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Old 02-11-2010, 09:08 PM   #1
Army1
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pre-slope mortar bed problems

During the bathtub removal phase, I was unable to relocate drain from near the end wall (9 ") to a more central spot. As a result, the new drain base is not flushed with the concrete floor and it's off about 1/4 " on one side. Should i spread the mud evenly around the perimeter and compensate for the error by a change in slope (> 1/4 " per foot in some areas)? The area is 30X60. I don't want my final mortar bed to be affected by this error. Thanks
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Old 02-11-2010, 09:22 PM   #2
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Al,

Welcome to the forums! I think I would need a pitcher or a little more information as to what you are trying to do. Not sure what you mean by this "As a result, the new drain base is not flushed with the concrete floor and it's off about 1/4 " on one side." What kind of drain are you talking about? The mud bed should have a 1/4" per foot fall from the furthest point from the center of the drain. The fall at the 9" side will be much greater. If you don't build you mud bed that way then the bottom row of tile won't be uniform and I believe it'll be quite noticeable.

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Old 02-12-2010, 05:34 AM   #3
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Al, if the bottom section of the drain is tilted out of level, you can cut some of the threads off of the top grate so it just sits on the bottom flange without screwing in at all. That way it can be placed level then mud packed around it to hold it in place.
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Old 02-12-2010, 03:01 PM   #4
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That is what i was thinking. The edge height of the sloping mortar bed does not have to be even all the way around my frame box as long as i maintain a minimum of 1/4"/ft slope towards the base of the drain. Because of the location of the drain, the thickness of the sloping mortar bed will vary from 1/2" to 1-3/4". Once i install the membrane and pour the final mud floor, then i have to make sure the edge height is correct all the way around. Does this sound right? See attached file
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Old 02-12-2010, 06:37 PM   #5
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The preslope isn't critical, as long as it has some pitch, 1/4 inch per ft is recommended but it can be less where the drain is close to the wall. The top mudbed is critical and it's ideal to have the perimeter level all the way around. I have tiled situations like you have and made the top mud bed out of level at the perimeter so it's not so steep at the drain end. You just have to cut the bottom row of wall tiles to fit the slope.
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Old 03-17-2010, 03:12 PM   #6
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Move a toilet...need opinion

First i want to say Thank You for all the help. This site is AWESOME.

My wife and i are remodeling our bathroom and we have a disagreement about relocating the toilet. As you can see from the attachment the center of the toilet drain is about 12 inches from the edge of the unfinished curb. We have enough room to move the toilet drain another 4-6 inches away from the curb but she is afraid of the damage that it will cause to the concrete slab ( stress cracks, etc). Would you move the drain? I don't have any of the tools for this type of a job. Is this very complicated or should I hire a professional to do it.? If so, approximately what would that cost. I have read the other threads on this subject but i would like another opinion. Thanks for everything
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Old 03-17-2010, 03:36 PM   #7
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What those other threads said, as long as they suggested moving or relocating the toilet.

Price would depend on where you are, what kind of pipe, condition of pipe, slab-on-grade or post-tensioned, etc... can you fill in any blanks for us? Any other possible locations available? or orientations, like moving it and turning 45 or 90 degrees?
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Old 03-17-2010, 03:51 PM   #8
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Thanks for the reply. It's on a concrete slab and it would move at most 4-6 inches along the same horizontal plane maintaining the same distance from the finished drywall. The drain is PVC. The closet ring is cracked on one edge and i will have to either replace it or fix it. We will be adding ceramic tiles to the bathroom floor. We live in Orlando, Florida.
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Old 03-17-2010, 06:07 PM   #9
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You can rent a water concrete saw that will cut right into to the floor, tell the rental place what your doing they will give you the right saw.it will make a big puddle though but you wont have much dust.that and a sledge hammer should do it.

Got to know where you drain is in relation to the flange to keep from damaging it too much.

After you replace the plastic drain, back fill with a bag of concrete
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Old 03-17-2010, 06:55 PM   #10
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In about 20 minutes you can take out the concrete you need with one of these. Keep on the lookout for rebar. You'll need something to cut it if its in your way. Use a shop vac to get the chipped concrete out of you way while hammering out the hole.
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Old 03-18-2010, 04:34 AM   #11
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I agree, Al. The PVC pipe makes this a fairly easy DIY job.
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Old 03-18-2010, 10:00 AM   #12
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Thanks everyone for all the help. I'll start the project tomorrow. I plan on using a skill saw with a 7" cement cutting wheel and a spray water bottle to minimize the dust. Once I make all the necessary cuts i'll use a Bosh electric hammer that i was able to borrow from a friend. Once I get to the PVC drain pipes I should be able to see what i need to replace. Thanks
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Old 03-21-2010, 11:57 AM   #13
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Move a toilet...need opinion - Part #2

Well i finally broke the concrete slab in the bathroom and now i have access to the drain pipe. What i'm trying to do is move the toilet drain, about 4-6 inches, and stay within the same plane of the current toilet drain location (movement will be towards the bottom of the picture). The straight drain pipe that feed the main line is about 9 inches below the top of the slab floor. What I was thinking of doing is using a combination of a 90 and 45 degree elbows and spacers to get me the correct location of the new drain. It seems weird but will that work? I'm hoping not to break-up anymore concrete. Please help.
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Old 03-21-2010, 12:10 PM   #14
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Welcome, Al.

It'll help a lot if you'll keep all your project questions on this thread rather than starting a new thread with each new question.

I would absolutely avoid adding any quarter bends (90-degree elbows) to that line. Looks like an eighth bend, if cut back far enough along the pipe, might get you the required movement. A sixteenth-bend might even do it, and that would be preferred if it'll work. A fella wants as few and as little in the way of elbows as he can get by with in a WC drain line.

If you gotta break more concrete, you break more concrete, far as I'm concerned.

My opinion; worth price charged.
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Old 05-02-2010, 12:59 PM   #15
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Stress crack in Durock

During tile installation i notice a horizontal stress crack on the shower vertical wall ( see photo ). This is one area that i was not able to install vertical or horizontal supports do to shower piping. In this area, Durock is fasten to the studs at 22" OC with screws. Should i cover the stress crack with Durock glass fiber tape and thinset or should I make a horizontal stress relief cut across the board in the crack area? This Durock has been in place for over a month. Please help
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