I had to rebuild the top and one side of my coldframe as I left it open one day and the wind wrecked it. The new lid has turned out great and is much lighter than the previous lid. On the first lid I used 1/4 inch plexiglass for the clear top which made it really heavy to lift. So I went to Home Depot and got some lightweight clear corrugated polycarbonate panels that were more expensive than plain clear corrugated plastic panels. I hope they won’t get cloudy or streaked and they say they are almost unbreakable. We’ll see in our wind! I won’t leave it wide open again, that’s for sure!