Tiles loose

[Martyn Leeds]

Clearly we don't have much experience in different substrate prep, concretes/screeds, or perhaps even different ufh systems etc?

If the customer was capable, I'm sure he would've tiled it himself - but he chose to pay a Pro, and unfortunately you didn't bother to ask what the substrate was or indeed even do any research on the internet first?

Good luck with it.

 

[Time's Ran Out]

This tiling game is easy!

 

[Andy Allen]

Just to confirm I didn't know when the screed was layed the customer told me it was ready to tile. We only found out that it didn't have long enough drying time when the screed people told us 1mm a day to dry after they became loose.

If all you want to do is turn up to a job and tile then maybe working for someone may be more suitable for you.
If you take a job on for yourself then imo you should know all about different substrates and drying times.

 

[Dave]

It is a type of screed that leaves laitence on the surface even when primed twice with neat primer. It is like I very fine layer which sits on top of the screed. This is why the tiles have not stuck to and is another reason for them becoming loose.

1 : It is a Tilers job to determine what type of screed it is .

2 : It is a Tilers job to ask if the screed is heated and whether the heating and screed have been commissioned .

3 : It is a Tilers job to to determine if the screed (anhydrite in this case ) is low laitence etc and how much sanding it requires .

You as a tiler are the one that advises the customer on the preparation of the screed from sanding to priming etc depending on adhesive choice , these being cement or maybe gypsum based.

You also should be determining whether the screed is dry enough ( 75%RH ) for tiling to commence... These are just the most common procedures you as a tiler should be doing and checking.

 

[On one]

1 : It is a Tilers job to determine what type of screed it is .

2 : It is a Tilers job to ask if the screed is heated and whether the heating and screed have been commissioned .

3 : It is a Tilers job to to determine if the screed (anhydrite in this case ) is low laitence etc and how much sanding it requires .

You as a tiler are the one that advises the customer on the preparation of the screed from sanding to priming etc depending on adhesive choice , these being cement or maybe gypsum based.

You also should be determining whether the screed is dry enough ( 75%RH ) for tiling to commence... These are just the most common procedures you as a tiler should be doing and checking.

Harsh,but true.

 

[Dave]

Harsh,but true.

it wasn't typed to be harsh .. Just stating what a tiler should be Looking/checking and advising etc.

 

[Just Rizzle]

sorry to say tiptop its all down to u . your the pro you should of asked questions rang the supplier of the screed talked to there tech people. y didnt u use a decoupling membrain standard practice for me to mat new screed. if the customer dosnt want to mat the job my decission is easy I DONT DO IT. i let some like u have a go youve obviously learnt a very expensive lesscon

 

[Stef]

I would disagree with the mat on the screed Ray, I've tiled a few anhydrite screeds & never had an issue as I use AnhyFix.
Each to their own spec though not faulting the way you do it.
I agree with everything else stated though, it's a harsh lesson for tip top.
Even sticking Ditra down wouldn't have helped in this instance as the laitance hasn't been removed..

 

[Simons70]

I still not understand how the tiles lose!Some pictures?

 

[Stef]

I still not understand how the tiles lose!Some pictures?

The adhesive is only stuck to the top friable layer of the screed, the laitance.
This had to be removed or the floor will fail just like this 100%.