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  1. #1
    Senior Member hammock_monk's Avatar
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    DIY Full-Length Underquilt: Step by Step

    Intro: I am starting a DIY underquilt. I know there are many threads about this on the forums, and videos abound, but somehow they don't seem comprehensive to me. So, forgive me if another thread seems redundant, but I hope to create a thorough guide, start to finish. I hope you'll help me along, every step of the way.

    Goal: Production of two down underquilts--one for me and another for my son--full length and able to provide comfort down to 20 degrees.

    Tools: Google Sketchup for planning and design, photos and possibly video for documentation/feedback, and an old Singer sewing machine. I have done some sewing in the past and consider myself competent but a novice.

    Planning: Having done some research, I have put together what is essentially a 3D pattern in sketchup. I have exported it as a photo but the 600 pixel limit in the HF gallery makes it not very useful. So I have attached the higher res for easier reading. (Let me know if there is a better way to do this.)

    I have designed the UQ for 48" x 78" finished dimensions, with 2 1/2" baffles and 1 1/2" seam allowance. Inner layer is 40" finished width so I have made four 2" darts in the outer layer so that my material widths on the end seam will match. Not sure yet about suspension and how to add that to my plan but, at the moment, I am thinking that I'll have grommets or loops at corners and middle of long seam, with lines going up to attach to my ridgeline.

    My next stage will be a discussion of materials but I'd love to get some feedback on my plan first. I expect to expand and modify my plan before moving on to the materials stage.

    Thanks for your patience, encouragement and suggestions.

    UPDATE: Revised design--new drawings appear further down in thread. The drawing attached here has been changed.
    Attached Images Attached Images
    Last edited by hammock_monk; 10-15-2012 at 23:52. Reason: Update

  2. #2
    Senior Member Lost_Biker's Avatar
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    Have you used the calculator by CatSlpat? http://www.hammockforums.net/forum/s...ad.php?t=53701 It will give you accurate measurements. I would recommend 1.1 DWR ripstop for the inner and outer shells.

    Your plan looks good! It's pretty much the same dimensions as my down uq. The Lieghlo type suspension is worth looking into. It's the combination of several types and works great.
    Last edited by Lost_Biker; 10-14-2012 at 14:33. Reason: Hulk sad - not know how to type - fingers too big!

  3. #3
    thats a really good picture you did.

  4. #4
    Senior Member hammock_monk's Avatar
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    Lost_Biker,
    What is the Lieghlo suspension? Can you point me to a description or describe it yourself?

  5. #5
    Senior Member WV's Avatar
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    Maybe a bit more than a 3" difference in length between the two layers to allow for lengthwise curve? You'd need some side pleats, too.

  6. #6
    Senior Member Lost_Biker's Avatar
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    Quote Originally Posted by hammock_monk View Post
    Lost_Biker,
    What is the Lieghlo suspension? Can you point me to a description or describe it yourself?
    A video is worth ......well, quite a few words I believe.

    http://www.hammockquilts.com/apps/vi...ilt-suspension

  7. #7
    Senior Member hammock_monk's Avatar
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    I have run my specs throught CatSplat's spreadsheet and it looks really good. If I go with 750 fp down I'll end up with an estimated total weight of 13.67 oz of down, 22 oz total quilt weight, excluding suspension. And that results in an estimated 8 degree quilt.

    I am putting together an animated view of the design. Will try to post by tomorrow.

  8. #8
    Senior Member Lost_Biker's Avatar
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    Quote Originally Posted by hammock_monk View Post
    I have run my specs throught CatSplat's spreadsheet and it looks really good. If I go with 750 fp down I'll end up with an estimated total weight of 13.67 oz of down, 22 oz total quilt weight, excluding suspension. And that results in an estimated 8 degree quilt.

    I am putting together an animated view of the design. Will try to post by tomorrow.
    Looking forward to it.

  9. #9
    Senior Member hammock_monk's Avatar
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    Okay, I have not heard much feedback about my basic design but I'm going to take that as a positive sign. My data matches the CatSplat spreadsheet well. I'm going to move on to consider materials next, but first take a look at a 3d flyaround of the design:



    Oh, one other question about design. I will not have draft collars on the ends of the quilt. I think I will have a suspension somewhat like the Leighlo, though I plan to connect the corners of the UQ to prussiks on my ridgeline. Do you think it'd be a good idea to run the cord through end channels on the UQ to be able to cinch the ends down, rather than just connect at the corners? (I will not have side channels as I won't need to adjust the full-length UQ back and forth.)
    Last edited by hammock_monk; 10-15-2012 at 15:37.

  10. #10
    Senior Member hammock_monk's Avatar
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    Quote Originally Posted by WV View Post
    Maybe a bit more than a 3" difference in length between the two layers to allow for lengthwise curve? You'd need some side pleats, too.
    I am planning straight sides of equal length; is that a mistake? If not, I don't see why pleats are needed.

    I think the three inches you refer to is the 78" body versus 81" to include seam allowances.
    Last edited by hammock_monk; 10-15-2012 at 16:07.

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