>>I use upper ventilation and a homosote board over the inner cover. What material is homosote board made from? >>The board absorbs excess water and the bees use it as a water source throughout the winter. Do you see bees diving into the snow on sunny, cool days in March (or April by you)? Waldemar ****************************************************** * Full guidelines for BEE-L posting are at: * * http://www.honeybeeworld.com/bee-l/guidelines.htm * ******************************************************