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Old 08-18-2008, 01:25 PM   #16
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How to cut this drain pipe?


Mechelle and ccarlisle,

I do not have first hand knowledge, but in all of the threads on this and other forums, that is what the pro's recommended. Why don't you start a new thread in the remodeling forum and see what the pros say.

Again, I'm sorry if I interfered with this thread, but I raised this flag based on what I have heard and didn't want you to make a mistake.

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Old 08-18-2008, 09:45 PM   #17
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How to cut this drain pipe?


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Originally Posted by ccarlisle View Post
Mechelle:

Oh I see...if you read that somewhere, that's fine then. I didn't know what was underneath the primer nor did I figure it was necessary to prime it. But I'd be interested in knowing where you read that because now is the time be absolutley sure that your Kerdi is going onto an approved substrate, not sometime down the road when you're standing in the shower with water coming down and a wall tile in your hand...

The point is that Kerdi is applied to certain substrates using thinset; the thinset cures by hydration (not evaporation) and therefore the substrate on which it is sitting is not all that important, as long as it is solid. But it must have a bite to it, to grab the thinset. Thus, cbu, and standard gyproc are suitable substrates for Kerdi. Not even green board is suitable - although not required - because after all the Kerdi is a waterproofing membrane and therefore cannot damage what is behind it...as long as the substrate is solid and has a bite to it, it's OK.

I just had a feeling that a slick, primed surface may give you adhesion problems...check on that, or at least give Schluter a call ontheir toll-free # and have them give you the OK.

Unfortunately, there are plenty of inspectors out ther who want to have the last say in the matter.

Just a suggestion... but again, the time to make sure is now - not later.
we've worked for a gc in the relatively local area (read)ONCE, that installed tile directly onto sheetrock. I guess thats' neither here nor there, however..........
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Old 08-19-2008, 06:34 AM   #18
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How to cut this drain pipe?


Alan:
"we've worked for a gc in the relatively local area (read)ONCE, that installed tile directly onto sheetrock. I guess thats' neither here nor there, however.........."

On the contrary...it just goes to show you how varied the field is when it comes to tiling.

I see the good, the bad and the ugly. The "ugly" are about 25% of the group, the guys who are not only bad at what they do but who don't know any better because they don't care to know. The "bad" try to improve, don't learn, and are just not good at what they do. Unfortunately, they are the largest 55% of the group.

Then, there is the 'good' group - who keep on learning, are therefore knowledgeable, and good at what they do and who make up about 20% of contractors out there.
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Old 08-19-2008, 09:12 AM   #19
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How to cut this drain pipe?


Now I am very worried about the wall. I definitely need to open another thread.

I am a diyer, to be. You guys are pro, whatever you say exclusively impact on what and how I do.

I am opening a topic "Can I install Kerdi over primed drywall in a basement bathroom" in remodeling. Please keep your advise going in there when you have the time. Thank you, love you guys
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Old 08-19-2008, 11:44 AM   #20
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How to cut this drain pipe?


Mechelle,

I know nothing about Kerdi, but here's how you connect the drain.

First, get a shower drain similar to this one, an IPS 4821.

http://www.ipscorp.com/watertite/recshwrdrn.html

Remove the shower base and install the drain. Using a straight edge, such as a 4' level, measure the distance from the bottom of the base (which would be the concrete level) and the "make up" (the inside end of the glue joint) on the shower drain. Then, using the straight edge on the floor, cut the pipe at that distance below the floor.

If the pipe is glued in the trap (you do have a trap under there, right?), you can buy a small cutting wheel that goes in a drill and cut the pipe from the inside.

If it's not yet glued just pull it out and cut it.

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