Floor Tiles on a new concrete floor.

[scottwilko]

Hi there,
Looking for some advice as I am getting various opinions. I have a new insulated & damp proofed concrete floor which I intend to tile with porcelain tiles (approx 5mm thick). The surface is a concrete slab 6" thick which has dried out (poured 4 months ago) I haven't screeded or self leveled as yet.

My query is what is the best way to prepare this uneven surface. Do I self level then lay tiles using flexi grout. Do I lay ply as you would on a first floor to make a some surface.

Any help would be useful

Thanks

 

[peteablard]

No point in laying ply on there, just self level and tile. is there under floor heating going down?

 

[Stewart]

Is there any underfloor heating....?

 

[scottwilko]

No, its a warm slab build up. Dpm, insulation, reinforced conc. The top surface is uneven but was suggested just to add extra grout rather than screed or self leveling.

 

[Stewart]

I would level the uneven concrete floor with an slc, this will make tiling much easier to achieve a quality finish, rather than trying to level as you go with adhesive.......


Created on iPhone.....

 

[Mike]

No, its a warm slab build up. Dpm, insulation, reinforced conc. The top surface is uneven but was suggested just to add extra grout rather than screed or self leveling.

i think you mean adhesive. you're best to level it first using slc for a better finish

 

[Stewart]

i think you mean adhesive. you're best to level it first using slc for a better finish

You back to one finger Mike...?


Created on iPhone.....

 

[kilty55]

hi i would self level then tile...using adhesive not grout

have you tiled before

 

[DHTiling]

Hello and welcome.

 

[Mike]

You back to one finger Mike...?


Created on iPhone.....

yeah , still got a bad cut on my best finger... accident with a stanley :mad2:

 

[White Room]

Hi and welcome..

 

[Ian]

Welcome along to TF

 

[Michael kiss]

:welcome::welcome:

 

[scottwilko]

Hi, yes have tiled many years ago but I haven't tiled a floor before. Would normally get a pro in but I am renovating a house from top to bottom so the budget is tight. Self leveling was my first thought. Will probably use flexi grout to reduce risk of cracking. Doing 5m x 3m. 30cm tiles. Presuming I don't need anything like ditramat.

 

[Del W]

Welcome to TF. The floor tiles are 5mm thick ?

 

[scottwilko]

Yeah roughly 5mm maybe a little thicker. Standard floor tiles. Nothing special.

 

[White Room]

5mm thick, you would need 100% coverage under the tiles....

 

[kilty55]

are they the newer superthins?

normal floor tiles are thicker scott

 

[scottwilko]

Just standard cheap floor tiles. Been in storage about 8 months so thickness is a guess. But will need a solid base not dabs.

 

[Ajax123]

A six inch deep new concrete flor has NOT dried out in 4 months. 6 inches will take about 18 months to dry fully. You will need something to controll residual moisture e.g. Ditra matting or a liquid dpm.