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Plywood backing to mirrors

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  • Plywood backing to mirrors

    I should probably just email Tom King but there are other experienced people her too!

    I am installing outdoor mirrors, and keep wondering : so we install plywood and frame the plywood to keep it from warping too much. Then we make sure the mirrors are free floating so they don't warp or break when the plywood warps anyway.

    While there is a limit to how big a span of 1/4" glass you could hang unframed/unbacked, do we really need that plywood backing? Wind and abrasion from particles behind the mirror are the two things I can think of - but I'm no glass engineer for sure. THoughts?

  • #2
    Any tiny bit of bend in that mirror will create a huge distortion, total fun-house mirror effect, and I can't imagine it not bending/distorting unless it has a solid backing.