First patio tiling job!!!

[hamish1966]

Hi folks,
Im an indoor tiler but my mate has asked me if I can tile his patio:yikes:. Its about 10m x 3m and has a concrete surface, trouble is its badly cracked, have attached a pic for info. The surface looks to be about 3" thick and apart from the cracks seems sound enough. Can anyone advise me on surface prep. Do I screed it, creating appropriate falls, add a decoupling layer and tile on top of that or do I need to dig up the old concrete and put down a new layer several inches thick. Also being 10m long and in a sunny aspect will I need expansion gaps? Im really keen to get something new on my portfolio and all advice would be appreciated
Ta,
Hamish

 

[DHTiling]

You have plenty time to suss it out.. Toooo cold to tile ouside yet..

 

[White Room]

Tile with what.

 

[doug boardley]

no way I'd tile that, looks far too unstable.

 

[nybor62]

you cant tile onto that ,

 

[Gazzer]

Nope far too bad.....some serious issues there.

 

[Aston]

imho hamish, i wouldnt tile on that concrete slab....to many fractures in it. if you screed over that and then tile, it will simply crack again!!

needs breaking up and starting again imo..150mm of compressed hardcore, 100mm of concrete with preferably some reinforcement bar in it and an expansion joint.

 

[hamish1966]

Thanks guys, that was what I feared!!! Oh well, prefer being inside anyway with my cup of tea and radio!!!