HELP !! Tiling on a fresh chap - cement-water for past dries too fast

[werner]

Re: HELP !! Tiling on a fresh chap - cement-water for past dries too f

The ciment-water contact layer do not drying fast on contact with the tile, but before, when I put it on the chap.

But, wet the chap as solution, I think is stupid, because the chap for tiling (in contrast to beton) we make dry in order that is not curving during drying.

Perhaps there is something wrong how I mix the ciment-water, or I can put mix something into it that it dries more slowly (perhaps sand or sugar ) ? Or which tiler from the old times know what to do here

 

[White Room]

Re: HELP !! Tiling on a fresh chap - cement-water for past dries too f

The ciment-water contact layer do not drying fast on contact with the tile, but before, when I put it on the chap.

But, wet the chap as solution, I think is stupid, because the chap for tiling (in contrast to beton) we make dry in order that is not curving during drying.

Perhaps there is something wrong how I mix the ciment-water, or I can put mix something into it that it dries more slowly (perhaps sand or sugar ) ? Or which tiler from the old times know what to do here

No need to be so rude....

 

[Ian]

Re: HELP !! Tiling on a fresh chap - cement-water for past dries too f

Surely a plasticiser will extend the working time.

 

[Ajax123]

Re: HELP !! Tiling on a fresh chap - cement-water for past dries too f

. It sounds to me like you are not priming your chap (screed). The idea of priming is to reduce the level of suction from the adhesive into the chap. If you do not prime the chap sucks the water from the adhesive paste and it dries very quickly. Use a simple acrylic primer. Beton generally will have a higher moisture content and a less porous surface so will not have the same level of suction. It also sounds like you might be mixing your adhesive on the dry side so maybe have a look at the instructions t make sure you are adding enough water. Don't start putting additives in especially not sugar as this could cause you all sorts of issues.

 

[AliGage]

Re: HELP !! Tiling on a fresh chap - cement-water for past dries too f

Still a little difficult to understand but agree with Ajax. Sounds like your "chap" is ultra porous and sucking any moisture out of your adhesive. The same could be happening when you spread on the tile too. Depending on what the tile is, but that could be drawing in the moisture from the addy too.
Wet the back of the tile and prime the floor to try and avoid this.

 

[werner]

Re: HELP !! Tiling on a fresh chap - cement-water for past dries too f

Thanx for the responses. What is "priming your chap (screed)" , how and with which material one do this ?

And: if I put the ciment-water mixture on the backside of a tile, then happens the same like if I put it on the fresh chap: it dries within 2-3 seconds, no time to put the tile.

As said, the problem is, that the employers or owners don't like to spend money for material. And if then something goes wrong, they give the fault to the workers.


Strange is also, that this happens only sometimes. The water and the ciment is supposed to be the same, so this problem could depend on the proportion of mixing (potentially also on the quality / kind of the sand, but as said it dries on the tile also very fast). This NOT happens if one put a little colle / paste into the ciment-water mixture, however as the owners dont want to buy it, perhaps one can use something cheaper

In old times, people worked only with ciment, sand, water. Anybody has detailed instructions, how they made a fresh chap and tiled that immediately ?

So, if some tiler of the old times, or someone who know this good, can explain me, or if there is anywhere a detailed explanation, I would try this out.


This is in fact a bigger problem for me, as I can tell here ... 🙁

 

[Martyn Leeds]

Re: HELP !! Tiling on a fresh chap - cement-water for past dries too f

If I was having such a big problem, and I knew of an answer to solve it, as you do, and it was effecting my work as much as you say, then I would buy it out of my own pocket. If the employers/owners refuse to pay for whatever the product is... That's unless it comes at a fairly hefty price that would severely effect my ££££'s at the end of the job

 

[Ajax123]

Re: HELP !! Tiling on a fresh chap - cement-water for past dries too f

Werner.. Where are you from and where are you working?

 

[J Sid]

Re: HELP !! Tiling on a fresh chap - cement-water for past dries too f

Sounds like you are tiling the old way. Semi dry screed, plastic ( cement,water, plasticizer as Bri said ) then tile. Done tens of thousands of mt like this went i start as an improved ( apprentice now). So add plasticizer and this will cure the problem.

 

[Gazzer]

Re: HELP !! Tiling on a fresh chap - cement-water for past dries too f

FYI Werner is somewhere around French Guiana.