Moisture & Efflorescence Coming Through Grout

[MW Smith Ceramics]

It seems you lifted the tiles that looked worse first and they are around the rad, if you find a leak it will look better on you.
Seen tiles on a kitchen floor crack and sink, that was down to a pin holed copper pipe.

Crikey!......well I'll know more tomorrow if the there is more moisture there......

 

[MW Smith Ceramics]

That's the process I use for vinyl, you'd have to check the spec of the dpm to see if tile adhesive can be applied direct to it or if it needs a coat of NA first. I'm not familiar with TM products either so you'd have to check if it's suitable for use under a dpm.

This could be an option Peter.....anything to add ??

View: http://youtu.be/v7eCBNrLvjc

 

[MW Smith Ceramics]

Hi all, I've had to come to the arms now to get a definitive solution to a problem I'm having with a floor I laid a year ago, feedback would really be appreciated as I need to get this sorted and put it to bed......so here we go details as follows.........it's abit long sorry!

Okay so I removed some 20mm thick quarry tiles from a hallway in a 1930,s property exactly 12 months ago as a lot of them were loose and debonding, so removed the tiles easily enough, just a few areas of sand & cement came away in patches so I used ardex a46 to repair, the floor was abit lower than I wanted so used TM Levelflex to make good up to 25mm in places so I could just solid bed fix new 300 x 300 porcelain........tiled floor using TM rapid flex and got the level perfect to existing rooms off the hallway.......had a phone call just before xmas from the client 8 months later saying some of the grout joints were moist and there was a white substance sitting on the grout - (effloressence ) grout used was butch from Porcelanosa.....so I went out and floor is solid no debonding/ grout cracking but some of the grout joints had darkened and seemed wet & effloressence on alot but not all areas.......so I removed with LTP grout stain remover - ( come up lovely ) but 3 weeks later had a call from client with the same problem......so after speaking with different technical advisors ardex, Bal , Mapei etc they are basically talking about using a liquid DPM.......as long as it's suitable to use on TM Levelflex......if not ardex have suggested laying Schluter 25 with a moisture tolerant adhesive like ardex X7 so spoke to Schluter said it may work but couldn't guarantee it..........

Oh also there was no DPM underneath the sand & cement on areas I patched up but they didn't have them back then after talking to various advisors the cause could be the fact that thick porous quarry's that were originally there were accommodating any moisture and then it was release elsewhere but now they have been removed and porcelain laid ( non porous ) with any moisture having nowhere to go but up through the grout??......I'm abit lost on this one to cause and solution.....


Any feedback would be really appreciated, I'm taking the floor up today and will know more then.......what would you guys suggest here?

Many thanks

Mark

So this was the prep completed before tiling again.........I latexed over the old latex with arditex na then used ardex dpm 1cr ( expensive stuff!......then ardex P4 then Schluter ditra 25 with kerdicoll......pictures attached......think it will be a miracle if any moisture comes through the grout joints now!!!!

 

[MW Smith Ceramics]

now I have a happy and hopefully that will be the last I hear of that issue...

So this was the prep completed before tiling again.........I latexed over the old latex with arditex na then used ardex dpm 1cr ( expensive stuff!......then ardex P4 then Schluter ditra 25 with kerdicoll......pictures attached......think it will be a miracle if any moisture comes through the grout joints now!!!!

View attachment 81508 View attachment 81509 View attachment 81510 View attachment 81511

pe

 

[MW Smith Ceramics]

Happy client.....DOH!