About six months back Ardex did a training session here in Vancouver. Well actually it was in Burnaby and during the training class they showcased the fact that Ardex 8+9 can be used over tile as a prep stage for a tile over tile installation.
Last week at Fontile I noticed handouts from Mapei promoting the use of their product called Prim-Grib.
I have used both of these products but never for a tile over tile job. Having worked with both I'd put my money on the Ardex product.
Has anyone done this approach before? Tile over tile?
Looking online for all the options in this sector I found this image from a UK site.
Imagine Source: Picture - Page
I remember something about retiling over very non-pourous substrates. I think it is that green primer is the stuff you need. I still have loads of tile to test and I did include tile over tile with either the Ardex 8+9 approach or the use of Green Skin. I have found Green Skin to be total and under crap and personally will use it for crafts and bond breakers in the future.