Since we do a reasonable amount of fall/winter camping, and lots when it is hot I decided to see what I could do to solve the issue with single pane windows. Biggest is heat gain in the summer and needing heat higher in the winter since sitting near window feels colder.So.... off to the hardware store to get the Window film kits they sell for houses to make double pane windows. Basically a thin heat shrink plastic and double sided tape.I tried it on a few windows two trips ago, definitely noticed it solved the condensation problem and DW said sitting in the dinette she felt warmer. The issue was the cheap film I bought had marginal tape and they soon started coming loose.So, this last week I tried again with 3M film and tape. Success. Held up great for our trip to the coast. felt much warmer inside.I used the film on all the fixed panes and all the sliding windows. I didn't use it on the awning windows, that still gives us enough windows for ventilation. Uncovered panes did fog, but not the rest and I was able to lower the thermostat by 2 degrees and we were still warm, and the furnace seemed to run less.Installation was easy, run the tape around the frame trim, put the film on and adjust it to be reasonably taught and straight then hit it with a hair dryer. It shrinks enough to make a nice clear tight panel. Hard to see which ones had film on them or not.And to remove, if you want, the tape is designed to stick harder to the film than to the frame, so when you pull up on the film to remove it , the tape comes with it.Total cost for all the trailer windows was less than $15.If this works well, I may go to tap plastics and have plastic cut for the bigger frames and screw them on for a more permanent fix.

This is cool. I bought a roll of Reflectix at Lowe's and cut a piece slightly larger than each window and put it in and take it out as needed. More than $15 but very effective and flexible.

rjf7g wrote:This is cool. I bought a roll of Reflectix at Lowe's and cut a piece slightly larger than each window and put it in and take it out as needed. More than $15 but very effective and flexible.another good solution. less visibility but more insulation.

Do you have a picture of this stuff or actual name, never heard it.

Hornnumb2 wrote:Do you have a picture of this stuff or actual name, never heard it.I think he's talking about window insulator kits

BuckyBadger wrote:Hornnumb2 wrote:Do you have a picture of this stuff or actual name, never heard it.I think he's talking about window insulator kitsyup that's what I used. Be aware other brands may not be the quality you want,

Poor Man's double pane windows | Good Sam Community

rjf7g
Explorer
Oct 12, 2016
This is cool. I bought a roll of Reflectix at Lowe's and cut a piece slightly larger than each window and put it in and take it out as needed. More than $15 but very effective and flexible.
ktmrfs
Explorer II
Oct 12, 2016
rjf7g wrote:
This is cool. I bought a roll of Reflectix at Lowe's and cut a piece slightly larger than each window and put it in and take it out as needed. More than $15 but very effective and flexible.

another good solution. less visibility but more insulation.
Hornnumb2
Explorer
Oct 12, 2016
Do you have a picture of this stuff or actual name, never heard it.
BuckyBadger
Explorer
Oct 13, 2016
Hornnumb2 wrote:
Do you have a picture of this stuff or actual name, never heard it.

I think he's talking about window insulator kits
ktmrfs
Explorer II
Oct 13, 2016
BuckyBadger wrote:
Hornnumb2 wrote:
Do you have a picture of this stuff or actual name, never heard it.

I think he's talking about window insulator kits

yup that's what I used. Be aware other brands may not be the quality you want,
Strabo
Explorer
Oct 13, 2016
rjf7g wrote:
This is cool. I bought a roll of Reflectix at Lowe's and cut a piece slightly larger than each window and put it in and take it out as needed. More than $15 but very effective and flexible.

Used the same thing, big improvement.
ktmrfs
Explorer II
Oct 13, 2016
My next step is to make something more permanent. Went to TAP plastics and had them cut me a couple of pieces of plastic to try for a double pane window. Not a bad price and they did the radiused corners. Will be trying it to see how well it works, and if it works as expected will do all the windows.
JiminDenver
Explorer II
Oct 22, 2016
I have gone even less permanent by using glad press and seal wrap. It sticks well to the frames and comes off with ease. Larger windows take multiple pieces so it's best to put them together before hanging.

We have also used thick bath towels and I'm cutting covers out of 1/4 inch foam.
ktmrfs
Explorer II
Oct 23, 2016
JiminDenver wrote:
I have gone even less permanent by using glad press and seal wrap. It sticks well to the frames and comes off with ease. Larger windows take multiple pieces so it's best to put them together before hanging.

We have also used thick bath towels and I'm cutting covers out of 1/4 inch foam.

It's amazing how little effort it takes to make a huge improvement in either winter or summer with single pane windows.

towels, cling wrap, foam, etc. all make a big improvement.

DW has hung towels or sheets over the windows on the inside in the summer on the windows facing the sun and the improvment was very noticeable.

and the glad wrap is really the same material as the shrink wrap and tape for windows.
Hudsoner
Explorer
Oct 23, 2016
ktmrfs wrote:

and the glad wrap is really the same material as the shrink wrap and tape for windows.

You are pretty wrong here with your statement. Glad Wrap or other "cling wrap" is mostly made of LDPE (Low-Density Polyethylene). It used to be mostly made of PVC until a few years ago.

The window insulation film is mostly made of a polyolefin, or more specific of polypropylene that underwent a specific heat treatment process.