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-   -   Curbless shower Question (https://www.johnbridge.com/vbulletin/showthread.php?t=68898)

TampaDoc 12-12-2008 01:34 PM

Curbless shower Question
Well I've got everything done on the upstairs bath. The downstairs however has had no movement. The medicade waiver that was suppose to pay for the ADA stuff hasn't come through and I need to have that bath finished. So I guess I'm doing it. Here is the big question. I'm going curbless on a cement slab with Kerdi. If it goes to 3/4 of an inch above grade for the slope, that's pretty thin. It would seen impracticle to mesh in that thin of a mud bed. Do you just do the mud bed on the cement with no metal?

Somone enlighten me...


chuck stevenson 12-12-2008 03:02 PM


Anyway to saw cut the slab?

Schluter makes a ramp that works with the Kerdi pan.

TampaDoc 12-12-2008 04:04 PM

Thansk Chuck
The drain is at the end of the run, so it's not very deep(right below the cement). and the location is not suitable either as it's against an outside wall and would interfere with the foundation. I was thinking I could skim some of the top to gain some slope but it still goes back to my first question.

I really don't want a ramp If I can avoid it. It would be a stumbling hazard for my boy.

TileArt1 12-12-2008 07:16 PM

Hi Jim,

Yes, you can do the deck mud directly on the concrete without wire mesh. Just make sure to use loose thinset on the concrete to adhere the mud bed. Make sure you pack your mud bed real well, beat the hell out of it. :D

Hope that helps.

TampaDoc 12-14-2008 07:33 AM

Thanks Roger, I thought that there must be a way but I don't think I follow you on using loose thinset on the concrete to adhere the mud bed. Can you elaborate please? :scratch:


scuttlebuttrp 12-14-2008 07:49 AM

I beleive he's advising you to mix thinset much looser than normal to bond your mudbed.
Thinner, more soupy like, not like soup but thinner than normal.

TileArt1 12-14-2008 08:08 AM

Royce is right. You want to mix it thin then put down a layer of the thinset before packing the mud atop it. This will adhere the mud bed to the concrete so it will not move in the same manner as using wire lathe on wood. It will give the mud bed something to grab onto.

TampaDoc 12-15-2008 02:33 PM

Thanks guys, I'll post a pic when I prep the floor.

ceramictec 12-15-2008 08:13 PM

how big is your shower area going to be?

and how big is your room?

in my opinion its best to chip out the shower area, chip around the drain, in stall new Kerdi drain, and remud shower.

I would want to pull mud in the whole bathroom and have the main floor higher at the doorway.

easier to chop out and depress the shower itself.
I have done it a few times this way and have one coming up in Jan.

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