The Warm Windows website has very easy instructions on making curtains with…
Kume insulating curtains reduce heat loss through windows by
You can greatly increase the efficiency of a window system by adjusting the design of the curtains. Try using a pelmet box or making your own DIY closed top curtain track.
Make a Wool Curtain Out of a Surplus Blanket! Cheaper than buying wool curtains. Note: combining wool curtains with weather strips ensures that windows keep out the winter cold
Insulating Curtains That Cut Heat Losses Through Windows by
DIY Insulating curtains that cut heat losses through windows by
Frugal by Choice, Cheap by Necessity: DIY insulated curtains
insulated window roll up
Energy-saving Trellis Print Grommet-Top Insulated Curtains keep winter heat in, summer sun out. Use this window treatments in any room.
Construct thermal curtains (theater blackout/sound curtains, back porch cabinet drafts, around mbed)