Tiling floor prep

[ash1212002]

We have half floorboards sitting on joists and brick sleeper walls and the other half of the kitchen is concrete which we'll be tiling over

Area to be covered is 3.35 x 6.87 metres

We've had a tiler around to quote for the job who has specificied 6mm plywood to be laid over the floorboards screwed down every 150mm, he has stated no preparation is required on the concrete floor side

Is 6mm plywood acceptable for tiles to be laid over?

 

[bobasd]

you intend to tile over both floor surfaces in the kitchen?
will boarding one side raise it above the other side?
what about the threshold height into the next room?

is there a DPM and insulation under the concrete?

 

[foxhole]

12mm ply minimum. What type of tile ?

 

[ash1212002]

you intend to tile over both floor surfaces in the kitchen?
will boarding one side raise it above the other side?
what about the threshold height into the next room?

is there a DPM and insulation under the concrete?

Yep both floor surfaces will be tiled over, the tiler advised 6mm rather than 12mm plywood as this will only marginally raise the floor which will still allow him to achieve a level floor throughout

I have no idea whether there is a DPM and insulation below the concrete, we've only just recently purchased the house

 

[bobasd]

is the kit a shell - totally empty of base units and appliances and skirtings?
6mm ply can have a tendency to "curl up" when wet with adhesive, and it can pull out the screw fixings.

whats been recommended for the join between the solid and the suspended floor - thats the weakest link in the installation?

no DPM means moisture can seep through the conc.
no DPC means rising damp can occur - but it shouldn't affect the floor.

 

[ash1212002]

is the kit a shell - totally empty of base units and appliances and skirtings?
6mm ply can have a tendency to "curl up" when wet with adhesive, and it can pull out the screw fixings.

whats been recommended for the join between the solid and the suspended floor - thats the weakest link in the installation?

no DPM means moisture can seep through the conc.
no DPC means rising damp can occur - but it shouldn't affect the floor.

The kitchen is totally empty and no skirting, the tiler has suggested the following

SBR bond the 6mm plywood, both sides including the edges
Screw the plywood every 150mm
And use an S1 or S2 adhesive

There is no bounce on the floorboards

Regarding the join between the solid and suspended floor he hasn't suggested anything! But will double check with him

What should he be installing?

 

[foxhole]

6mm hardibacker would be better if you keep it that thin.

 

[ash1212002]

6mm hardibacker would be better if you keep it that thin.

Will 6mm cement board be ok? If so how would this be secured down? Is it screws and glue?

 

[foxhole]

Will 6mm cement board be ok? If so how would this be secured down? Is it screws and glue?

YES

 

[ash1212002]

YES

Can grab adhesive be used to secure the boards? Or does it have to be a specific type of floor tile adhesive?

Do the boards need to be primed with bal sbr bond?

 

[foxhole]

I would use foam adhesive

 

[ash1212002]

I would use foam adhesive

Can you recommend one in particular?

How about priming the boards?

 

[foxhole]

Can you recommend one in particular?

How about priming the boards?

They all work very well, you can prime but floor tiles can't fall off like a wall tile so optional.