When i was 17 years old (54 now) I saw this idea in one of my buddys dad's shop and always wanted to have one. He used it to save on heat and and to keep that side as a clean room for building engines. I never had a shop that it made sense to have one until now. I bumped out the back of my two car attached so now it is 20x50 and it works great as a divider. I got it from a church that was taking it down. It weighs over 300lbs. the first picture is from the new addition looking into the old garage. The second is with the divider closed. Heavy duty vinyl so it will be easy to clean.
Ha ha, I bet that will really keep the heat in. Good find!