Hi all clipped from Aaron's post... > 'do follower boards prevent inner cover condensation > as claimed by the BC article?': They will not prevent it, but they will alter the threshold at which condensation will form, by reducing resistance to the circulating air. I prevent condensation, at the top of the hive, entirely by using an insulated slab of expanded polystyrene within the structure of the roof, zero top ventilation and no 'inner cover'. This allows the warm moist air to stay warm enough to not drop it's water load at the top of the hive, the water stays vapourised until it reaches the colder sides of the hive. http://website.lineone.net/~dave.cushman/rroof.html Shows a version of the solid roof, that is dimensioned for UK hives, but you can adjust to suit 'whatever' hive type. Best Regards & 73s, Dave Cushman... G8MZY Beekeeping & Bee Breeding Website Email: [log in to unmask] or [log in to unmask] http://website.lineone.net/~dave.cushman & http://www.dave-cushman.net :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -- Visit www.honeybeeworld.com/BEE-L for rules, FAQ and other info --- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::