I'm planning on building a built-in window seat against a wall that has two windows with sills and an apron that extends from the wall about 3/4" to 1":
What's the best strategy for removing this extended part of the sill so that we can build flush against the wall?
Figure we have the following options:
- Replace with new sill
- Cut existing sill flush with wall
- Build on top of or around existing protrusion
Doing #2 would clearly be the easiest but I'm concerned about any draftiness and sealing it back up right. I'd prefer not to do #3 as it would affect the height of the seat by a few inches.
Any suggestions are appreciated.
For reference, here are our renderings of the intended unit: