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Old 06-04-2012, 10:24 AM   #1
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Tiling a concrete patio


I'm putting in a paver patio and want to refinish the concrete landing with exterior ceramic tiles. It's just a small concrete slab with one step down to the pavers...

The actual issue is based on the paver height on the step, I want to add 1/2" - 3/4" of height to the landing, to make the steps equal. Hope that makes sense.

So, can I just use a 3/4" piece of cement board over the concrete and then mortar and tile it? I thought I would just lay the durock on the concrete and screw it down and then just tile it...

Any info much appreciated.

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Old 06-04-2012, 10:42 AM   #2
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Tiling a concrete patio


Nope--that will fail---

Do you have frost and freezing where you live?

If freezing is not a concern you could use deck mud--packed onto a fresh layer of modified thinset--to insure a good bond between the existing concrete and the new deck mud--

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Old 06-04-2012, 10:45 AM   #3
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Tiling a concrete patio


Why will it fail? Durock concrete board is exterior rated...

Yes, I live in Wisconsin - so we _can_ have tough winters.

So, I need to tile the concrete patio - and I need to raise the top landing, about 5x4 feet in area, up around 1/2 - 3/4". What is the best way to do that?
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Old 06-04-2012, 10:56 AM   #4
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Tiling a concrete patio


Laying Durrock over a concrete slab is not a good method--even setting in thinset and tapconing it down will fail,as water easily penetrates and saturates the board--a few seasons and it will disintegrate.


You may have success using deck mud---laid over a bed of wet thinset---water could still get into that and freeze,causing it to pop loose.

I'm not sure of a fail safe way to add a thin layer on top of an existing slab when freezing is a concern.

Let's see if someone else has a suggestion---
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Old 06-04-2012, 03:54 PM   #5
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Tiling a concrete patio


Water can penetrate the concrete board? The Durock says it can withstand water just fine - this from their website:

"DUROCK cement board Next Gen is moisture and mold resistant and does not deteriorate, swell, soften, decay, delaminate, or disintegrate in the presence of water, making it the perfect choice for baths, showers, kitchens, and laundry rooms. It is also suitable for exterior applications, including fences, mobile home skirting, agricultural buildings, garage wainscoting, and exterior finishes."

If this still is no good does anyone else have a way of adding a thin layer onto an existing slab before tiling?
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Old 06-04-2012, 08:06 PM   #6
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Tiling a concrete patio


Deck mud----that Durrock sandwiched between tile and concrete will be as wet as a sponge--repeated freezing and thawing will break the down to sand in a season or two--

Come on tile people help me out here---
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Old 06-04-2012, 09:43 PM   #7
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I'm good with deck mud... now to figure out what it is.
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Old 06-04-2012, 10:38 PM   #8
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How to build a shower - Building a shower pan with pre-sloped mortar bed, liner and curb.
This will show you a bit about deck mud

When packing it over existing concrete always trowel down modified thinset as you go--this will bond the two materials together.

Also consider Self leveling compound,if the surface build up is fairly thin--
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Old 06-11-2012, 05:30 PM   #9
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Tiling a concrete patio


Bump...

Anyone else have an opinion here? Is Deck Mud the best way to raise an existing small slab about 3/4" before Tiling? Is that better than just pouring a thin slab on top?

And on adding this extra height - should I put that black expansion joint stuff on the two edges that will touch the house?

When I tile - do I need a crack isolation membrane like Ditra? I've seen some use it and I've seen some just put thinset on the concrete and then tile. I am tiling both the treads and risers, would I use the membrane even on the risers?

After tiling do I grout the two outside edges that touch the house, or do I use a silicon caulk there?
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Old 06-11-2012, 05:37 PM   #10
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Here's a pic of the step and landing I'll be covering. Maybe this helps...

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Old 06-11-2012, 09:33 PM   #11
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Tiling a concrete patio


I can't give you a whole lot of info on tiling that stoop, but I can tell you that I wouldn't raise it one bit, as it's already too high. It's kind of a "cardinal rule" here in the snowbelt that you don't want a stoop that high with a screen/storm door intact. When you get any kind of snow, it's near impossible to open a door that swings outward.............

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