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i’ve been working around bathrooms in an apartment complex, repairing drywall damaged from tub leaks. i’ve noticed numerous cracks in these tubs, particularly at stress points where horizontal meet vertical members of these fiberglass units. the tubs are supported by foam.

when you look at it intuitively, the foam has little density and more than likely crushes from the weight of occupants and bath water, leaving no support directly under the shell once exited.

have others come to the conclusion that this approach is inadequate?

there would appear to be no practical remedy. suggestions?

if stall/tub liners are installed over the existing shell, isn’t the installer likely to break out the expanding foam for the liner’s support?

thanx,
brian