e use Tyvek then tent then a space blanket inside the tent, shiny side up. It's surprising how much body heat reflects up off the space blanket when it's cold.
photohiker wrote:The Thermarest Neo-air sleeping pad has a reflective layer in it, so at least someone is paying attention.
Making a tent with reflective foil layer (RFL) is an interesting idea. I wonder why no-one has tried it.
photohiker wrote:Making a tent with reflective foil layer (RFL) is an interesting idea. I wonder why no-one has tried it.
sthughes wrote:The RFL needs to face whatever you are trying to block. So to keep the heat in it is better to face in, not out. That's my understanding anyway.
alliecat wrote:photohiker wrote:Making a tent with reflective foil layer (RFL) is an interesting idea. I wonder why no-one has tried it.
Like this?
It was displayed at an outdoor show in the US recently. It's the only time I've seen a tent with a reflective layer.
I must try Adam's trick with a space blanket on the floor of the tent and see if it makes a noticeable difference.
photohiker wrote:sthughes wrote:The RFL needs to face whatever you are trying to block. So to keep the heat in it is better to face in, not out. That's my understanding anyway.
Sorry sthughes, but that is a misconception. The RFL reflects yes, but it works just as well (within a percent or two) when the reflective surface faces the other way. This is because highly reflective surfaces have very low emissivity. If you think about it, the Sisalation on our houses is all applied shiny side in these days for a couple of reasons: 1) the OHS people didn't like the UV exposure on the installers, 2) dust buildup under tiles etc on top of the RFL reduces its reflective qualities and therefore the effectiveness of the RFL. Turn it over and the dust problem goes away.
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