Slate patio repair

[SteveBowles]

Dear Forum,

I am trying to work out what is the best way forward with repairing a not-very-well done patio. The patio is made of slate (roof) tiles - 30x40cm - on concrete. the problem is that the tiles keep coming up as they are not really heavy enough to make a good patio surface. I have started replacing a few tiles but have to dig out the concrete underneath. In doing so I disturb the adjacent tiles and so the job escalates. In an ideal world I should probably start from scratch with something better than slate roof tiles but life is too short as the patio is quite a large area. I was wondering whether there was some kind of adhesive/mastic that I could use to just 're-stick' the tiles as they come up. Any suggestions please? Steve

 

[White Room]

Could try some single part flexible tile adhesive.....

 

[On one]

Could it be that the roofing slates are delaminating,if so it is unlikely anything will stick to them long term

 

[SteveBowles]

Thanks for suggestions/comments guys - very helpful. The slates are definitely not delaminating though - it is just a question of their being rather too light-weight for the job they are supposed to do.

 

[White Room]

If you do stick them down they need 100% coverage...

 

[DHTiling]

The thickness is not an issue , but it is probs the initial fixing method used..?.. if fixed correctly then they would be fine ..