When is it too cold for Tarping?
I'm looking to get a tarp, and considering when I want to go out with it. My three season tent with the rain fly has pretty good heat retention, and while it doesn't get toasty, it does stay warmer than the surrounding outdoors. Tarps from my current experience have to be pitched with quite a bit of angle and venting to prevent excess condensation, leading me to believe they will be much colder.
Is there a rule of thumb for when it's cold enough to pull out the tent and not use the tarp?
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I would say it's not a question of too cold, tents don't add that much warmth. Tarps and a shovel can make some very nice shelters in the snow. The real limitation is blowing snow/rain and the wind speed you expect to stand.
If the wind is shifting at all, or is much above 20 mph, a tarp is going to be fairly miserable. ( I'm not including floorless tents like the megamid, but a plain old tarp ). The big advantage of a tent over a tarp in the cold is that it provides an omni-directional wind shelter.
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I would say... never.
What is a tarp but something that keeps precipitation off of you. In humid summer months, sure, condensation can cause precipitation under the tarp, but in winter, this is not so much a concern, and you can pitch it lower to the ground. You might get frost inside - but just shake it off when you pack up.
Tents provide a few degrees of warmth by trapping a bit of your body heat - but that thin layer of nylon (or two) can only do so much. (And not near as much as, say, a snow cave.)
I have slept in the winter without any shelter in a -40 degree bag, and woke up with 4 inches of snow on me. I was soaked but tolerably comfortable. Had I had a tarp, it would have shed the snow off me, and I would have been perfectly fine in my 15 degree down bag (and, in point of fact, I have done this on several occasions.)
So, what is the take home message?
- If your bag is warm enough, a tarp is just the light-weight ticket to keep you dry.
- If your bag is not warm enough, then consider a full tent to trap those critical few degrees.
Bonus Protip: When snow camping, a tarp makes an excellent roof to a dug-out, high walled snow-fortress. Less work than a full-on snow cave.
Bonus (slightly related) Protip: A candle lantern in your tent can add a noticeable amount of warmth, and help keep things ever so slightly drier.
This post was sourced from https://outdoors.stackexchange.com/a/3285. It is licensed under CC BY-SA 3.0.
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