In an older building, with a tub/shower combo, the shower surround seems
to be panels of a sort of waterproof surface on (what is the 4x8 panel
material that looks like pressed cardboard? I can't think of the name).
The panels are secured on top and bottom? with aluminum channels, and
caulked. Installed over plaster or maybe drywall. These are not a one
piece tub surround, or a multipiece tub surround, but individual panels.
Does anyone still make the panels (not a tub surround, but individual
panels) for this application? One other problem is the tub surround has
5'4" dimension as the long one, rather than 5'0".