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Open Roads Forum  >  Do It Yourself Modifications and Upgrades (DIY)

 > Foam pad on window in RV door: monofilament holds it in

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profdant139

Southern California

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Posted: 01/04/18 05:19pm Link  |  Quote  |  Print  |  Notify Moderator

We often camp in pretty cold conditions – subfreezing but not sub-zero. On a recent winter trip, we realized that the frosted single-pane window that is inset into the trailer door was losing a lot of heat. So when I got home, I rigged up a way to hold a foam insulating pad on the inside of that window. I think that other folks who camp in cold weather might find this useful.

As I do on our other windows, I used foam flooring material (from Costco), which comes in interlocking panels (about 2 feet square), cut down to fit the window opening. The foam is about a half inch thick and is fairly stiff. The window in our trailer's door was about 21 inches by 15 inches. (Actually, I measured it in millimeters to give myself the illusion of precision.) I cut the pad to size with a box cutter:

[image]
[image]Click For Full-Size Image.

The trickiest issue is how to hold the pad in place? I thought about Velcro or magnets (my best friends) but decided to string four strands of monofilament fishing line (10 lb. test, I think) across the window to contain the pad. Here is a shot of the finished project with the pad in place:

[image]
[image]Click For Full-Size Image.

And this is a close-up of one of the monofilament cross-strings:

[image]
[image]Click For Full-Size Image.

In order to create the cross-strings, I first took out a screw (one at a time!) and stuck one end of the string into the hole:

[image]
[image]Click For Full-Size Image.

(By the way, please excuse the greasy fingers -- that's what my hands look like on a "garage day.")

I then screwed the screw back into the hole, trapping the end of the monofilament:

[image]
[image]Click For Full-Size Image.

After tightening that screw, I removed the screw on the opposite side of the frame. I cut the monofilament to be about 3/4 of an inch too long and then stuck that end of the line into the screw hole. As I tightened the screw, it tightened the monofilament, taking up the slack. (Bonus – if you tighten the monofilament just right and then tap it with your finger, it sounds like a cheap ukulele.)

In order to install the insulating pad, just slip one end under the lowest string and slide it up into place. Remove it by sliding it down. We store it under one of the dinette cushions -- a little extra padding never hurt anything, right?


2012 Fun Finder X-139 "Boondock Style" (axle-flipped and extra insulation)
2013 Toyota Tacoma Off-Road (semi-beefy tires and components)
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SoundGuy

S Ontario

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Posted: 01/04/18 05:43pm Link  |  Quote  |  Print  |  Notify Moderator

Back when we owned a popup and later a hybrid I used Reflectix in each of the tent windows, trapped between the screening and tenting. The difference in hot weather keeping the trailer much cooler and in very cold weather keeping it much warmer was dramatic. I'd expect you'd find it much more effective for this application as well ... sold at big box home improvement stores like Home Depot, Lowes, etc.

beemerphile1

Ohio

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Posted: 01/04/18 05:53pm Link  |  Quote  |  Print  |  Notify Moderator

Reflectix and Velcro for us.


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profdant139

Southern California

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Posted: 01/04/18 07:51pm Link  |  Quote  |  Print  |  Notify Moderator

Yes, Reflectix would work -- this foam pad probably has about the same R-value, but it is stiffer (which helps it stay in place). Reflectix is lighter, which is often a good thing.

I did not want to put velcro on the window, so that is why I went with the fishing line. Plus, the fishing line is just plain funny, and that is always a big plus.

Peg Leg

Anderson, IN

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Posted: 01/04/18 09:28pm Link  |  Quote  |  Print  |  Notify Moderator

I don't care how much tuning I did on those strings, I still wouldn't be able to play a tune. Don't know how my son ended up majoring in music.


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Farmboy666

Pisgah Forest, NC

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Posted: 01/05/18 07:15am Link  |  Quote  |  Print  |  Notify Moderator

I had to use something to hold the insulating cushions in the roof vents. I found some stretchy flat cord in walmart sewing section. It's 1/2 wide and came in a roll, I loosened the trim screws and stuck it behind the trim piece on each side so it straddles the opening. Being stretchy it's real easy to take the cushions in and out. It might not work well with something thin but great for the cushions.

profdant139

Southern California

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Posted: 01/05/18 12:46pm Link  |  Quote  |  Print  |  Notify Moderator

Farmboy, that sounds like a winner -- if you get a chance, could you post some photos to show how that works? Thanks.

Ron3rd

Upland, CA USA

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Posted: 01/05/18 02:25pm Link  |  Quote  |  Print  |  Notify Moderator

I like your idea; I want to put a removable foam piece in the skylight in the shower. It tapers outward making the stuff-in concept used with roof vents useless. Didn't want to use Velcro either due to the steam and moisture.


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Farmboy666

Pisgah Forest, NC

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Posted: 01/05/18 03:32pm Link  |  Quote  |  Print  |  Notify Moderator

profdant139 wrote:

Farmboy, that sounds like a winner -- if you get a chance, could you post some photos to show how that works? Thanks.


[image]

[image]

profdant139

Southern California

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Posted: 01/05/18 06:56pm Link  |  Quote  |  Print  |  Notify Moderator

Farmboy, that is great! But what keeps the end of the elastic from popping out of the trim? Is it sewn double thick at the end, maybe?

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