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Old 06-25-2013, 07:11 AM   #1
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What should I use to kill this gap in slab?


My problem is this gap is making it so I cant screw down a toilet flange. So I was planning on filling in the space. What product should I use for this? Ill be wanting to drive screws into it.


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Old 06-25-2013, 07:34 AM   #2
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What should I use to kill this gap in slab?


Is that coming out of a concrete slab (SOG)?

I guess that it does not matter, but what was there before?

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Old 06-25-2013, 08:02 AM   #3
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What should I use to kill this gap in slab?


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Is that coming out of a concrete slab (SOG)?

I guess that it does not matter, but what was there before?

Ya, out of the slab. The old toilet flange wasnt screwed down, it came up with the old toilet when I pulled the old toilet off.
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Old 06-25-2013, 08:21 AM   #4
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What should I use to kill this gap in slab?


To answer your question.... maybe a hydraulic cement... it expands just a little for good grab.... I don't think it would cause any problem with your pipe....

I might wait for others ideas though...

I might also try sinking a tapcon or redhead into the slab, with a washer on it, to try and anchor any cement plug.

Best
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Old 06-25-2013, 09:27 AM   #5
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What should I use to kill this gap in slab?


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To answer your question.... maybe a hydraulic cement... it expands just a little for good grab.... I don't think it would cause any problem with your pipe....

I might wait for others ideas though...

I might also try sinking a tapcon or redhead into the slab, with a washer on it, to try and anchor any cement plug.

Best
+1
I'll add- allow room for the flange hub if it goes over the pipe.
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Old 06-25-2013, 05:46 PM   #6
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What should I use to kill this gap in slab?


This is the flange I bought...

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Old 06-25-2013, 05:47 PM   #7
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What should I use to kill this gap in slab?


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Originally Posted by MTN REMODEL LLC View Post
To answer your question.... maybe a hydraulic cement... it expands just a little for good grab.... I don't think it would cause any problem with your pipe....

I might wait for others ideas though...

I might also try sinking a tapcon or redhead into the slab, with a washer on it, to try and anchor any cement plug.

Best

So something like this?

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Old 06-25-2013, 06:18 PM   #8
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What should I use to kill this gap in slab?


yes... go easy with the hydraulic cement. It expands when it dries. It also sets up rather fast.
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Old 06-25-2013, 06:26 PM   #9
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What should I use to kill this gap in slab?


If the stub in the floor is 3" I would not use an inside flange- too restrictive.
It will be OK for 4" though.

If you choose to use an outside flange, wrap the pipe with 2 wraps of sill seal foam before applying the quickset, Then remove the wrap after it cures. This will give you a space around the pipe to receive the hub
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Old 06-25-2013, 07:06 PM   #10
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What should I use to kill this gap in slab?


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yes... go easy with the hydraulic cement. It expands when it dries. It also sets up rather fast.

What about this stuff?

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Old 06-25-2013, 07:22 PM   #11
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What should I use to kill this gap in slab?


You know.... I don't know how "you go easy" with hydralic cement. Seems to me you either fill the hole or you don't.

The expansion is pretty slight.... and I THINK you'd be fine. But you had your toilet in there fine with no setting screws, so maybe it's not that important to get that tight a bond (not like a hand railing balluster into a slab for instance).

Try the vinyl patch if you're uncomfortable with the hydraulic. And don't forget to shim the toilet level and throw a nice bead of caulk around it's base (leave several inches behind un-caulked in case you had a wax seal leak) I think you'll be fine that way too.

Plus if the vinyl did ever fail, you could dig it out and then use hydraulic.

Just my thoughts

Best

EDIT: As a comment, generally the vinyl patch is not a structural cement... and I guess my thought would be that you don't really need a heavy duty structural application.
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Old 06-25-2013, 07:25 PM   #12
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What should I use to kill this gap in slab?


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If the stub in the floor is 3" I would not use an inside flange- too restrictive.
It will be OK for 4" though.

If you choose to use an outside flange, wrap the pipe with 2 wraps of sill seal foam before applying the quickset, Then remove the wrap after it cures. This will give you a space around the pipe to receive the hub
Where do I get this sill seal foam? Im assuming you can pull it out after the cement dries?
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Old 06-25-2013, 07:35 PM   #13
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What should I use to kill this gap in slab?


It would be in the concrete isle of a big box.... only problem is I think the smallest roll is maybe 50 feet.

Take a look at it, and you'll understand, you can probably find some packing material or carpet padding or something else.Or put your flange on and then pack around it....assuming you have room to do so.
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Old 06-25-2013, 07:38 PM   #14
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What should I use to kill this gap in slab?


Is that drain pipe 3 or 4"
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Old 06-25-2013, 07:39 PM   #15
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What should I use to kill this gap in slab?


4 inch

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