Pick up some duct insulation. Basically it is bubble wrap coated on both sides with silver Mylar. We cut pieces to stop sun heat and fading the summer but found it was great to slide it up behind the shades in cold weather on our single pane windows.
You may not want to use it in all your windows but even a couple will save a lot of heat. Also used it to block skylights and ceiling vents that we did not need in the cold.
__________________
2017 SLX 195RB
2021 Jeep Grand Cherokee Summit L 5.7L V8
Andersen WDH hitch, Renogy 100 AH Lithium &
200 Watts solar panels from Renogy
Prev. '14 Jeep Grand Cherokee Overland, gas 3.6 V6
|