Concrete slab as finished floor

[vanillathriller]

Hi all, I'm doing some work to my barn - including a small kitchen extension. Current spec is 100mm hardcore, 50mm sand blinding, DPM, 85mm celotex, 100mm concrete slab, DPM, 75mm screed.

I've done a few concrete pads in my time and am very happy with the finish I get bull floating, there is nothing to be hidden in the screed so my question is, can I do away with the screed and just have the slab as my finished floor to tile over? Will obviously save me a lot in time and materials.

Thanks in advance!

 

[Deluks]

No underfloor heating? Really? Not even to 'future proof'?

Even then you could put the pipes in the middle of the slab, and float. Or skim it over with self levelling.
I can confirm that tiling over a basic floated slab takes twice as long as over a well laid screed. Well it did me!

Any depth saved on the screed should be seen as an opportunity to increase the insulation

 

[jeds]

Your spec is slightly unusual. Floors are normally specified as insulation over slab - which requires a screed - or insulation under slab - which does not. Sometimes a screed is used to make up levels and produce a clean flat surface. But in that case it would normally be a thinner bonded screed - 30mm or something like that. The question is; why would anyone add a 75mm screed directly onto a concrete slab? It's unnecessary.

 

[ban-all-sheds]

can I do away with the screed and just have the slab as my finished floor to tile over?

You could just have concrete and no tiles.

 

[tony1851]

Why put two dpms in?