My developing understanding informs me that winter condensation is undesireable, and to that end, I've planned to build a warre-quilt for my lang.
Today, however, I read an analysis that suggests that condensation is a necessary winter water source for bees:
It can be read at: http://beenatural.wordpress.com/natu.../condensation/
If I understand the article right, by building a "breathing" roof for my bees, I may be condemning them to a winter of thirst.
I'd like to hear everyone's thoughts on condensation.