Fiberglass Tub Supported With Concrete?

[Andrew10]

In a brand new house, have a fiberglass tub/shower that has a dip in the middle from lack of support and thinness of fiberglass. When you are showering you are constantly sliding towards the low point (and you can feel it giving) which encompasses the middle 2/3rds of the tub. Also have a constant water puddle in this area.

It has some foam under it but is not supporting and pushing the fiberglass up to prevent the dip. Is it standard procedure to try to put concrete under the tub for support? Looks like that would be dangerous because if one slipped in the shower, would be like falling on a concrete floor. Thanks much!!

 

[Doghouse Riley]

If it's a brand new house, I'd get the builders back in to fix it.

 

[Andrew10]

If it's a brand new house, I'd get the builders back in to fix it.

That is why I am asking.......... they are wanting to pack concrete under it and that does not seem or sound right and was hoping someone who is versed in plumbing might answer. Thanks for the obvious though.

 

[Doghouse Riley]

If this has a conventional shower tray, these are usually laid on a reasonably thick piece of plywood on top of the floor boards. The drain pipe passes through both.
Is your floor concrete?

 

[Andrew10]

" In a brand new house, have a fiberglass tub/shower"

 

[SandburRanch]

If it was my brand new house I wouldn't allow those tub/shower people back in the back door much less the front door but hire a competent tub installer to remove that one, install a new tub and the original contractor would be paying for it including labor. Yes sir, I'll answer your question now, that would be just after the court case. That type of contractor needs needs to be put out of business.