Screed - Tile Advice

[Stef]

pricing up a job, customer stated that it's a concrete floor & very flat.
I took the kickers off in the kitchen & im more than certain it's a gypsum screed or top coat.
What do you guys think?
It had been tiled previously 10 years they were down without issue but customer says that they came up with a fair bit of effort & there was very little adhesive left on substrate.

 

[Chalker]

How old is the house Steff ?

 

[Stef]

17yrs it's been built.
House builder went out the game years ago & can't get any info on the floor.

 

[hmtiling]

UFH? if not core drill a bit

 

[Chalker]

Not sure if gypsum screed was around 17 years ago?

 

[LM]

Best probably to treat it like it is an anhydrate floor just to be on the safe side.

 

[Stef]

I remember talking to Alan (Ajax) & I'm certain they were brought into the uk about 25yrs ago.
It certainly looked like a gypsum from what I could see of it but just wanted to double check.

 

[John Benton]

Looks pinky and dusty to me Stef

 

[LM]

Nothing a sand, Hoover and a couple of coats of primer won't sort out

 

[Just Rizzle]

core bit a piece out if there's sand in it its sand and cement if its gypsum based it will have a smooth look and be whiter in colour

 

[hmtiling]

core bit a piece out if there's sand in it its sand and cement if its gypsum based it will have a smooth look and be whiter in colour

Yeah, good idea

 

[White Room]

Might even be a slc on top of the the screed ?

 

[Stef]

Might even be a slc on top of the the screed ?

That's what I was thinking..

 

[Time's Ran Out]

Yeah, good idea

Now why didn't you think of that!

 

[Andy Allen]

Could be latex that was mixed with to much water which produced a surface laitance which is why the tiles came up leaving very little adhesive on the substrate..