Drying time - Limestone tiles

[White Room]

A week for bonding and finish could have done with a bit more drying time, could be the moisture from the plaster trying to dry out through the surface as well.
Should have back skimmed the tiles as well, not dot and dab though

 

[doug boardley]

5 spot dot and dab, gypsum basecoat and skim,large format stone, don't want to put a downer on you Kev, but it doesn't bode well for an enduring job imo, the stains showing through make me think that a dispersion adhesive was used, and if so, I'd have said that was the problem, but I'm stumped now as you say you used a bagged addy:20:

 

[DHTiling]

Not condoning the fixing method at all...but the damp is just moisture in the stone from the adhesive..keraflex maxi is a slow setting adhesive compared to kerquick etc and will lose moisture into the stone and will dry but my concern is the fixing method and substrate...

 

[wetdec]

Kereflex maxi dries by chemical reaction. Unless it is very cold it should have been dry the next day. You sure it is from the adhesive?

Powdered hydraulic adhesives may cure by chemical reaction but it doesnt remove all the water.

You put water in then it has to come out either through the backround, grout gaps or the tile.


The limestone will dry in its own time tho using a dehumidifier may help you out slightly....................

..

 

[grumpygrouter]

Powdered hydraulic adhesives may cure by chemical reaction but it doesnt remove all the water.

You put water in then it has to come out either through the backround, grout gaps or the tile.


The limestone will dry in its own time tho using a dehumidifier may help you out slightly....................

..

I agree Tony but a large proportion of the water used will be consumed and locked in as part of the chemical reaction.

 

[djr tiling]

sorry if this sounds like a stupid question but why would dot and dabbing show through the tile more than a troweled wall? not saying any way is right or wrong i prefer to trowel a wall only but have found myself in a position where i had to dot and dab as i suspect most have

and dont know if its been asked but was it grouted to early sealing moisture behind the tiles ??

 

[DHTiling]

sorry if this sounds like a stupid question but why would dot and dabbing show through the tile more than a troweled wall? not saying any way is right or wrong i prefer to trowel a wall only but have found myself in a position where i had to dot and dab as i suspect most have

and dont know if its been asked but was it grouted to early sealing moisture behind the tiles ??

Because when you fix stone it is common practise to back skim the tiles and then any moisture shading is uniform..so when the a tile is dot and dabbed the moisture in concentrated to that area and shows through on light stones....And dot and dabbing isn't a good fixing method...

 

[djr tiling]

thats why i like this forum so much ive been tiling now for 17 years but am still learning
and i know dot and dab is a bad method and stay well clear as much as possible the times i have used it was mainly on tiles 900 + long and on crap walls witch some people will not take your advice and get them sorted prior to tiling :mad2:

and have you never done it dave ??

 

[DHTiling]

Bedding tiles out to over come bad walls is different to spot fixing...i have had to bed tiles out and still do on some jobs but keeping the bed as complete as possible but not spot fixing.

 

[djr tiling]

Bedding tiles out to over come bad walls is different to spot fixing...i have had to bed tiles out and still do on some jobs but keeping the bed as complete as possible but not spot fixing.

exactly what i have done leaving as few voids as possible so i can take back what i said earlier I'm not guilty of using the dot and dab method

phew!!! thought i had done some bad practise tiling and now i think about it everyone means with dot and dab only witch i have seen done and it was not pretty when the people had started drilling to hang things in there bathroom there was tiles with corners missing and worse

 

[Kev50]

I can confirm that dot and dab on a porous tile like limestone is not a good idea...

one week in and the tiles are still showing moisture marks - have resorted to de-humidifier now!

Kev

 

[grumpygrouter]

I can confirm that dot and dab on a porous tile like limestone is not a good idea...

one week in and the tiles are still showing moisture marks - have resorted to de-humidifier now!

Kev

Dot n Dab on any tiles is not a good idea!!

 

[smurf21]

spreading the wall and backskimming the stones and having to bed out isnt the same as dot and dabbing imo dot and dab is 5 dollops of addy on the back of a tile slapped against the wall or floor and then left for us all to look at on this forum at a later date..lol

 

[jonnyc]

I have found that stone fixed with flexible adhesive and not rapid set lets the polymer content work its way through the stone to surface along with the water in adhesive.
the water evaporates and leaves a slighlty furry residue on top of tile and replicates the dabs on underside of tile or whatever bed underneath.
You may think that the adhesive is still wet but it should have dried through within approx one week on average limestone.
the result looks terrible but is usually easy to remove with a soap based claener like wexa.
I have had to remove these marks numerous times in my restoration business but equally have had to clean stone i have solid bedded thathas taken on a mottled look.
you do not get this problem with rapid set that pulls the moisture within itself.
15 years ago the polymers in some very well known brands of adhesive were almost impossiblle to remove from moleanos or similar but the adhesive manufacturers have learnt from this and much easier nowasdays.

 

[jonnyc]

should have added that all stone should really be solid bedded and i always back tile and substrate with adhesive before applying whatever bed. if you lay loads of dabs it is ok provided that when setting stone it is always solid bedded when you have finished fixing each piece and substrete will hold weight