Poor Grout?? - Tiling - Contractor Talk

Poor Grout??

 
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Old 03-24-2019, 10:43 AM   #1
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Poor Grout??


this is my house, I did the tile about 5 years ago
I have a few spots that are popping out
maybe I just didn't do it right either
what so you think from looking at it
larger area wher either came out is over a beam in the basement, so it's no from flex in the floor

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Old 03-24-2019, 10:57 AM   #2
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Re: Poor Grout??


It could still be from vibration as the rest of the floor flexes, or a bit too much water. Just guessing, though.

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Old 03-24-2019, 11:22 AM   #3
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Re: Poor Grout??


Looks like it wasn't packed into joint.
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Old 03-24-2019, 11:37 AM   #4
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Re: Poor Grout??


Any noticeable deflection in the floor?
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Old 03-24-2019, 11:59 AM   #5
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Re: Poor Grout??


Sure likes like the tile has some kind of movement. Any repair job I've ever done with grout behaving like that, is tile movement. Even on concrete, tho usually due to a poor bond of tile to floor. Often tile seems to be set good enough too. But always sounds different when tapped.

What about the center beam moving up and down in relation to the support walls. Center line at those areas acting like a hinge point. Then putting stress on the grout?
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Old 03-24-2019, 12:23 PM   #6
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Re: Poor Grout??


I'd also second that you can have deflection over a bearing point. Even if the bearing is solid. Imagine a beam with joists on each side deflecting. They make the shape of a W. The largest change in direction is over the beam.
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Old 03-24-2019, 12:25 PM   #7
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Re: Poor Grout??


So many things it could be though. To be honest it looks like a technique problem. Hard to describe but the grouting just looks weird. Too dry, too wet, surpassed pot life limits, grout lines not cleaned well enough first, etc etc.
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Old 03-24-2019, 01:02 PM   #8
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Re: Poor Grout??


Flex plus too much water in the grout.
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Old 03-24-2019, 02:01 PM   #9
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Re: Poor Grout??


it was a out the last area I grouted, maybe to dry?
the rest of the floor has some movement, old house with 2x8 joists 16" oc spanning 14'
i worked it in really well with a grout float, let it skin over then cleaned and buffed smooth with a sponge
I'm not really a tile guy, so I'm probably not the best at it
wasn't sure if maybe there was a better grout, or if I should just try again

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Old 03-24-2019, 02:02 PM   #10
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Re: Poor Grout??


it took a couple of years before it started crack
my 2 year old has been digging it out with her hulk fingers for the past year

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Old 03-24-2019, 02:06 PM   #11
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Re: Poor Grout??


As I understand it, mixing the grout with latex additive instead of water will be more forgiving with movement.

Flexcolor CQ ( about $50/pail) is another one that flexes.
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Old 03-24-2019, 02:10 PM   #12
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Re: Poor Grout??


this is what it looks like near where I started grouting

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Old 03-24-2019, 02:12 PM   #13
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Re: Poor Grout??


my initial thought was it might of gotten to dry and did not pack or fill very well into the grout joint

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Old 03-24-2019, 02:22 PM   #14
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Re: Poor Grout??


A lot of maybes. Instead if getting too dry, it would have been setting.
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Old 03-24-2019, 02:28 PM   #15
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Re: Poor Grout??


It's about 250 sq ft of floor
I mixed the whole batch of grout for the floor at once
is that to much at one time?

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Old 03-24-2019, 02:32 PM   #16
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Re: Poor Grout??


I'd definitely regrout the areas of cracked and missing grout.
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Old 03-24-2019, 02:35 PM   #17
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Re: Poor Grout??


that's the plan, just wanted to see what I should do differently so it hopefully would not happen again

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Old 03-24-2019, 02:36 PM   #18
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Re: Poor Grout??


Quote:
Originally Posted by Donohue Const View Post
It's about 250 sq ft of floor
I mixed the whole batch of grout for the floor at once
is that to much at one time?

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It depends on temp and how fast you are and the complexity if the install. Sometimes tight areas take a long time. As a first timer, I wouldn't expect you to get it all done on a single mix. I wouldn't expect me to do it either, depending on the temp.
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Old 03-24-2019, 02:44 PM   #19
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Re: Poor Grout??


Mix by instructions, and just do those areas.

My best guess us you mixed too big of a batch for what you could install before it started to set.
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Old 03-24-2019, 02:51 PM   #20
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Re: Poor Grout??


that's kinda what I'm thinking, mixed more then I could get down fast enough. then it got to dry to get tin the joint and stick well
I'll give it a try again in those two spots
thanks guys!!

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