bees, to crawl to oposite side of hive, acts as floor on traditional hive without sump box.
For wintering bees I recomend put on sump box 1 or 2 empty hive boxes (with or without top bars, better probably with, if you lasy to add topbars on spring, topbars also helps keep temperature regime better) below 2 boxes with bee cluster and honey stores. These boxes will shield bees of cold wind blows through entrance.
Added drawing of sump with greenhouse heeter for early spring #Abbe_Warre #bee #feeder #greenhouse_sump #lazy_beekeeping #quilt #roof #small_cell #vertical_top_bar_hive