The quality of the fabric is important when choosing the right material and equally
important are the seams that hold the flysheet parts together to create the complete
tent. The optimal thread and sewing technique must be applied. We apply the flat fell-
seam, a sewing technique that makes the seams very durable. In order to give the thread a solid and thorough grip the flysheet is folded so that the seam consists of four layers of
silnylon flysheet that every stitch goes through..
The thread we apply is the Amann Rasant 75 WR thread from Germany. One of its
properties is that it expands when it becomes wet (an expansion thread). This means that
the holes in the flysheet where the thread has gone through will be tightened because the
thread expands and covers more of the hole thus makes it more waterproof. However, the
silnylon material is very elastic and can also withstand considerable stretching without being damaged. So the holes will also stretch and become less waterproof. That is why we think it is also important to seal the seams with a silicone mix to make sure the seams are 100% waterproof. The silicone mix will penetrate through the seam and strengthen it.
The size of the stitches are also carefully considered. Many wrongfully believe that the
denser the stitches are, the stronger the seam is. This is not correct and it is essential to find the right size. Are the holes too big, the seams will become weak. Are the holes too small
and dense there will be too many holes, which will make the flysheet weak in the seams.
Based on our experience we have decided on 10-12 stitches within a seam of 3 centimeter.
This is where you obtain the most resilient seam.