slate bathroom floor - help! - TilersForums.com

[doris4646]

Apologies if this question has been asked before...

We have just had a riven slate floor laid in the bathroom. This was then cleaned using Qep Heavy Duty Tile Cleaner to remove all the marks and grout.

It has now left the tiles white and cloudy and stained, some almost bleached and generally looking a complete mess.

We have washed and washed and scrubbed them - even using a carpet cleaner but nothing changes the appearance.

Is there anything we can do to remove this or cover it up?
When they are wet they look fantastic but as soon as they dry they look awful again.

I really don't want to remove them if possible as this will mean taking out the bath etc etc but its looking like we may have no choice.

Any help/advice gratefully received.

 

[jay]

:welcome:just a question what procedure did you clean the slate and how long was it grouted befor cleaning :8:

 

[doris4646]

As far as I know (a tiler did the inital work) the instructions on the bottle were followed - apply cleaner, leave for 10-15mins, scrub/scourer and then wash, although I do know that the cleaner was used neat towards the end rather than 1 part to 4 parts water as some marks were not moving.

The tiles had been laid/grouted about 3 weeks beforehand, during that time the bathroom had not been used.

The tiles have yet to be sealed - for obvious reasons!!

 

[diamondtiling]

Hi there and welcome to the forum, You need to put some pictures up so that we can see these stains. I do not know the product you mention nor can I find it on the net, is it for ceramics and porcelain, does it say it you can use it on natural stone?
You can get specific products for slate such as Lithofin slate seal, this will immediately darken the slate and enhance colours. Slate should be cleaned of all adhesive marks as it is laid, it also MUST be sealed prior to grouting, was this done? If these marks are cement marks then concrete cleaner may help, try it on a small area first.

 

[mistral]

it also MUST be sealed prior to grouting,

Not necessarily........ I worked on a big slate job with a mate of mine and he insisted on grouting it first and then sealing after thoroughly washing, and the job came out great, surprised me, as I've always sealed first.

 

[david campbell]

Not necessarily........ I worked on a big slate job with a mate of mine and he insisted on grouting it first and then sealing after thoroughly washing, and the job came out great, surprised me, as I've always sealed first.

slate must be sealed before grouting m8!
whoever told you different is wrong!

 

[jay]

sorry to disagree slate is always sealed last over here first id heard of sealing first was on here we all do things diff:8:

 

[Perry]

i also grout limestone before i seal it have done for twenty years also some terrecotta so i have learnt not to knock it before i try :yikes: it

 

[mistral]

i also grout limestone before i seal it have done for twenty years also some terrecotta so i have learnt not to knock it before i try :yikes: it

Brave man!

 

[Perry]

well 20 years ago you never got rapid setting grouts so you would always get the mositure getting into the tile if you sealed it first it would take years to dry