Hi I have put in some of my windows with a tolerance around the frame.  I have been looking on the internet but not sure how to fill this gape now.   This is a timber frame house and the windows have fire stops around them.    Is there a flashing kit or tape for the outside I can use Should I just use expandable foam and sealants to the breather membrane    With water Ingres and air tightness what is the correct way to do this