I used cellular shade which were honey comb and black out. I did this about 6 years ago and I am not sure about the details but will try to find out it anyone interested. They are a liftime guarrantee and I have sent a couple back for new strings. The one on the front or cordless. They really make a different on the heating and cooling. I am sure that I spent less than 1K for all window and I did do the install myself. I have one that I have to take down and send back for repair and I will get the Manufacture name and number off of the blind.