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Question DetailsAsked on 3/15/2014

Shower floor hairline crack


A quick question. I noticed a 2in hairline crack on the bottom of my shower. I think it is made of fiberglass. I haven't seen water seepage and it might be there for a while. I wonder if I should get it fixed ASAP. What's the best way to do it except replacing the whole shower.

Thanks so much.

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1 Answer


This is a very common issue with fiberglass showers, and certainly should not be ignored or put off because it can let water into your underlying floors, unless it has a proper drain pan under it.

In many cases it is due to lack of adequate pan strength in the first place, or fallure to put a mud (concrete) base under it originally. Can sometimes be repaired using a fiberglass repair kit, but commonly will crack again same or similar spot unless concrete/grout/rigid foam is placed in under it to provide better support.

Tough decision, because these frequently become a chronic problem. You might get an opinion and bid from a shower and tub installer to see what he thinks and $ estimate - probably about $150-200 to fiberglass repair, $400-500 range to repair and put in supporting mud, probably $1000-3000 to replace depending on shower design (most require surround be removed to remove the shower base, which almost always trashes the surround too), and replacement cost depends on whether you go with plastic or fiberglass again, or with tile (the more expensive end).

You can get a bit more idea on cost and a couple of comments on other people with same issue in the Home > Remodel - Kitchen and Bath (Bath and Kitchen ?) link in Browse Porjects, at lower left.

Answered 6 years ago by LCD

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