material for outdoor window covers

rockhillmanor wrote:
Anything you can put INSIDE on the windows will work the SAME WAY as if you put them on the outside.....and more importantly WHY would anyone put anything on the outside of their RV on their windows. :R

Windshield sun shades placed under the day night shades on all the windows INSIDE your RV will keep the heat in during winter and keep the sun out in summer. KISS theory.

Anything on the inside will keep the sun out but will not stop the heat transfer in the summer. The only way to stop it from penetrating must be done on the outside.
Why would anyone think that something placed on the inside would prevent heat transfer from the outside :S