Page 1 of 2 12 LastLast
Results 1 to 10 of 13
  1. #1
    New Member skibum's Avatar
    Join Date
    Jul 2012
    Location
    Massachusetts
    Hammock
    Grand Trunk UL
    Tarp
    10x11 hex DIY
    Insulation
    Geese and sheep!
    Suspension
    Straps-biner-cord
    Posts
    14

    Mylar Blanket as Underquilt

    I had an idea for a 3-season underquilt: A mylar blanket covered in nylon, for durability and protection. The blanket could be suspended fron the hammock much like an underquilt with shock cord. The last time I used a space blanket was on a survival overnight in the pouring rain, and huddled under my shelter, I slowly tore the fragile blanket to pieces throughout the sleepless night, so the fragility of the material might prevent this idea from working at all.

    Most space blankets are about 60x80in, but i think the size could be smaller, and the edges of the blanket folded down to create more strength where the nylon would attach to the blanket and where the suspension would be connected.

    Has anyone tried this? Would the reflecting properties of the space blanket still work with the nylon covering? Thoughts?

  2. #2
    Acer's Avatar
    Join Date
    Jul 2011
    Location
    Southern Indiana Wooded Hills
    Hammock
    WBRR, BMBH UL, Diy M90 MR Gathered
    Tarp
    HG Cuben 4/Tadpole
    Insulation
    Lynx/UGQ/TeWa
    Suspension
    Straps/Dutch Bling
    Posts
    3,808
    Images
    14
    It would then become a vapor barrier,,and if you sweat,,or your body heat condenses,,then no way to get rid of the moisture,,how ever,,some use it.

  3. #3
    packeagle's Avatar
    Join Date
    Apr 2010
    Location
    Saginaw, Michigan
    Hammock
    DIY Table Cloth/ Jerry 5
    Tarp
    11x12' Hex Sil
    Insulation
    Various UQ/TQ
    Suspension
    Webbing or Etrunks
    Posts
    1,202
    Images
    18
    I use a space blanket to supplement a down under quilt in winter. I use the adventure medical kits one that is more rubbery than the standard mylar and have had much better luck with durability. It could work alone for summer temps though.

  4. #4
    Senior Member WetRivrRat's Avatar
    Join Date
    Jul 2012
    Location
    In the woods
    Posts
    446
    rather than go through that hassle - you could just try a reflective ripstop...
    DIYGearSupply.com has some - seems to function similarly, though I haven't had a chance to put it into field use yet, just around the house...
    We all know of the original "Walk off the war" thru-hike - but, check out these guys, they're helping folks 'walk off the war' today -
    Donate to help fund gear for the warriors who are coming back home and need help walking off the war!
    WarriorHike.com

  5. #5
    Senior Member XSrcing's Avatar
    Join Date
    Jul 2012
    Location
    Bellingham, WA
    Hammock
    DIY double layer
    Tarp
    Old Eddie Bauer
    Insulation
    Bag and pad
    Suspension
    Whoopies
    Posts
    347
    Buy a cheap truck windshield reflector.

  6. #6
    Senior Member Rolloff's Avatar
    Join Date
    Dec 2010
    Location
    Leveland
    Hammock
    BIAS WW
    Tarp
    AHE Toxaway
    Insulation
    JRB SS HG Clone
    Suspension
    Whoopies Straps
    Posts
    1,201
    I use a windshield protector. Works best for me as supplemental insulation, for the windward or exposed side of the hammock(where ever the cold spot shows up).

    Seems to condense minimally used that way, as compared to being employed as a vapor layer.
    This place you say your lookin' for
    It might have washed out with the rain
    Might not be there anymore
    Might not be the same

  7. #7
    New Member skibum's Avatar
    Join Date
    Jul 2012
    Location
    Massachusetts
    Hammock
    Grand Trunk UL
    Tarp
    10x11 hex DIY
    Insulation
    Geese and sheep!
    Suspension
    Straps-biner-cord
    Posts
    14
    Thank you everyone for your replies! It seems as though condensation would be the biggest issue here, especially since heat would be trapped between my hammock and the sheet. I guess I would have to try it out to see just how bad it would get. I'd also have to see what the temperature limit is with the stuff. I am usually fine in just a 20˚ sleeping bag down to about 40 or 50 with no insulation.

    The fabric that WetRiverRat suggested would seem like a good bet, and I'll I'd need would be about 2 yards, so if it doesn't work, no big deal.

    Thanks again for the advice!

  8. #8
    Senior Member DemostiX's Avatar
    Join Date
    Jan 2011
    Location
    Like Lewis & Clark: Wintrin' o/t Columbia again: PDX
    Hammock
    Clark w 2QZQ mod,Tropical, NX;Nano
    Tarp
    Clark micro
    Insulation
    Major down
    Suspension
    7/64 SK75 +strap
    Posts
    2,325
    Images
    13
    No, it isn't trapped heat that is the problem, it is rapidly cooling water-vapor saturated air. The metalized mylar may as well be a plastic sheet without metal for the little good the reflective surface will do you.

    Several HF members joined on a group buy of fabric-backed reflective blankets, successfully sold to hospitals for short-term and disposable use in cold diagnostic procedure rooms.

    Nobody was enthusiastic about the results, try as some did to make it work. Disappointment was best kept hidden with silence.

    If you wish to try anyway, punch a neat hole at what will be the low point of the under-hanging sheet, so condensate can drip out.

  9. #9
    New Member Tancrad's Avatar
    Join Date
    Apr 2011
    Location
    NS, Canada
    Hammock
    HH ULBP-A
    Tarp
    Stock HH
    Insulation
    Down/thermal tarp
    Suspension
    Stock HH Ridge
    Posts
    24
    i use the reuseable tarp/reflective blankets. fold it length wise and put it in between my UL HH and under kit. it worked amazing because its not pressed against your body especialy when you put next days clothes on top of it creates airspace.

    now i have a DL blackbird and its a bit different. i need to test out how to layer it properly but im still interested in functioning the same way.
    http://img857.imageshack.us/img857/8219/sige.th.png


    Bear Burito, but id have it no other way.

  10. #10
    New Member Slick's Avatar
    Join Date
    Aug 2012
    Location
    Jacksonville, FL
    Hammock
    the one I'm sleeping in
    Tarp
    Zpacks cuben asym
    Insulation
    EE TQ, DIY UQ
    Suspension
    DIY Whoopie slings
    Posts
    26
    Images
    3
    Quote Originally Posted by WetRivrRat View Post
    rather than go through that hassle - you could just try a reflective ripstop...
    DIYGearSupply.com has some - seems to function similarly, though I haven't had a chance to put it into field use yet, just around the house...
    @WetRiverRat - Have now, and it worked! Congratulations on a nice DIY project!

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
  •