Window installation in wood buck
Just installing outie windows in a new build. The question I have is the air and water sealing method, I have my WRB running inside the sides and bevel sill wrapped in stretch tape. The gap is 3/4 on either side of the the window, which have no flange. I have seen either spray foam the whole gap and depth or backer rod with a silcon ( adhesive). I also seen backer rod on the interior and exterior with nothing in between. At the sill I know not to close it off , but should just put a interior seal some how.
Thanks for any help.