About 20 yrs ago my DH built me a small green house, 10 X 15 I use it to start seeds and store yard furnature in the winter. it has windows that open on the north and south ends when its hot I open them the breese blows from the south during the summer. if it gets too hot during growing season I will also turn on an old box fan to keep the air moving. During the summer you will only find empty pots, extra potting soil, stored in metal garbage can with lid, and maybe some mircle grow in it. All my tools are made of metal don't use plastic of any kind in there. It will deterate to quickly between heat and cold, plastic just doesn't last. My roof is not glass but a form of recicled plastic used for sky lights in barns