Fiberglass shower floor repair possible?

6 Replies

I have a fiberglass shower surround that has a hairline crack in the base. It's been too long and the floor underneath is soft so I can't inject epoxy and reseal it. There is a guy locally that does this and has great luck, but he wouldn't warranty this one because of the subfloor being too soft. Is there any good alternative to seal it and get a few more years out of it? As far as I know my only option is to rip it out and redo it but thought it was worth asking first. Thanks

I'm afraid you just need to tear it out, fix the floor and start over.  If you wait, the floor damage (and mildew) will only get worse and may spread elsewhere. 

When you set the new unit, make sure to support it from underneath. A common method is to lay a bed of mortar under the pan. That way, the fiberglass floor will not flex when stepped on, which may be why this unit failed.

Your big problem is the subfloor.  You need to replace the sub floor and start over. Sorry!   

Thanks for the input. I might try the Great Stuff rather than a mortar bed.

JD, it's not nearly that soft. It's just a little soft on the edge where the crack was. I had the ceiling opened below during remodel and from below you can't tell. Even if the subfloor got soft I don't know how the fiberglass base would give way, they're still pretty solid.

Thanks again.

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