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Old 03-04-2018, 07:30 PM   #1
Blavery
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Kerdi Drain foam spacers

Hello, Iím about ready to install my Kerdi drain and noticed that the included styrofoam spacers only get the drain 13/16Ē above the subfloor. The instructions indicate a minimum thickness of 1Ē of mortar at the bonding flange. Am I missing something here? I suppose I can easily add some height to the spacer, but why the inconsistency. Even if I flip the styrofoam, itís still 13/16Ē. (Spacer is symmetrical). Should I follow the spacer height or the instructions? Odd that they would include precut spacers that donít get the drain at the proper height.
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Brian
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Old 03-04-2018, 07:33 PM   #2
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Welcome to the forum, Brian.

Are you over a wood subfloor or concrete?

If concrete, I'd have no problem going with the spacers. If over wood, then set it up to 1 1/4" or more.
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Old 03-04-2018, 08:07 PM   #3
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Kevin, Iím going over 3/4 plywood subfloor.
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Old 03-04-2018, 10:25 PM   #4
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Set the drain flange at a minimum of 1 1/4" off the subfloor.
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Old 03-05-2018, 10:49 AM   #5
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Hi Brian,

I think Kevin is thinking you're going to make your own floor from mortar. If you are using the Kerdi foam tray you don't want the drain any higher than the spacer.
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Old 03-06-2018, 09:51 PM   #6
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I asked the same thing a month or two ago! I think the syrofoam spacers are made to be placed on top of wire mesh...giving you that extra little bit to achieve 1" from the top of subfloor to b/flange.
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