Rolling wigwam /organic vardo/geodesic

[John61CT]

Posted elsewhere, thanks G

And while surfing You Tube , I saw this and thought of “ Thrifty Alternatives” … https://www.youtube.com/watch?v=sc6ZXR0 ... &index=126

[GPW]

And a friend on facebook just gave me an idea for a Thrifty insulation under the canvas … Bubble wrap … Plausible !!!

[Pmullen503]

I've been looking into radiant barrier insulation (mylar faced bubble wrap) for a fabric covered, skin on frame style construction for a lifting roof build. The reflective insulation does a good job reflecting heat on a sunny day. It should make an unheated camper more comfortable on a cold night. It's not great if you are heating the air; it's R value is low.

There's a difference between reflecting radiant (IR) heat and resisting conduction of heat (R value).

[John61CT]

Reflectix, aka mylar faced bubble wrap is not an effective insulation **at all**.

R-value is how you measure true insulation effectiveness, this stuff is very close to ZERO.

With a large sealed airspace to the outside, mylar reflecting side pointing out

it can help prevent inbound **radiant** energy from entering the living space.

But those required conditions are not suitable for a mobile context.

Does nothing retaining heat pointing inside.

Any plastic does the "vapour barrier" function of sealing against convection.

The bubble wrap does nothing.