Results 1 to 4 of 4
  1. #1

    Vapor Barrier/Undercover

    I'm on the Left Coast and will be hangin in 'above freezing temps'. I have a DIY hammock and a JRB Shenandoah for a UQ. I'm thinking of making an undercover as a windbreak and protect the UQ from splashing rain. I was looking at this material from DYI Gear:

    "30d Ripstop Nylon, Metalized reflective coating one side. DWR. 60" wide.

    Navy Blue or Green

    30 Denier Ripstop Nylon with metalized reflective coating on one side. This material can be used to reflect heat in insulation systems very effectively. You will be amazed at how much heat comes back.

    This material is not breathable, so it acts as a vapor barrier, so if used in sleeping bag or quilt systems be sure you know how to manage moisture properly. We have been using this very effectively in making freezer bag cozies with Insultex or Climashield as the insulation."

    This would be suspended with shock cord in the side channels and drawstrings on the end. (The UQ is hung on the hammock.)

    Will moisture be a problem if the undercover is taken off each morning? Any moisture/condensation would be on the undercover and pool there? As long as there was only windblown, incidental contact between the UQ and undercover (the underquilt isn't sitting in a puddle)...? Will an undercover add a few degrees of warmth to the equation? Is there a more suitable fabric? Good idea/Bad idea?

    All thoughts welcome

  2. #2
    PuckerFactor's Avatar
    Join Date
    Jun 2009
    Location
    SW VA
    Hammock
    DIY 11' double layer 1.1
    Tarp
    huge DIY camo
    Insulation
    DIY 9oz. Primaloft
    Suspension
    7/64"whoopie sling
    Posts
    1,208
    The only problem with that might be that your vapor barrier is on the outside of your insulation. Generally, you want it next to the hammock, so that the water vapor doesn't condense in your UQ.
    In this situation, I think I would be more inclined to bring a breathable DWR UQ protector, and a space blanket to lay between the hammock and UQ. I don't know what the weight of the metalized 30D nylon is, but there might be a small weight difference.

    Hope that helps,
    PF
    It's better to have it and not need it than need it and not have it.

    Formerly known as Acercanto, my trail name is MacGuyver to some, and Pucker Factor to others.

    It's not procrastinating, its proactively delaying the implementation of the energy-intensive phase of the project until the enthusiasm factor is at its maximum effectiveness. - Randy Glasbergen

  3. #3
    Whoooo Buddy)))) Shug's Avatar
    Join Date
    Oct 2007
    Location
    Minnesota
    Hammock
    DIY GreenBeanHammock
    Tarp
    DIY Tarps/HG Cuben
    Insulation
    Frankenquilt/Pod
    Suspension
    Whoopie Slings
    Posts
    14,488
    Images
    62
    I used my ULA RainWrap (silnylon) a few times as a weathershield.....hung it loose and had no moisture. Coulda just gotten lucky.
    Shug

    Whoooo Buddy)))) I Love Onions, Grits, Greens, Livermush, NC Style BBQ, Potted Meat, Anchovies, 'Naner Puddin", Peanut Butter Pie, Red Velvet Cake and Cocoa and Straaaaaawwwwberrrry Milk and Coffee Crisps....
    I Hope Heaven has a Bakery!!!!



    Shug's YouTube Videos

    Hammock How-To Videos ..... Essentials For Noobs

    Shug and Friends Jammin'

  4. #4
    BillyBob58's Avatar
    Join Date
    Jan 2007
    Location
    Tupelo, MS
    Posts
    8,463
    Images
    353
    Quote Originally Posted by Shug View Post
    I used my ULA RainWrap (silnylon) a few times as a weathershield.....hung it loose and had no moisture. Coulda just gotten lucky.
    Shug

    Yep, if it hangs loose you might get away with it. But it will be cold, and vapor that hits it will condense. Or, you could put a VB or space blanket between you and the UQ and very close to your hammock- to keep it warm- and then you should not have any condensation. Probably not, but you will need to experiment where you can bail safely. It always works for me. Also, with and exterior wind/moisture block combined with an interior VB/reflective barrier. you can expect a very significant temperature boost. But using a VB only on the exterior, you will really have to guard against/watch for condensation.
    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

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •