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Home > Home & Garden > Plumbing   »   Concrete under Shower Pan after it's installed?

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Old Aug 21, 2009, 04:18 AM
gilderdave
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Concrete under Shower Pan after it's installed?

looking to reinforce my fiberglass shower by putting a hole in the wall on the side and shoving concrete or somethng else under there. any suggestions? not cracked yet, but it' "giving." also- toilet squeaks when we sit on it, and it seems to be coming from the conical crome part that sits flush with the floor. the connection from the tank to the floor is rigid and we thing a flexible tube may alleviate this since it seems to be coming from the floor interface. very annoying! any help is appreciated.

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Old Aug 21, 2009, 04:36 AM   #2  
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You "puddle" mounds of cement or mortar under the base,(especially around the drain).You could also beef it up with 2 X 4s. Anything tp prevent sag and give. Swap your toilet supply for a flexible one,(see image) and see if that doesn't help shut that pesky squeak down. Good luck, Tom
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Old Aug 21, 2009, 05:50 AM   #3  
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thanks. so you think i will be able to get access to put the crete in there? i need to tear out the sheet rock on the side to get to it, weave through the studs and get it in there some how. any material suggestions? applicator suggestions? a pole?


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You "puddle" mounds of cement or mortar under the base,(especially around the drain).You could also beef it up with 2 X 4s. Anything tp prevent sag and give. Swap your toilet supply for a flexible one,(see image) and see if that doesn't help shut that pesky squeak down. Good luck, Tom
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Old Aug 21, 2009, 05:59 AM   #4  
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Just get your hands dirty and push it in. For those hard to reach spots you could take and make a tee with a Small board nailed onto a pole or 1 X 1 and push the cement into position. Good luck, Tom
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Old Aug 28, 2009, 12:19 PM   #5  
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got the sheet rock off and i see a big hole where the drain goes down. it's a lot bigger than the pipe. do i plug it so the crete doesn't go in the hole and through my ceiling? though about wood blocks shoved in there. also when you say puddle mounds, you mean little hills here and there? just not sure if my subflooring can support a full load of crete under the whole shower. thanks!


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Just get your hands dirty and push it in. For those hard to reach spots you could take and make a tee with a Small board nailed onto a pole or 1 X 1 and push the cement into position. Good luck, Tom
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Old Aug 28, 2009, 12:34 PM   #6  
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Quote:
when you say puddle mounds, you mean little hills here and there? just not sure if my subflooring can support a full load of crete under the whole shower
That's what I meant. Not to fill up the entire area. I want support around the drain area. Cement or wood blocking will be fine but there should be no "give or flex" when toy step into the shower floor. Good luck. Tom
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Old Aug 28, 2009, 12:44 PM   #7  
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you did help me with the toilet, by the way! thanks. can't find where to click to give you credit for that. gotcha on the little piles. just need to know if i should block the hole around the pipe so the crete doesn't drip through. it's pretty big. also noticed a smell from the drain and there's black stuff in there which i try to clean periodically. keeps growing back and the smell returns. pooled water at the bend in the drain.



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[QUOTEwhen you say puddle mounds, you mean little hills here and there? just not sure if my subflooring can support a full load of crete under the whole shower.]
That's what I meant. Not to fill up the entire area. I want support around the drain area. Cement or wood blocking will be fine but there should be no "give or flex" when toy step into the shower floor. Good luck. Tom[/quote]
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Old Aug 28, 2009, 04:13 PM   #8  
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I had to do this "after the fact" too once. Cheap pan. So, I used 2 x's and cut them to fit
snug with some plate gasket stapled to the top so the tops of the 2 x's to the joint between the wood and the pan.
I did this by crossing the box (the cement sqaure or hole that surrounds the drain) at an angle three times (triangle) then I pushed mounds of cement around it. I had a hard time getting around it too, so I had to use a large kitchen utility spoon. I wanted a new one anyway.

It was very "supportive". (grin)
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Old Aug 28, 2009, 05:04 PM   #9  
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thanks! the space i have is tiny no matter how much drywall i take off because of the design on the shower. i like the idea of wood around the drain hole because i'm afraid i'm going to dump a bunch of cement down the hole and throught the ceiling! (second story bathroom) just trying to figure out what to put there to block it as i can't manipulate much in there... what's plate gasket and how did you use it? i didn't get that part...




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I had to do this "after the fact" too once. Cheap pan. So, I used 2 x's and cut them to fit
snug with some plate gasket stapled to the top so the tops of the 2 x's to the joint between the wood and the pan.
I did this by crossing the box (the cement sqaure or hole that surrounds the drain) at an angle three times (triangle) then I pushed mounds of cement around it. I had a hard time getting around it too, so I had to use a large kitchen utility spoon. I wanted a new one anyway.

It was very "supportive". (grin)
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Old Aug 28, 2009, 07:25 PM   #10  
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Some things to consider.

Using an expanding foam such as Great Stuff, to build dam around hole in flooring.
Using floor leveling material instead of concrete to support tub.

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cyberheater agrees: good idea
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