lawsonpix wrote:Lexan (polycarbonate) is definitely a better choice than plexiglass, but scratching may be an issue.
I strongly disagree, but the choice of acrylic vs polycarbonate depends on the individual needs of the teardrop owner.
I used 1/4" cell cast acrylic for my large skylights for two reason: UV resistance and clarity. My roof is flat so I didn't need flexibility, although acrylic can be formed. I also wanted something that wouldn't get scratched from tree branches. Polycarbonate will scratch much easier. Also, acrylic will stand up to weather much better. Its UV stability is far superior to poly, which means it won't yellow over time. And while it isnt as impact resistant as poly, it is still a very strong material and will stand up to the elements without issue. I got caught in a hail storm and didn't have a problem.
Since my roof is flat, I didnt need to use any mechanic fasteners. My panels are simply held on with caulk, and arent going anywhere. Solid as a rock.