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Old 09-26-2012, 11:53 PM   #1
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RedGard on Concrete floor before tiling?


Hi I was about to use RedGard on a long bathroom's concrete floor before tiling.
Was planing on using RedGard for crack prevention not for water proofing.

The Concrete is in pretty good shape just has a few hairline cracks that run across it. The floor is only about 22 years old. One crack is about 1/8 inches thick running across the floor and about 2 are about 1/8 inches thick. The rest of concrete seems like it's in good shape.

Does RedGard have to be applied all over the concrete? Or if I could just paint it over the cracks

Also after it is painted on, is it OK to walk on it for setting up the tiles and doing a dry run with the tiles? Or will I need to put construction paper down to protect the RedGard.

Also, I'm guessing if I do put RedGard all over the concrete it will be interesting putting the chalk marks and marking where tiles go....hmmm

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Last edited by crayola110; 09-27-2012 at 12:06 AM. Reason: thx
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Old 09-27-2012, 02:59 AM   #2
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RedGard on Concrete floor before tiling?


Redguard can be used as an uncoupling membrane---if you don't cover the entire floor---and just do the crack areas---make the band about two feet wide.

Once dry you can walk on it without an issue.

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Old 09-27-2012, 01:27 PM   #3
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RedGard on Concrete floor before tiling?


Thanks Mike. I'm just trying to keep costs down as I would need to buy 2 gallons if I had to do the whole floor. I think I'll just do it over the cracks only. This crap is expensive! haha
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Old 09-28-2012, 06:10 AM   #4
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RedGard on Concrete floor before tiling?


I use Hydroban---almost twice as expensive----but for your use Redguard is a fine choice----Mike----
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Old 09-28-2012, 01:49 PM   #5
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RedGard on Concrete floor before tiling?


sorry one last question do you have to create a primer by diluting 4-1 part water. I had read somewhere on internet someone did that, but wasn't sure since my concrete floor is fairly clean and just 22 years old?
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Old 09-29-2012, 10:24 PM   #6
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RedGard on Concrete floor before tiling?


Follow the manufactures instruction---they know better than a stranger on the internet--I'm a stranger-

Seriously---go to the maker----the more you know about a subject,the more you will see how much truly bad information is floating around on the web.
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Old 10-11-2012, 06:35 PM   #7
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RedGard on Concrete floor before tiling?


Also, I'm guessing if I do put RedGard all over the concrete it will be interesting putting the chalk marks and marking where tiles go....hmmm[/QUOTE]

This is an easy fix. After you put your chalk line down spray line with hairspray wait to dry. Works great, try on any uncoupling membrane

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