The other advantage to using steel studs in these areas is they don t warp or shrink.
How to hide a huge gap between tile and wall.
Tool the caulk by drawing your finger along it to form a concave surface.
Choose a color that matches the countertop and spread a thin continuous bead with no voids.
Lay painter s tape along the edge of the countertop and the wall just above the gap to keep caulk off these surfaces.
I foresee water getting in the gap and seams when cleaning the floor.
Your tile person will take the largest gap and run a tape line using that as the thickness or the caulk.
Fill gaps larger than 1 8 inch.
Great remodelers and builders consider using galvanized steel studs in locations where there will be tile.
This will give you say a perfect 3 8 caulk line with an irregular wall to counter gap.
If you have tile on the wall adjoining the tub select a caulk that matches the color of the grout.
The steel studs are perfectly straight.
If your gap is smaller than 1 8 inch in width use regular caulk.
With the uneven look you may need to shape the molding to fit.
The only thing to cover the gap would be to use 1 4 round molding.