It has been a very hot, humid summer in New England this year. My husband built our ladies a beautiful coop this summer and before I could treat the wood, it has started to mold/mildew. Powdery, grey awfulness everywhere, inside and out (it’s all new lumber). It has windows, and since I have yet to put up screen on the overhangs, air flowing through there, plus the door. Anyone else dealing with this? How can I treat all of what is growing as well as prevent further issues?