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Full Version: Reflectix & getting caught by the cold
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Even though most van dwellers are fundamentally snowbirds, our changing weather patterns might put us in a 'surprise' cold-weather situation.  Or even just having to stop in a mountain range that has its own weather (breakdown, whiteout, LEO event, etc).

And, I was just fixing up the dog's igloo for winter.  She (Chow/Pom) stays indoors at night in the winter, but outside during the day (unless it's really cold).  The Igloo is advertised as 'insulated'; maybe the plastic it's made from has some bubbles in it, but a quarter-inch of plastic isn't what I would call 'insulated'.  I bought some Reflectix, and loosely lined the inside of the igloo with it, mostly holding it in place with a bolt through the top so it's like a tent inside the igloo.  The floor is 2" of rigid styrofoam with a Reflectix mat on top.  Okay, so much for the dog.

Today's 'I wonder if...'  is the usefulness of having Reflectix much nearer the human body in a van:  Has anyone ever tried slipping a sheet of Reflectix under the sheet (and maybe under a blanket or mattress pad) to reflect body heat back in unusually cold conditions? 

What about using it as an extra blanket, maybe sandwiched between your regular blankets?

Any info or thoughts would be welcome.
never tried it, but it sounds reasonable, maybe using something thicker than a sheet between, though, as Reflectix needs air space
heat rises, so I'd go with reflex on to of a blanket or quilt maybe
I have Oak window frames and black bungee cord running across conversion van window interiors. While I have tight fitting layered cardboard panels black facing out, inside the window frame, when the sun bakes these windows, they still radiate a lot of heat to interior.

The 99 cent store was selling the reflectix style window shades and I slip these behind the bungee cords and radiated heat is significantly reduced, and in winter time I can feel some heat reflected back at me from my own body.

In general extra pillows or blankets held to window via the bungee cords work way better as insulation.

The reflectix negatively affects my Wifi signals.
I never tried reflectix under my mattress, but I have in the past used a couple of those $3.00 emergency Mylar blankets to line the bed platform my futon was on.
We had a recent thread here on using a space blanket.  Consensus was that it would prevent your perspiration from escaping and your bedding would end up being soaked by your own sweat.  I believe reflectix would have the same problem if you used it OVER your bedding.  It MIGHT be ok under you, since perspiration rises.  I guess it would be like those waterproof covers sometimes put on mattresses.  But since there would be no air space, I don't know if you would actually accomplish anything useful.
A couple of hours ago I watched a Youtube Video about using reflectix and an exercise mat in the bottom of a hammock. About the 6 minute mark https://www.youtube.com/watch?v=ihyNZHk-jL4
The only disadvantage I have heard about mylar, (space blanket, reflectix), is it is a vapor barrier. If you get warm enough to sweat, you will be wet. It might be a challenge to regulate how warm you get.
Reflectix or any vapor barrier will definitely create dampness.

How much dampness will occur is dependent on the outside temperature as opposed to the temperature inside your sleeping area.

In my hammock, for example, I use a silnylon underquilt protector to block the wind and cold. The silnylon would be comparable to reflectix in that it does not allow moisture through. It doesn't reflect heat so it only blocks it's loss.

On mild nights, the underquilt stays warm and dry. On a really cold night, I've gotten up in the morning to find a puddle on the silnylon and the underquilt quite wet. Fortunately one time I was able to dry out the quilt during the day and the second time it happened was 'heading home' day so it didn't matter. Both times the underquilt was wet enough that I would not have been able to use it a second night without getting me wet as well.

You're much better off changing to heavier thermal under garments and adding a blanket or two. Also making sure that if you're sleeping on any kind of air pad that you have sufficient insulation between yourself and it will prevent heat loss. BTW I love my microfleece thermal long underwear...bought at Marks WW.
I think you're all correct about using on top. Thinking back to when I used acrylic blankets, I would be cold sometimes, and feel slightly damp. When I switched to wool blankets, I didn't have the problem. Good thinking!
(09-28-2016, 12:49 PM)SternWake Wrote: [ -> ]The reflectix negatively affects my Wifi signals.

This worries me as I'm about to start insulating my van.

Have others noticed a difference in wifi signal strength after installing reflectix?
Does the Reflectix affect the WiFi if it's BELOW the unit?

Of course, you realize what SternWake has discovered: TIN FOIL HATS WORK!
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