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  1. #1
    Senior Member markrvp's Avatar
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    Educate me on Frost

    So the other night I started out in my hammock in the back yard to test my new triangle thingies that hold my underquilt. It got down to 34 degrees. Around 2:30 in the morning I woke up and needed to pee, so went inside and ended up going to sleep in my bed.

    When I went back out in the morning to collect my down sleeping bag and down underquilt, they both had frost on them (as did the grass, the roof, etc.). So my questions are:

    1.) Why did frost form on my sleeping bag and quilt?

    2.) If I had stayed in the hammock all night would my body warmth have kept the frost from forming on them?

    I don't want my down bags getting wet from frost, and it wouldn't always be convenient to wait to get on the trail until the frost is melted. I wouldn't want to put wet down in a backpack, you know?
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  2. #2
    Cali's Avatar
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    Did you have a tarp up? That should prevent frost from collecting on your gear. Just my $.02.
    Happy Hangin!!!


    AKA BajaHanger

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  3. #3
    Whoooo Buddy)))) Shug's Avatar
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    If you used a pad under your feet and had the pad under your TQ...then you may have created a vapor barrier thus frost. It happened to me a good bit.
    Started putting my pad in my TQ and never had it again.
    Skeeter net closed keeps in condensation as well.
    How many socks did you wear?
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  4. #4
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    Quote Originally Posted by BajaHanger View Post
    Did you have a tarp up? That should prevent frost from collecting on your gear. Just my $.02.
    +1

    At that temp, frost shouldnt form if you were in the bag. Moisture will however. A tarp is usually enough to keep the dew (and frost) from forming for the most part.

    Anytime its cold, moisture will form in/on the bag from you. Its not usually a big deal unless your out in the cold for a long trip.

  5. #5
    Senior Member markrvp's Avatar
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    No tarp

    I did NOT have the tarp over the hammock. I will make sure to put it up from now on.

    I was only wearing one pair of wool socks and didn't have a pad.

  6. #6
    DivaB's Avatar
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    There was a thread on this topic quite some time back. I can't find that now, or I may be searching for it wrong. My understanding of it all is that since it was coming up from under you also, that you didn't have a "welcome mat" placed under you. With a tarp over and a ground cover under, and if your not huffing and puffing in there creating a bunch of your own vapor, then you should be fine.

    There something about the moisture also rising from the grass and greenery under you. Just don't know how to explain the science. I'll let one of our many brain children elaborate on that

  7. #7
    BillyBob58's Avatar
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    Frost, like dew and condensation, can be really tricky, particularly ( for me so far ) in an open, exposed, grassy back yard.



    http://www.hammockforums.net/forum/s...ead.php?t=6377

    About 1030PM I put a hot water bottle in my hammock. I noticed that the underside of the tarp and outside of the UQ had a heavy layer of frost on them already. About 11pm I sacked it at about 22*F with a forecast for 15*. I accidentally got my jacket a little damp on the back by contacting the frost on the under side of the tarp, and caused it to "snow" a little into the hammock as I knocked some frost loose.
    This was a heavy frost that formed on my quilts and inside and outside of the tarp during the evening while I was inside the house- with gear already hung outside and ready to test at bedtime. Even inside the hammock had frost where it was not covered by the TQ. The picture is the next morning after my body heat had dried much of the frost, but you can still see some inside the hammock. I have had the same thing happen numerous times with dew/condensation rather than frost, even if I was not in the hammock, soaking the inside of my tarp and maybe the UQ shell. The good news is that it mostly seems to stay on the shell and not so much getting into the down ( though that might be a problem if you have to pack up wet) and also this has never happened to me in the woods.
    Last edited by BillyBob58; 10-31-2012 at 17:06.
    For I consider that the sufferings of this present time are not worthy to be compared with the glory that is to be revealed to us....that the creation itself also will be set free from its slavery to corruption into the freedom of the glory of the children of God. For we know that the whole creation groans and suffers the pains of childbirth together until now.
    Romans 8:18,21-22

  8. #8
    Member Kodaking's Avatar
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    O no! Your supposed to face away from the hammock when watering the grass

  9. #9
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    Quote Originally Posted by Kodaking View Post
    O no! Your supposed to face away from the hammock when watering the grass
    Maybe there wasn't a sign.

  10. #10
    BillyBob58's Avatar
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    Quote Originally Posted by DivaB View Post
    There was a thread on this topic quite some time back. I can't find that now, or I may be searching for it wrong. My understanding of it all is that since it was coming up from under you also, that you didn't have a "welcome mat" placed under you. With a tarp over and a ground cover under, and if your not huffing and puffing in there creating a bunch of your own vapor, then you should be fine.

    There something about the moisture also rising from the grass and greenery under you. Just don't know how to explain the science. I'll let one of our many brain children elaborate on that
    Hmmmmm. Maybe a ground cover would prove useful? I have always figured matters were made worse by how wet the ground and grass are in the winter under where I hang. Then again, when the ground is frozen solid? Still worth a try.
    For I consider that the sufferings of this present time are not worthy to be compared with the glory that is to be revealed to us....that the creation itself also will be set free from its slavery to corruption into the freedom of the glory of the children of God. For we know that the whole creation groans and suffers the pains of childbirth together until now.
    Romans 8:18,21-22

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