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How to sew the bottom onto a rolltop bag?


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Home Forums Gear Forums Make Your Own Gear How to sew the bottom onto a rolltop bag?

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  • #3638727
    Mike J
    BPL Member

    @mikejones3-2

    Locale: SoCal

    I am sewing my own rolltop backpack, and have it all thought out except the bottom? I have front, back, and side panels but not quite sure how to sew the bottom on?

    Any links you can point me towards? Preferably with pictures or video?

    #3638795
    Doug Coe
    BPL Member

    @sierradoug

    Locale: Bay Area, CA, USA

    Mike—Have you made a pack before? You know to sew everything together inside out, I assume. :)

    I’m working on one now, but mine is only two main pieces: back/bottom and side/front/side (which has fewer seams).

    I’d say: sew the sides to the back and front, then sew the bottom, starting at one point and going all the way around to where you started.

    #3638861
    Mike J
    BPL Member

    @mikejones3-2

    Locale: SoCal

    This is my first backpack! Yes I know to sew inside out!

     

    I was just looking for some visuals before I start sewing the bottom on.

    #3638881
    Matt
    BPL Member

    @mhr

    Locale: San Juan Mtns.

    I hope this quick sketch helps.  By far the easiest way to do a bottom that I’ve found – All straight, long stitches.

    BP Diagram

    Attach the 4 sides to the bottom piece.  Then bring the sides together and sew!  Done.  You can spare yourself a couple of seam lines if you cut the entire thing as one raw piece – but that can minimize fabric yield if supply or cost are issues.

    #3638884
    R
    Spectator

    @autox

    There are many ways to skin this cat.

    Here’s a detailed look at one of them: https://backpackinglight.com/make_your_own_gear_five_yards_to_sul_part_4/

    Matt – I hadn’t considered that before – good one.

    Mike – in my projects, I try to avoid sewing circular seams, which is what you describe, attaching the bottom as the last step.  I find it too easy to end up a little bit off on length, resulting in a small pleat one one side of the seam or the other when I get back around to where I started.

     

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