holes and cracks in grout about 48 hours after being layed.

[marcie]

Hi,

We layed our tile and grouted with a product called Mapai. Now the grout has cracks and holes. Can we filled them with the same grout or does the whole job need to be redone.

 

[grumpygrouter]

Which particular Mapei grout and how did you mix/apply it?

 

[sWe]

Sounds to me like you mixed with too much water and at a too high RPM. Like, waaay too much water and a WAY to high RPM.

 

[Andy Tiler]

hi marcie it sounds like youve mixed the grout to thin and wiped it off to quick did you follow the instructions on the packet?? rake it out and start again😳

 

[marcie]

Hi, I used the pre mixed grout.

 

[grumpygrouter]

Hi, I used the pre mixed grout.

Pre mixed? Do Mapei do one?

 

[grumpygrouter]

You haven't grouted with adhesive by mistake have you?

 

[LM Ceramics]

You haven't grouted with adhesive by mistake have you?

that could be a possibilty russ or like the other posts have said maybe not mixed to the right consistancy

 

[marcie]

It was the pre mixed. The man that put the tile down is a professional. He did some other rooms at my house and they look great. But for the bath I bought a different kind of grout that we had never used.

The holes aren't everywhere. Do you think he could just rake out the seams that need to be repaired and leave the rest alone?

 

[davy_G]

Mmm, dont like the sound of pre-mixed grout!

You sure it was Mapei?
First thought was grout too wet as already suggested but pre-mixed opens a new can of worms.

Was it a floor or walls, what where they made of? Was it flexible addy used?

 

[DHTiling]

As far as i know Mapei don't do a pre-mixed grout......unless it's epoxy.....have you got a name for it please..?

 

[grumpygrouter]

It was the pre mixed. The man that put the tile down is a professional. He did some other rooms at my house and they look great. But for the bath I bought a different kind of grout that we had never used.

The holes aren't everywhere. Do you think he could just rake out the seams that need to be repaired and leave the rest alone?

I wasn't aware that makei made a pre-mixed grout. Would you have a product name?

 

[enduro]

I use Mapei grout a lot on natural stone, and some of there range you have to mix and grout exacally a they say especially ultracolur plus, takes a bit of getting used too.

 

[marcie]

Mapei Premixed Grout is what is says on the bucket. Thanks!

 

[grumpygrouter]

In that case, Marcie, I am unfamilier with the product. It is a new one on me. Does it give any usage instructions which might give a clue as to what has gone wrong?

 

[grumpygrouter]

Are you based in the USA Marcie?

 

[Gazzer]

This would be the product then ?
Mapei Premixed Grout review by goodmand, consumer reports & videos

 

[DHTiling]

Thats the only one i could find neale.....

 

[DHTiling]

Marcie........try posting your question here....>>> Ceramic Tile Advice Forums - John Bridge Ceramic Tile - Powered by vBulletin


they will be upto date with that product.....

 

[Andy Tiler]

marcie if u can rake out the bad parts and re grout where needed.if u are happy with that. then ok.but if youve not applied youre grout properly then it wont do the job its intended to do.i just think youve wiped it off to soon
but why didnt the tiler finish the job and why did u get a diffrent grout for the bath:dizzy2:

 

[James Spelrem]

There are two possibe reasons for this to happen the one you hope for is shinkage of the grought caused by too much water in the mix. the other is movement in the floor caused by substraight how big are the tile what notched trowel did you use mortar or polymere mortor what did you put it over

 

[marcie]

Thanks everyone for your help. The tiles are 12 inches. I am not sure what size of trowel he used or the morter.
Since he has done the other tile in the house I know he was careful. I deciced to buy this type of grout because the other place was closed.

I hate to see him redo the whole bathroom. What is the risk of raking out the grout where it is cracked and filling only those areas? Or am I asking for problems down the road.

I am located in the U.S.

 

[cornish_crofter]

OK so it's a premixed grout.

Thinking laterally:

1) The grout may have been wiped off using too much water. Even with premixed, you can over water. Excess water will displace some of the grout.

2) More likely IMO, the grout may not have been applied with enough pressure. You need to make sure the grout lines are filled with grout. It's easy to wipe over the tiles with a squeegie without actually filling the grout lines, I've done it myself.

Premixed grouts tend not to be used by the regulars here. The reason is that as well as being expensive they don't give consistent results. I used to use premixed on wall tiles but always had to go over the area twice, as the first application gave the appearance of a crack in the grout running down the middle of the grout line. I suspect this was actually shrinkage whilst drying. This could be another problem you have.

 

[marcie]

Thanks for your input. The man that put the tile down mentioned shrinking.

Marcie

 

[James Spelrem]

if the grought is soft where you can scratch it out with your finger nail it is the grought my real concern is what did the tile go over plywood over 5/8. osb 7/8 substaight is code for alberta. Did he use something else like partical board did he go over exsisting if he did what was there? is this on wood or concrete.there is no real way to identefy the problem without more information.My fear is you have movement in your your floor a solid sub straight is critical in any tile installation movement cannot exceed 2% without a tilematting like detramat by scluter even then 5% is pushing it.

 

[Alberta Stone]

typical Alberta floor is 3/4 main deck with minimum 3/8 subfloor over that.
1/2 is better.
So you get 1 & 1/8 overall thickness, which is according to code.

 

[jag000]

any chance you are grouting tiles that have UFH underneath? if so then the grout could crack if it isnt flexible, but i could be wrong

 

[Colour Republic]

This would be the product then ?
Mapei Premixed Grout review by goodmand, consumer reports & videos

:ban:I may have just lost the will to live after watching that review

 

[White Room]

Would you buy this product off this man:yikes:

 

[Alberta Stone]

Originally Posted by Sir Ramic

This would be the product then ?
Mapei Premixed Grout review by goodmand, consumer reports & videos

UGH😛rrr:

Not a good review.

Now here is a good salesman:
slapchopcommercial - Google Videos

 

[Colour Republic]

UGH😛rrr:

Not a good review.

Now here is a good salesman:
slapchopcommercial - Google Videos

I prefer the re-mix


Slap Chop Dance Remix "You're Gonna Love My Nuts" - Video