We've removed the existing drywall on an uneven wall, along with the trim around a window on this wall.
When we're done making the new wall plumb and even, the window will be more recessed than the new wall.
Here's an image of what I've got:
What are the components that I've marked with a question mark?
I think I should be installing our backer board up to the outline of the rough opening, is that correct?
Will I need to extend out the "?" components and the sub-sill to be flush with the new backer board? If so, can I simply cut pieces of wood to size and nail them onto the existing pieces?
We will be tiling all around this window. The tile is 3/8" thick. Do I need to use thicker trim pieces to account for the thickness of the tile that will be cut around it, to ensure that the trim is proud of the tile? (I am assuming that I should be installing the trim before the tile.)
Should I fill the gap around the window with some kind of sealant or insulation? There doesn't appear to be anything there right now.
I want to use wood for the trim. What type of wood is recommended?