Getting into light gear you will realize that a lot of gear is overpriced, or you might want specific features the commercial products don’t offer. But in my case I’m simply one of these DIY people, and I sewed a silnylon tarp.
As material I used silnylon, because it is cheap and does the job. I would prefer cuben….but the price :(
Hiking alone I don’t need a big tarp, but I want a luxury size. I already own a 3x4m tarp which is simply too big. 2,5x3 is also too big. I decided to cut the foot part half the size of the head part. The following image shows the final draft I used:<a href="http://www.krampenschiesser.de/wp-content/uploads/2010/05/tarp.jpg"><img class="alignnone size-full wp-image-88" title="tarp" src="http://www.krampenschiesser.de/wp-content/uploads/2010/05/tarp.jpg" alt="" width="810" height="559" /></a> The draft includes the seem allowance. This was transferred on a sheet of paper and then cut out of the silnylon.
One note on this: Cut the diagonal sides very straight or your tarp will sack and be difficult to pitch.
This is the difficult part. To make it easy for you: USE NEEDLES. I stichted my seams with needles every 5-10cm, otherwise my sewing machine will not transport the material correctly and I will have a lot of mess. The lap seem is quite easy, I used the tutorial from <a href="http://www.flusslinie.de/Bilder/Kappnaht.gif" target="_blank">http://www.flusslinie.de</a>; On the tieouts I used 3 layers of silnylon to secure the straps, this is bomb proof.
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create a pocket at each tieout to store the line when packing the tarp away. I will use one of the extra layer of material for this.
make the tieouts very short and use lines instead.