Here are some pics of how I change the 16x24 ft enclosure from warm weather to cold weather. Until the leaves fall (usually by mid Nov) not much sun light gets to it.But after that I can put the mountain torts out on sunny days even if it's cold.If it gets to warm inside I can roll the top back to air it out as shown in the last pic. Right now the larger torts are still out going into the heated house at night,probably wont see them out to much tomorrow it's supposed to rain and high temp about 60.