posted 11 years ago
It helps to try to diagnose the cause of bee death in your hives.
A very cold spell can prevent the bees from moving around the hive to find more food, so they can starve with food reserves still presentCondensation is known to cause problems - using a quilt box full of shaving can stop moisture dripping on bees.Warm weather in winter can break hibernation too early and lead to the bees using their food faster.Diseases or pests can weaken the hive going in to winter - eg varroaBad luck - if the queen suffers and accident over the winter the colony cannot replace her as they don't have any eggs to make queen cells.
You'll know your conditions, so it is a case of working out which is most likely. Hive bodies made of thicker wood are more insulating and protect the bees both from extreme cold and condensation issues - see the thread on Holzer Style Log Hives, and info for top bar hives which recommends wood of 1 inch thickness for construction.
Moderator, Treatment Free Beekeepers group on Facebook.
https://www.facebook.com/groups/treatmentfreebeekeepers/