mosaic over concrete patio - large project
I am planning to mosaic over my covered porch and the adjoining outdoor patio (about 380 sq ft). There are some cracks in the concrete. Should I repair the concrete first before beginning the project? If yes, do I pour self-leveling concrete over the whole thing or can I use that filler in a squeeze bottle, since the cracks are still below 1/4 inch wide?
Also, do I wait until all tesserae are in place before I grout? Or do I work in sections?
Finally, the patio area is slighly sloping. I will be using ceramic tiles. Any suggestions on how to make the surface as non-slippery as possible? I am considering mixing my materials so I'm using some ceramic & some stone tile to help create traction, but don't know if I'll find stone tile thin enough, plus, not so sure how it'll look.
If anyone has experience with this kind of project, please advise.