7 yds = 21 feet of 60" wide (ish) material.
You said your doing a 11 foot ridge...
11' x 2 = 22'
The way I figure it, your short here? err, am I missing somethin'?
Two panels at 11' long is pretty standard. Remember your going to loose some length for hem allowance. Standard ridgeline seam, yadayada..
You'll have four weird shaped scraps from the end cat cuts. They may be salvageable for a set of franken-doors.