Tile flexable wall, can it be done?

I just remodeled a bathroom and I installed a pocket door. I was planning on tiling the dry wall up 42 inches from the floor all the way around the bathroom, but I'm worried that the dry wall along where the pocket door is, it is not as solid as I would want it.
I mean the wall seems pretty strong but it's not like there is 2x4 behind it, I'm afaird if I tile it and if someone leans on it all the grout will crack, is this the case or an I worried about nothing.

What do I need to do? I really want the tile work done. I was thinking maybe they sell some thing that would make the grout more flexable , or maybe use those super tiny spacers when laying the tile so there will not be that much grout to deal with. Any suggestions?

 

with the movement you will eventually have problems.At the joints where the wall meets the floor you can caulk and that will help the problem for awhile.you can also use epoxy grout in the wall instead of reular grout,is this regular 4 1/4 wall tile?If so then you will not need spacers as they already have little lugs on them for that purpose

 

Thanks for the info, I will look into that epoxy grout for sure. As far as the joints go, there will be a base board heater running along that wall so if does crack I will never see it. But I do have another question, I'm using rectangle tiles on the wall , I think they are 4x8. Will the way I install them effect the strenth of the wall.I never really thought about this untile just this moment. How should I install a rectangle tile on the wall. Should I go put the tile on the wall like a brick house or should the tile be layed perfect one on top of another?

 

you could remove the drywall and replace it with plywood in the "soft" areas