Waterproof sailboat cover

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Sewing
• A lock stitch machine with a walking foot is ideal for hemming.
• For seaming and hemming the top thread should be a PTFE or solution-dyed polyester thread of a size comparable to Tex 138 or 12 for larger applications. Use a PTFE or solution-dyed polyester comparable to Tex 9/16 for standard-size tops and covers. Use light to medium tension on both top and bottom thread.
• Lock stitch machines should use the same size thread for the bobbin as for the top stitch.
• We recommend 4.5 to 5 stitches per inch for awning and marine applications.
• Use a size 22 needle with size or 138/12 solution-dyed polyester thread or comparable PTFE on lock stitch machine.
• For chain stitch machines (when joining awning/canopy panels) use a Tex 138/12 thread (or comparable) and 0.60 needle. For size 92/16 thread use a #18 or .054 needle.
• It is always recommended to use the smallest size needle with which the machine will stitch properly. Inspect and change needles for best results. Thread breakage is often related to a burr in the needle and not necessarily the size of the needle itself.
• For marine work, more commonly an R (regular round point),
RG (round point, rounded tip) or FFG (light ball point) needle would be used. If when using an R point you notice that you are puncturing/cutting some of the warp or fill yarns in the fabric
you may consider changing to an RG, FFG or other ball point needle. The ball point will tend to