Window Rough Opening Diagram. Add the header size the window jamb height 30 inches for the sill height and ½inch wiggle room. Each of the major components are labeled and described below.
This will give you room to space the door frame off of the sub-floor. Just add 2 to the width of the actual door size. Sliding window heights available are 24in 36in 48in and 60 inches tall.
Ensure that the rough opening is plumb level and square and the walls in the opening are not twisted.
The adjacent diagram shows a traditionally framed window opening from a recent project. Add the header size the window jamb height 30 inches for the sill height and ½inch wiggle room. A 1 12 38 mm solid blocking is required at the sill and sides of the opening. Cut Blueskin the width of window rough opening plus 6.