Do I need to seal a concrete floor ?

[10051550]

Right, after much bashing all my old quarry tiles are up including the adhesive and the kitchen floor has only minor imperfections

Question is do I need to seal the floor before laying porcelain tiles with Keraflex Maxi ?

 

[mac391]

Sorry never heard of keraflex maxi !! sounds like a flexible tile adhesive (which you definately do not need on a solid subfloor) A standard adhsive is required.
I gather your subfloor is solid ?
The type of adhesive required is always dependant on the subfloor, tell us that and you might get the right info...

 

[10051550]

The Kitchen floor is concrete, I've removed quarry tiles that have been down about 20 years ..

 

[mac391]

So long as the floor is level you should be fine to tile straight on top. The advice these days is to put a DPM (damp proof membrane) down to stop excessie moisture getting to the floor but it's expensive and your adhesive might not stick to it so you might need a screed aswell.

If your old tiles were down twenty years your new ones should be fine.

 

[10051550]

thanks for that