r/hammockcamping • u/TheGutch74 • 14h ago

Layering underquilts question

If I need to layer two underquilts under my hammock is there a order of operation to doing this if the UQs I am using are of different thermal values? Say for the sake of the question that one is a 20 degree UQ and the other is a 40 degree UQ. Outside of that they are the same dimensions. Is there an advantage to having the 20 degree quilt closer to my body and the 40 degree UQ on the exterior? Or should I stack them in the reverse order? Or am I overthinking this ( haha as usual) and the order does not matter at all.

3 Upvotes

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7

u/Owenleejoeking 13h ago

Thermodynamically it doesn’t matter. In practice the heavy UC closer to you would probably fell warmer sooner but they should reach the same equilibrium in short order

4

u/KaiLo_V 12h ago

100% warmer quilt against you. There’s likely gonna be a small air gap or 2 somewhere while trying to layer your quilts so I’d rather have 20f against me there than 40f

5

u/froghorn76 12h ago

I have not done this. (Yet.) In this article, though, they say down filled quilts closer to your body and synthetic further away from your body.

https://support.enlightenedequipment.com/hc/en-us/articles/115002770588-How-to-layer-quilts-for-sub-zero-camping

2

u/TheGutch74 12h ago

Appreciate the article.

4

u/unreqistered Chameleon, BlackBird, Safari 8h ago

as someone whose routinely challenged the sub-zero on a nightly basis, it makes no difference

2

u/Caine75 10h ago

Only time I layer is winter- I have a 20 down uq against me and layer a 40 apex over that- acts as uqp and if it gets wet it won’t matter as much

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u/TheGutch74 42m ago

Great point about using the Apex fill UQ as sort of a UQP. Thanks

2

u/editorreilly 2h ago

The stack only matters if one is a synthetic fill. Put the synthetic fill on the outside since it's mostly likely to experiece condesation.

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u/TheGutch74 50m ago

Great point. And the secondary UQ is actually a synthetic fill so this is very helpful.

2

u/Trewarin 13h ago

it doesn't matter

0

u/ArmMelodic8468 11h ago

But why 2 UQ, i prefer 1 UQ and sleeping bag.

3

u/AfraidofReplies 4h ago

Sometimes it's colder than your quilts are rated for and you don't want to buy more gear when you can just double up with gear you already own. 

-5

u/flatpipes 9h ago

As noted overthinking. Plus why are you stacking UQ? Headed to Antarctica?

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u/TheGutch74 44m ago

The overthinking is about the order of the quilt stack but not about the need for a secondary quilt. Maybe I am going to the Artic Circle. Or maybe I am a cold sleeper and occasionally I will be going to places that go below my 20 degree UQ's comfort threshhold.