I am remodeling a bathroom and have done demo down to bare studs. I am going to tile the bath tub (with shower) up to about 6 ft, and one wall will have tile up the wall 4 ft high. I am planning on using backer board behind the tile in the bath area, and as underlayment on the floor, but I am unsure of two things:
Should I run backer board behind tile that is on a normal wall? The wall with the toilet and vanity will have tile 4 ft high, but this won't be a wet area generally. Is greenrock acceptable here?
How do I transition from backer board to greenrock? Should the tile overlap onto the greenrock in the not-wet areas? And around the shower? Or should the backer stick out past the tile and get taped and bedded like sheetrock?