SiWoLKe, Wall-E is a lucky fella, if I interpret your apivar correctly.
BlackForest, in winter I use fondant placed on winter boards. I can remove the hive lid, add fondant if needed and not expose the frames or lose much hive heat. Burlap is added for condensation next to the fondant. The fondant is placed downhill on the winter board as my hives are sloped. So if a freak warm day appears and fondant melts, the hives are OK. Melted fondant will not run into the frames with my sloped hives.
Hive Slope: my hives are set level then a 2X4 is added to bottom back of hive creating the necessary slope. With this slope, rain is seldom a problem on my screened bottom boards. Slope Works well for winter. In the past, a level hive on mine was killed with syrup draining on the winter cluster. My mistake.
Blessings
Do you folks Forest, SiWoLKe, have issues with Small Hive Beetle? Yes, subject change. I hope this does not cause problem.