Cost of laying polished procelain tiles

[jimbo76]

Can someone please tell me the approx cost of laying both 400x400 ceramic floor tiles and 400x400 polished porcelain floor tiles. I have also been told that for the porcelain tiles that you need to use an underlay. Is this true?

Thanks for your help
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[Porker]

I've just had 400 x 400 porcelain tiles laid. I supplied tiles and adhesive £20/m for 20 metres. They were layed on a self levelled floor on Mapei Adesilex P10. Don't know what the underlay thing is about. Also I think polished porcelain may need to be sealed as the polishing reveals tiny pores which can stain. I understand the unpolished don't need sealing.

 

[warehouseman]

Ordinary ceramic tiles are normally cheaper to lay in terms of materials.
If laying on concrete, you an use ordinary fastset. If on wood, use flexible fastset. Only thing with ceramic is that it chips easier than porcelain. Also porcelain is very similar all the way through the tile so is less noticeable if damaged.
Polished porcelain needs a flexible adhesive come what may - more expensive. As mentioned before, it is very sensible to seal the tiles before grouting. Use a standard impregnator.