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Unread 05-11-2009, 02:41 PM   #1
Page
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Schluter Kerdi As Crack Isolation membrane

Has anyone used Schluter Kerdi as a crack isolation membrane on concrete slab control joints? Does it meet specs? If so, how is it applied? If not, what do you recommend? Thanks.
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Unread 05-11-2009, 03:01 PM   #2
ddmoit
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I'd suggest Noble's membrane. Kerdi does not claim to have crack isolation properties.
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Unread 05-11-2009, 04:12 PM   #3
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It's in the financial interest of the manufacturer of any tile installation products to claim any and all potential applications for their products, Page. Check the advertisements and specifications for Kerdi and see if you find reference to A118.12 in there.

My opinion; worth price charged.
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Unread 05-11-2009, 04:27 PM   #4
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So.....the answers no, right?
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Unread 05-11-2009, 04:51 PM   #5
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Correct. Schluter doesn't make that claim for their Kerdi product. I'll second Dan's recommendation for the Noble product.
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Unread 05-11-2009, 05:34 PM   #6
ceramictec
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Schluter®-KERDI

Schluter-KERDI is a bonded waterproof membrane with limited crack-bridging capabilities. It is made of soft polyethylene, which is covered on both sides with a special fleece webbing to anchor the membrane in the thin-set mortar.
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Unread 05-11-2009, 05:51 PM   #7
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If you need crack isolation then you would want something that meets ANSI 118.12. Kerdi does not.

If all you're after is a little extra insurance, it might be better than nothing. I wouldn't use it as a crack isolation material when there are other, better alternatives.

Quote:
Originally Posted by from the Schluter Kerdi specs
Schluter ®-KERDI is suitable for wall and floor surfaces where protection against the penetration of moisture or other harmful substances is necessary. Applications include showers, steam showers, tub surrounds, and areas surrounding swimming pools.

Schluter ®-KERDI meets the American National Standard for Load Bearing, Bonded, Waterproof Membranes for Thin-Set Ceramic Tile and Dimension Stone Installations (ANSI A118.10) and is listed by cUPC®.
Found this thread too, interesting reading. Check out Brian's last post where he relays back what his Schluter rep said... http://www.johnbridge.com/vbulletin/...ad.php?t=59793


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Unread 05-11-2009, 07:48 PM   #8
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blah!

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