Heat conduction containment between windows and curtains
How do I contain the heat rising between curtains and windows in east and south facing windows? (on the cheap, please) It will spread across the ceiling and blast into the room...ugh...? I just installed new thermal draperies that go from floor to above window but there is that gap at the top...and no room for a valance type box... The east windows span 124" x 69"--5 Anderson type windows. The left and right ends of the windows (5 panes) are the ones that open. The south wall is 124" by 56"--two panes, both crank open.
Any good easy practical suggestions?