Originally Posted by Elmix
Wow, I was just thinking about using lexan. How thick is your sheet? Also what did you use to secure it to the roof?
1/8" is all you need. Make sure it is Lexan and not plexiglas. I ordered 2-26" x 26" x 1/8" tinted gray Lexan on eBay from a seller "popdisplays" . I paid a premium for these knowing I would have too much "scrap" left if I bought a 4' x 8' piece. I used "cold" butyl tape and then stainless steel panhead screws, predrilled about every 2". Once I installed the screws using the impact I trimmed the excess butyl tape showing and then ran a bead of sealant around that. They don't leak. Trimming inside is going to be more work, but doable. 2 inside trim rings instead of one, one being fabricated.