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Do UV rays "bounce" and/or reflect?
 
My reason for asking is that exposed structural fiberglass (and other materials such as PVC) normally need to have UV inhibitors or a protective coating if they are used in exposed (outdoor) conditions.
 
But what about something placed under a bridge deck for example.  It would not get direct UV radiation, but could there be long term deterioration due to reflected UV?

David Finley
M. David Finley, P.E., P.A.
2086 SW Main Boulevard - Suite 111
Lake City, FL  32025
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