The correct shades in the windows can fix your problem if most the heat is coming from having anyrhing in the windows. Tint can also help. If your windows are angled at the top, go with the tint as a blind or shade is going to be very expensive. A Hunter Douglas Duette Archetella shade will be the best insulating shade you can get. Give me some dimensions and I can give you a price. Please do it by private message if your interested. I've owned a blind and shade business for 12yrs