This is my first time ever posting something, so I hope I am doing this alright. Here is my situation. I have a concrete patio with several (12) various sized slabs. They are well over 20 years old. The expansion joints are 1 inch and some still have the rotting wood in them. One slab has a crack. I bought slate tile about 5 years ago and want to lay it myself but can't get a straight answer on if I can fill the joints with concrete and then just tile without worrying about how the tile is placed across the joint.
Also, is pressure washing good enough before laying the slate or does other prep need to take place.
As of 8/22/15, I have watched/ tried to research what I should do with the expansion joints and have put in backer rod in all the joints. I am still not sure if I can cover the expansion joints with the slate tile I plan on installing. Any ideas?