Jan 24, 2012 at 1:29 am #1284591
I am currently trying to make my own bouldering mat from 1000d cordura. I am quite new to sewing and am teaching myself as I go (lots of trial and error!!).
I am just wondering that after I have sewn a seam should I trim of the excess material or do I leave it there or do I iron it down flat?
Also I am looking to double sew my seams, should I just sew directly over the first line of stitching or so you stitch a separate line close to the first?
Any advice appreciated.
garethJan 24, 2012 at 3:06 am #1828855
@sam-pangolinLocale: London, UK
Are you sewing it inside out? If there is a lot of excess then trim it a little, but particularly trim the corner quite close to the stitching. That makes for a neater, pointier corner once you turn it the right way out. Make sense?
I'm not sure about double stitching, I'll let someone else answer. I would think a second row would do nothing as all the force is on the first row?Jan 24, 2012 at 8:00 am #1828911
Jerry AdamsBPL Member
@retiredjerryLocale: Oregon and Washington
Good description of basic seams
also if you go up a level and then go to French Seams, that's another useful oneJan 24, 2012 at 8:46 am #1828935
Oddly enough, I was just thinking about this same project this morning, because my brother recently got me back into climbing and bouldering.
I think for your purposes a french seam, or something of the sorts, would be most useful. It should give your seams a good deal extra strength.
What are you going to use for the actual padding?Jan 24, 2012 at 9:09 am #1828943
@owareLocale: Steptoe Butte
Look up "top stitch". That will spread the force over two rows of stitching. If the raw
edge is inside the pad, you won't need a lap felled seam.
Look up notching the corners too.Jan 24, 2012 at 11:33 am #1829013
FYI, and to answer a question above:
Lots of the pad manufacturers sell replacement foam. I've never had to buy any, but know people who have. Some quick links, but I'm sure any company would sell you some:Jan 24, 2012 at 2:17 pm #1829089
a little weigh-in from another climber making his own gear:
i would go with a double line of stitching in a simple seam arrangement. French seams are for concealing the raw edges either 1) for aesthetic reasons (those frenchies and their style…) or 2) to prevent raveling, i.e., fraying of the edges where the individual threads of the fabric start to separate. In your case the seam is inside where it won't be seen, and you can prevent raveling by lightly searing your fabric edges with a candle.
likewise i think topstitching is unnecessary. in your case there is not a lot of tension perpendicular to your seam so you don't really need to distribute it across multiple rows of stitching.
personally i would use two lines of stitching separated by 1/8" or less. this way if the first row, which is indeed taking all of the stress on the seam, fails, there is a backup seam and you won't even notice the failure.
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