teignbee,
Reply to posts #9 and 10.
I mean if 'they' (the entrance blocks) are turned upside down for the winter, trash can still fall through the OMF floor? 'They' can be re-inverted in the spring? Or even just removed, so the bees can clear out any remaining trash. It will be spring-clean time, for all the colonies, anyway. I always check with a pice of stiff wire (coat hanger) to make sure the entrance is not blocked whenever I check my National hives in the winter months. Lots of dead bees will ring alarm bells!!!
Ideally there will be very few dead bees in the hive. You can worry about your bees as much as you want, but mostly, they can look after themselves; they were doing that very successfully for millions of years before man came along.....
And for the beehouse lot, there is another of those positives for the wooden Dartington design; the entrance can remain open full-width all winter, the bees are wintered well back from the actual entrance slot, behind a full width dummy insulating board (well my Dartingtons are!) so any draught through the entrance slot (and there won't be a lot) won't affect them anyway. But maybe the plastic version is a bit of a design compromise in that area (I don't know)?
Regards, RAB