i have been watching the tilers next door install a screed on a roof terrace they lay a sand and cement screed on a dry concrete base to get their level,and then tile directly onto it 2 hours later.Now its hard enough to stand on,But surely it should be left to dry.
Has anyone done this method as I have never seen it done and are there any complications afterwards.
never seen it done this way before but i guess it would be no different to laying slabs or bricks into wet concrete. why use another layer of adhesive, provided the tiles bond with the cement in the screed i suppose it makes sense especially as it's exterior.
wall tiles used to be set with a cement mix before tile adhesives came onto the market.
don't know why they left it for two hours though - i'd have thought that this technique would work better if the tiles were laid directly onto fresh screed.