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Old 05-11-2010, 11:54 AM   #1
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Porcelain tile on an outdoor sundeck...


I have porcelain tile installed on an outdoor sundeck here in South Florida...I have been having some water intrusion issues and want to seal the floor.....the grout was initailly waterproofed with penetrating sealer and mortar mix...but I dont think this is enough for an outdoor application such as this....the floor is only about six months old and some of the grout is showing signs of shrinkage due to being in the direct sun all day...I need a good sealer that will withstand the elements......thanx in advance...Rick

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Old 05-11-2010, 07:05 PM   #2
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Porcelain tile on an outdoor sundeck...


Grout sealers are not waterproofers.

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Old 05-12-2010, 12:06 AM   #3
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Porcelain tile on an outdoor sundeck...


Rick,

As Bud said sealers do not waterproof anything. Also grout is NOT a waterproofer, it's a joint filler that is not adversely affected by water.

It's likely your problems were caused by some installation method deficiencies. I would need to know how everything was done and with what specific products. Also need to know the conditions of the substrate and the exposure orientation of the sundeck.

You can start with the slab and work up from there.

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Old 05-12-2010, 06:49 AM   #4
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Porcelain tile on an outdoor sundeck...


Grout doesn't just shrink away due to sunlight either. Sounds more like it wasn't filled all the way and the grout is slumping into the joint as the moisture comes out of it.
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Old 05-12-2010, 11:32 AM   #5
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Porcelain tile on an outdoor sundeck...


Quote:
I have been having some water intrusion issues and want to seal the floor
What are "water intrusion issues"? I don't know what that means.

Quote:
the grout was initailly waterproofed with penetrating sealer and mortar mix
As mentioned...the sealer won't waterproof the grout. What is the meaning of the "mortar mix" comment in that statement?

Quote:
the floor is only about six months old and some of the grout is showing signs of shrinkage due to being in the direct sun all day
What type and brand of grout was used? Be specific. Standard grouts won't shrink from the sun beyond some minimal shrinkage that may occur during the first few hours immediately following the initial installation.

Quote:
I need a good sealer that will withstand the elements
You should first understand the function of the products you are trying to use. Do you have a picture to show us?
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