The concept of a one-piece molded shower stall and tub has been around since at least the 1920s when it was a feature of Buckminster Fuller's visionary Dymaxion House. Fiberglass-reinforced plastics hadn't been developed yet so Fuller's design called for stamped copper, which may be why the concept never saw widespread commercial production. We haven't been able to determine who made the first FRP shower enclosure or when, but the application continues to keep fabricators busy today. The shower stall also showed homeowners some of the benefits of FRP - leak-proof construction and easy cleaning without frequent caulking, for example - which has since spawned a myriad of other uses in homes including cast polymer countertops, and the spas and pools.

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