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Tiling Over Exposed Aggregate Concrete Large Control Joints

 
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Old 05-19-2019, 10:34 PM   #1
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Tiling Over Exposed Aggregate Concrete Large Control Joints


We have an approx 30x12 exposed aggregate patio. It consist of 6x6 individual concrete pads with 2 inch wood filled joints separating each pad. There is only 1 piece of rebar connecting each 6x6 pad to the next. We would like to tile over this area but are worried about the movement of each individual pad that would possiably crack the 12x24 tiles that would overlay the joints. Is it possiable to tile this area safely? Our orginal plan was to remove wood and fill all the 2 inch gaps with cement, use self level to correct any low spots and tile over the area. The patio is about 40 years old.
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Old 05-19-2019, 10:41 PM   #2
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Re: Tiling Over Exposed Aggregate Concrete Large Control Joints


Maybe hire a professional and do what they suggest

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Old 05-19-2019, 10:43 PM   #3
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Re: Tiling Over Exposed Aggregate Concrete Large Control Joints


That's a tough one. You would need to treat each pad like it's own system using expansion joints to bridge the gaps. I probably wouldn't touch it personally without ripping it our and replacing with a solid slab.
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Old 05-19-2019, 11:19 PM   #4
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Re: Tiling Over Exposed Aggregate Concrete Large Control Joints


My guys could have ripped out and ready to pour next day.


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Old 05-20-2019, 09:49 AM   #5
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Re: Tiling Over Exposed Aggregate Concrete Large Control Joints


If you tile over the joints it will crack. How about tiling each "pad" separately, with an expansion gap around each perimeter?

For the gaps, maybe use the same material used around pool coping--that stuff is pretty durable,flexible, exposed to chemicals, water, sun, etc.

I'm sure you could get a close color match/contrast. Ask a pool building company.
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Old 05-20-2019, 10:49 AM   #6
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Re: Tiling Over Exposed Aggregate Concrete Large Control Joints


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My guys could have ripped out and ready to pour next day.


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Right there.

Much better to do it right, from the beginning.
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Old 06-13-2019, 08:51 AM   #7
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Re: Tiling Over Exposed Aggregate Concrete Large Control Joints


If tearing out and re pouring is not an option for you then the next best thing would be to treat each "pad" as its own and leave expansion gaps as suggested above. I would start over and do it right from the beginning. So, shortened version, I agree with the advice given.

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