Porcelain tiles onto screed

[JohnnyO]

My patio is currently a patchwork of crazy paving, cement and concrete slabs (see pics below). I’d like to raise and level the floor before laying some outdoor porcelain tiles (pics below). I’ve found a builder specialised in paving who wants to do the job. He says he s going to screed the floor and lay the tiles directly onto it and get the job done in 3/4 days (20sqm). I was expecting a more standard concrete slab and tiling with adhesive.

I would like to receive some comments about:
- screed vs slab for a patio
- laying porcelain tiles directly onto wet screed

I am wondering if the guy I am talking to is cutting corners that are going to cost me later on.

Thanks

 

[hmtiling]

The porcelain won't bond to sand and cement. A slurry mix on the back of the tile will need to be used. I've never fixed monolithicly so hopefully some if the older guys will give some input here
@3_fall
@timeless john
😀

 

[One Day]

Sand and cement will not bond into porcelain.
Builders should not be allowed near tiles or anything tiling related.
Find a good tiler who has experience of external tiling and understands the requirements of drainage etc.

 

[hmtiling]

Sand and cement will not bond into porcelain.
Builders should not be allowed near tiles or anything tiling related.
Find a good tiler who has experience of external tiling and understands the requirements of drainage etc.

Too slow old bean

 

[Waluigi]

Tile adhesive or the pedestal system like ‘Porcel quick’

My local shop (Tilefixdirect) sells the system. It looks pretty good.

 

[Old Mod]

hopefully some if the older guys will give some input here
@3_fall

😀

Thin ice Harold. 😀
‘More experienced’
would’ve been a far less inflammatory remark you know. 🙂

Porcelain needs an additive to bond to a S/Cement bed.
Some of the 20mm porcelain now being marketed for outside areas comes with its own additive, or as Harry suggests, an sbr slurry can be used.
There are a few different ways it can be done, depends on your fixer and what he prefers.
It is possible tho.

 

[Brian the Tile]

When tilers were tilers

 

[Brian the Tile]

Imo if you are doing a job like that get a tiler in not a builder tilers tile and builders should dtick to building

 

[Time's Ran Out]

The porcelain won't bond to sand and cement. A slurry mix on the back of the tile will need to be used. I've never fixed monolithicly so hopefully some if the older guys will give some input here
@3_fall
@timeless john
😀

I feel rather young now!

 

[JohnnyO]

Thanks for all the great answers!
The person I am talking to is actually not a builder but a groundworker. Whatever he does probably works well with paving stones but I guess I should speak to a tiler for porcelain tiles...