Hi, going to be doing complete bathroom soon. I've had various quotes for various jobs. When it came to tiling, the guy told me that he would board the whole bathroom and tile on top. As money is tight I thought I could aave myself a few quid and board it myself. I am aware that I should use MR board as a minimum. However I have two small windows 610 x 1000. Should I board inside the window, the walls are fine in this area. It's no extra effort to do this but not sure if necessary. Also back wall is completely fine as mentioned by tiler so reluctant to do this if it's not really needed. The tiler was going to dab and dot, I've no experience of this so was going to screw directly to wall or batons and spacers where required. Any advice appreciated.