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MeshColour t1_is2cbyt wrote

Especially in smaller pieces Plexi is over priced

Frames for poster are often a cheap source for a good size, the cheap ones have very thin Plexi, the mid range ones might be thick enough to survive being outside for a few years (UV is hard on plastic)

And polycarbonate (lexan) is even more overpriced, again due to being more specialized uses

If you were buying a full 8x4ft sheet of them, Plexi is likely cheapest, then glass, then lexan?? But buying in-stock cut pieces, glass is likely cheapest. Especially from a glass/mirror shop, which is in every city

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MaybeYouHaveAPoint OP t1_is2em45 wrote

I'm not sure we've got a glass/mirror shop here -- that doesn't ring any bells, although I haven't tried buying glass much before. Searching online doesn't find me much.

But even at Lowe's, glass is clearly cheaper than TAP. I might adjust my plans to match the 30x36 size they sell. I'll just have to learn some new stuff about putting it in. Since I'm building the frame from scratch, all the "How To Install" videos don't help me much. Could I use a dado for this? I might need to make something closer to a traditional window frame (which is a lot more work, of course).

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Fake_Engineer t1_is2sgor wrote

How about an auto glass place? I've actually been surprised at how cheap Portland Glass has been for various glass projects.

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