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Old 01-31-2013, 01:17 PM   #1
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creaking tub


We have a fiberglass tub/surround that creaks as you step in it, or shift your weight in it. I guess it didn't have the correct stuff sprayed under it after it was installed?

I'm just curious if it's something that can reasonably be fixed now, and so that I can understand it so when I remodel (in a few years hopefully) I'll be able to make sure it gets done right.

Great thanks for any info!

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Old 01-31-2013, 01:32 PM   #2
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creaking tub


Some use a bed of morter under them that the unit gets bedded in.
There's not a whole lot than can be done once it's closed.
Someone's going to suggest using spray foam. Any time I've seen it done it did little good because there's no way to get it in there where it needs to go, it compresses over time. And will make it far harder to take it out later.

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Old 01-31-2013, 01:34 PM   #3
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Originally Posted by joecaption View Post
Some use a bed of morter under them that the unit gets bedded in.
There's not a whole lot than can be done once it's closed.
Someone's going to suggest using spray foam. Any time I've seen it done it did little good because there's no way to get it in there where it needs to go, it compresses over time. And will make it far harder to take it out later.
Ah interesting. But doesn't the tub expand and contract when filled with water, and then emptied? How can something firm like mortar work?
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Old 01-31-2013, 01:38 PM   #4
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creaking tub


By any chance, do you have an access panel in one of the walls behind or beside the tub, that allows you to see in there?
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Old 01-31-2013, 01:42 PM   #5
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That's the whole point of using morter, so it will not flex.
All that flexing at some point is going to cause it to crack and leak.
Some newer units come with a hard foam built into the base of the init.
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Old 01-31-2013, 01:56 PM   #6
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By any chance, do you have an access panel in one of the walls behind or beside the tub, that allows you to see in there?
Kind of yes, but i don't get a great view. I can see the plywood subfloor. Also the floor below doesn't have a finished ceiling and I can see the floor from below. No water issues yet.

If I had to guess, it's been this way for 10-20 years, but I am not positive.
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Old 01-31-2013, 01:57 PM   #7
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Originally Posted by joecaption View Post
That's the whole point of using morter, so it will not flex.
All that flexing at some point is going to cause it to crack and leak.
Some newer units come with a hard foam built into the base of the init.
OK yeah I was worried about that. I guess it's good that I am already planning the remodel.

Thanks a ton for the info and advice.
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Old 01-31-2013, 01:58 PM   #8
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No water issues yet.
That's where I was going. Good to know that's not the case.
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Old 01-31-2013, 02:01 PM   #9
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That's where I was going. Good to know that's not the case.
Time to keep my eyes open.

Let me ask you something: I am a DIY amateur but I'm not too shabby or sloppy. I research like mad and my projects thus far have been successes.

When I go to demo this bathroom and re-do it, with proper care and research will I be able to figure out the correct way to do the tub so it the new one doesn't have this problem? Or is it advanced, requiring a plumber?
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Old 01-31-2013, 02:10 PM   #10
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A lot depends on the condition of the plumbing.
Old cast iron drains, steel supplys all should be replaced with Pex, copper, CPVC, and PVC drains.
Depending on how old the control valve is I'd also replace it. (do not go cheap!)
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Old 01-31-2013, 02:18 PM   #11
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Originally Posted by joecaption View Post
A lot depends on the condition of the plumbing.
Old cast iron drains, steel supplys all should be replaced with Pex, copper, CPVC, and PVC drains.
Depending on how old the control valve is I'd also replace it. (do not go cheap!)
Not super worried about the plumbing, it was the creaking tub thing that worried me. You said that a lot of the new ones come with a foam base that takes care of this?

ETA: oh yeah, glancing quickly at Home Depot, I see that many are advertised with "Built-in leveling support pad". OK nice!

Last edited by Amateuralex; 01-31-2013 at 02:21 PM.
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Old 01-31-2013, 02:34 PM   #12
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creaking tub


Quote:
Originally Posted by Amateuralex View Post
Time to keep my eyes open.

Let me ask you something: I am a DIY amateur but I'm not too shabby or sloppy. I research like mad and my projects thus far have been successes.

When I go to demo this bathroom and re-do it, with proper care and research will I be able to figure out the correct way to do the tub so it the new one doesn't have this problem? Or is it advanced, requiring a plumber?
It depends on the tub that you get but yeah you shouldn't have any problems installing a new one. Its pretty straightforward.
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Old 01-31-2013, 02:37 PM   #13
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Almost never do to two differant tubs have the exact same drain locations.
1/4 one way or the other can be a real pain.
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Old 01-31-2013, 02:41 PM   #14
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Almost never do to two differant tubs have the exact same drain locations.
1/4 one way or the other can be a real pain.
OK, that helps a lot actually, thanks a ton! Something else I can plan for and research.

The floor below this provides awesome access to the plumbing etc, so I may have a vaguely easy time of it. At least I won't be fighting access issues.
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Old 01-31-2013, 02:52 PM   #15
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Is there already a trap under the tub, if it's an old drumb type that would need to go and a vent added.
http://www.bing.com/images/search?q=...lectedIndex=13

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