3 Most Popular Seams for Canvas


We get asked a lot about what type of seam is best for outdoor canvas projects. So let’s talk seams! We are going to walk you through the three most popular types of seams, discuss the benefits and potential drawbacks of each, and show you how to make them. Each seam is analyzed based on strength, water resistance, UV exposure, and fabric usage. Then, the choice is yours!

The Overlapping Seam: This is the simplest and easiest seam to make.

  • • 90% fabric strength
  • • Not as water-resistant
  • • Threads exposed to UV
  • • Efficient fabric usage (equal to seam width)

The Semi Flat Felled Seam:  This is a popular seam with professional canvas workers and provides a clean, finished look on the topside only.

  • • 95% fabric strength
  • • Excellent water resistance
  • • Only one stitch line exposed to UV
  • • Average fabric usage (2 times seam width)

The Full Flat Felled Seam: This is the most intricate seam and leaves no raw edges exposed. The Full Flat Felled Seam gives a finished edge on both sides of the fabric. To increase this seam’s UV resistance, sew a row of stiches after placing the fabrics together about one seam width away from the top raw edge. This step is not shown in the video.

  • • 100% fabric strength
  • • Nearly waterproof
  • • Threads exposed to UV
  • • Large fabric usage (3 times seam width)

Watch this video for step-by-step demonstrations of sewing each of these three seams.


What is your preferred type of seam? Find all your canvas and supplies for upcoming projects at www.sailrite.com

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