window r.o. two big

seaocean_180

i have a new construction house and made an error on the r.o. on all the window r.o by 2 inches larger and taller than necessary.
would like to just add an aditional sill and a jack on one side to fill the gap. the windows are vinal.
window size is 35.5 inches and my r.o is 38 inches
also thought of mabee wraping the window r.o with a 3/4x6 inch wood to take up some of the space.
the window flange on each side is 5/8 or so i think
thank you matt

joecaption

Both ways would work, but using just 1, 2 X at the bottom and on one side would cut your work in 1/2 and there would be less chance of ending up with a nail between the pieces.

BigJim

That would work, just don't add any to the bottom of your header, it will make all your windows too low.

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Jim

hand drive

make sure to add the filler the exact same on each window so they do sit in the openings differently etc... also, rework the housewrap/window wrap so that it is sealed tight after the new filler. filling in at the top might be the best way to do it and do not mess with the bottoms of the window plate/sill and wrap. new constructon window flange should be about 1- 1/8" surrounding entire window with the nail holes about 1/4" to 3/8" in from edge of flange..

if you do wrap with a 3/4" piece do not use plywood as it will not accept nails through the edge and into the separate plys...

seaocean_180

ok thanx .. yes i was planning on using good plywood not osb.. or a good grade 1x6u so as to have a good surface. ...
todaly brain farted on the window r.o but everything else came out great..
lol. i gave the #the to the framers so guess this one on me
thanx for the advice matt