Polystyrene Insulated Sheet

X2. Easier to roll and store than rigid foam board. I used these summer and winter.

Dale.Traveling wrote:
I use THIS STUFF between the blinds and windows. When not in use I (summer heat and winter cold) they are under the mattress, rolled up and in a shirt closet or behind the couch. Plus being flexible and about 1/4" thick installing is simple the them blind strings hold them in place.

That insulation is great for windshields. It bends to the contour and keeps out most of the heat in the Summer and most of the cold in the Winter. As mentioned, when you are done with it you just roll it up and store it in the basement or any other convenient location.

Dale.Traveling wrote:
I use THIS STUFF between the blinds and windows. When not in use I (summer heat and winter cold) they are under the mattress, rolled up and in a shirt closet or behind the couch. Plus being flexible and about 1/4" thick installing is simple the them blind strings hold them in place.

X2. Use the same stuff and it's much easier to work with and use than the rigid insulation board.

I use THIS STUFF between the blinds and windows. When not in use I (summer heat and winter cold) they are under the mattress, rolled up and in a shirt closet or behind the couch. Plus being flexible and about 1/4" thick installing is simple the them blind strings hold them in place.

My bed in the rear sits in the corner and is tight up against the wall and back of the coach. This past winter, I finally put up a 2 inch board along the whole wall, and the also covered the back window as well. It made a very big difference, as I could actually sleep touching the wall. I did find that you have to seal the edges, otherwise there will be a small circulation of air that bleeds around the outside. I've been camping over Christmas for the past 12 years. It is not uncommon to hit single digits at night. While the coach was always warm, the cold radiated off the windows, so there would be cold spots in bed. Yes, it is well worth it.

Someone said they made vent inserts out of the 1/2" insulation board. Don't know why the 1" can't be used.

Personally, I'm not camping where it's that cold.

No but good idea!!!