Take the 2-minute tour ×  I am building a new patio/sunroom, and
I have framed up a small shear wall, along with openings for 2
new 4x6 windows. As I tried to install the windows today, I
realize that the openings are out of square. One opening is not
allowing the top of the window to sit into the opening by 1/8
inch, and I don't have enough slack on the other side to bring
it up.  The other opening next to it, is out of square too far
to one side. So I will need to put in more than shims to make it
attach.  Any practical suggestions?  share|improve this question
add comment  1 Answer  Rough openings are exactly as they are
called, rough. Yours sounds extra rough though. All rough
openings are made to have space to add shims, sometimes the
rough openings, because of conditions, can only take shims on
one side or the other.  As a rule of thumb I usually do not use
no more than 2 shims on a side. If the rough opening (RO) has
need for more, I usually add a piece of plywood to bring the
opening down where 2 shim