I am replacing a garden window with a vinyl replacement window (block window with exterior vinyl trim strips are my thought at this point). The exterior is stucco with 2×6 wood exterior trim around window (redundant). The rough opening for the window is 1″ smaller than the trim on the sides and top. This exposes the remnants of the paper flashing. I am going to put some metal flashing under the flashing paper on the top of the opening and was wondering if by sliding some flashing paper between the sides of the rough opening (where there is flashing paper-damaged from pulling out the aluminum nailing fins on sides and top) and trim will be sufficient. I am looking for a fix because I cant remove the trim .
Any thoughts would be appreciated
Thanks in Advance Willy