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Old 02-18-2009, 02:56 PM   #1
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ourdoors Membrane failed

Hi all It's been a while...I am redoing my deck; I used Red Guard by Custom building supply. I fallow the specs to a T. laid my tile but didn't seal the mortar.

My tiles started moving I just laid them 8 months ago. Now that I am removing the tiles I see where the membrane has dissipated I assume that is due to the amount of time that is was exposed to the direct sun. Being that it is a waterproofing membrane.

I am scraping the red guard off and I think I am going to go ahead and just apply some last o merit beings it was originally a roofing compound my questing is will mortar adhere to it...

I am a commercial Painter of 25 years dealing in painting and special coating and waterproofing I just don’t know about tile over waterproofing
That is not my area of expertise


A drop cloth isen't to catch paint, It's to protect what is under so wipe the drips as you go and don't track.
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Old 02-18-2009, 03:35 PM   #2
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What substrate did you apply the reguard to? Not sure how it is effected by UV (if it sat for a while during construction). If your tiles moved it is more than likely a poor substrate to blame, not the Redguard.

This would have been a better job for Kerdi/Ditra.

Now that you're considering elastomeric (I'm assuming that was the term you were after) how do you intend to tile over it? Or do you intend to?


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