I put side panels of Reflectix up on our pop-up but it was an Apache solid state (no canvas, all upper sections were ABS). I still have Reflectix "laying around" in the Class C that we upgraded to. So far, I've made a 3 pc windshield cover, inserts for all the windows (lose a lot of heat out those suckers) and have velcroed a piece to the interior side of our screen door (to reflect the heat back in and keep the cold out). All my pieces are covered with canvas cut from painter drop cloths (that contact cement in a spray can is neat... just don't use it inside). When traveling, I slide all the pieces under the air mattress, just like I used to in the pop-up.

Just thought I would follow up. I insulated the 'bed floors' of my Utah CP and created window insulation as I was suggesting. This really made the beds warmer/cooler, quieter and darker. The insulation I used on the beds was Reflectix as you would use in a house. It is not the greatest as it has a tendency to tear and the aluminum tends to rub off.

I learned from this experience and found the 'plastic' version for the windows. Since it is plastic on the outside, it does not wear off onto the canvas. To make the cutouts, I used 2 large pieces of brown paper to make templates for a side window and an end window. Cut 4 sides and two ends and then store them under the bed. I only wish I had used the plastic version under the mattresses as well as made them before freezing last fall/winter.

It definitely take less energy to heat and cool the P-UP now. Less wind blowing through the ends carrying the air away.

2007 Fleetwood Utah CP
2000 Honda Odyssey