Advice, losing faith in tiles..

[Richard Nessbert]

I'll try and lift more tiles tomorrow and take photos, it does seem that the adhesive has stuck solid to parts of the floor just not the hallway. Mapei came. Out about 6 years ago, I remember them saying that it was still a relative unkown and maybe concentrated to much on thr UFH rather than screen. I remember it was deff a Flexible Mapei Adhesive.

 

[Flintstone]

Mapei don't make a gypsum adhesive to my knowledge so the priming methods would have been critical.

 

[Richard Nessbert]

OK, feel like I getting somwhere thanks all.
I have 2 tilers who are taking a look next week, both have talked about sanding, priming and Gypsom based adhesive

 

[GoneGuy]

@Richard Nessbert im based in caerphilly, I won’t be able to get you and look at the floor until later in the week/weekend.
Let me know if you would like me to pop down

 

[Richard Nessbert]

Thanks @Adey1980, I, ll message you Wednesday to arrange somthing

 

[Cranbrook]

Just to add, sanding that screen now this far on will be a task it will be as immensely hard. I have sanded one recently that had been down years and even my diamond grinder barely touched it

It can be done, but the only machine that does it isn't cheap to hire, but you only need it for a day so it isn't too bad.. To the OP, private message me and I'll see if I can help, I'm not too far from Newport

 

[Cranbrook]

Ah sorry @Adey1980 if you're going mate happy days no need for me

 

[GoneGuy]

Ah sorry @Adey1980 if you're going mate happy days no need for me

No it’s fine mate, I’m really busy so if your able to look at the job go for it

 

[Cranbrook]

No it’s fine mate, I’m really busy so if your able to look at the job go for it

Haha and me mate!

 

[Cranbrook]

Yeah, we ordered a Porcelain tile, they are a board shape approx 1m long and 20cm width. Made in Spain.. That's about all I know about them. The supplier said 100% suitable for UFH.

How can I ensure the tiler removes the laitance.. Honestly I've had 5 tilers here now and not one has mentioned sanding the floor.

Is the sanding somthing I could do?

Whos the new supplier out of interest?

 

[Richard Nessbert]

Sorry I guess when I said supplier, I meant retailer. I've ordered them from a place called Laporsa in Cwmbran South Wales

 

[One Day]

I think Alan Jackson would agree with me saying that if the laitence is old and baked on fast, ie not friable (loose and flaky) then there is zero point in grinding it off and exposing the very absorbant screed body.
It would just need a sand with 60grit for keying, vacuuming and priming.

 

[Cranbrook]

Sorry I guess when I said supplier, I meant retailer. I've ordered them from a place called Laporsa in Cwmbran South Wales

Your new tiles are saloni in that case, I would bet my life on it ha

 

[Cranbrook]

I think Alan Jackson would agree with me saying that if the laitence is old and baked on fast, ie not friable (loose and flaky) then there is zero point in grinding it off and exposing the very absorbant screed body.
It would just need a sand with 60grit for keying, vacuuming and priming.

I had a massive job last month where the screed had been down for over a year and was rock solid, came up great with an excellent machine I managed to hire

 

[Richard Nessbert]

Hi all,

If a tiling was suggesting just using D Mat Decoupling mat, without sanding and bonding the floor would this be correct?