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Thread: Laying out glass cloth.
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19th May 2012, 11:53 PM #1Senior Member
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Laying out glass cloth.
I'm in the process of glassing the outside of the hull and I've layed the mat over the hull and smoothed it out working from the middle to the stems. Can anyone tell me, is there a special way of cutting or folding the cloth at the stems ? I saw a you tube video of a kayak being glassed but the cloth just layed neatly on the hull.
Thanks for any advice.
Kev.
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20th May 2012, 08:33 PM #2
There are a few approach you can take. The idea is to get it to lay down neatly, without puckers, wrinkles, etc.
Since you have enough fabric to cover both sides of the hull, in one bolt of fabric (that's cloth not mat BTW) the usual options are: cut it flush, so that each side just lands on the stem profile or to permit one side to over lap the other (stronger). If you cut it flush with the stem, you can come back and place a narrow strip over the stem later. If you elect to over lap, you'll have to make some "relief" cuts, so the fabric will lay down without puckers. About every 3" to 4" (75 to 100 mm) make a cut perpendicular to the stem, on the over lap material. Do this on both sides, but stagger the cut locations so they both don't land on the same spot of stem.
Do a dry run and bend the fabric around the corner, making sure it doesn't pucker. If it does, you need more relief cuts.
When you get around to doing the bow sections portion of the sheathing, let the wet out coat get really tacky, then use this to advantage when bend the fabric around the stem. Personally, I just cut it off flush and skip the hassle, then I come back once the sheathing wetout coat is in the gel stage, trim off any excess with a knife, then apply a strip of fabric, cut on a 45 degree bias, onto the stem.
Regular cloth (what you have there) has fiber orientation arranged at a 90 degree bias. This doesn't go around corners well, but if you cut the strip at a 45 degree bias, the fibers will cross the stem at this angle, making it a lot easy to manipulate (it's also stronger) around the stem. The reason I perfer this methid is it's a lot easier to fair it in and you can control the material better.
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21st May 2012, 03:52 AM #3Senior Member
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Thanks for the reply Par. I had allready wet out the cloth when I read your reply. I cut the cloth long and then up the middle and layed one side over the other. Where I had trouble was at the end of the cut where it met the stem. The cloth slipped all over the place just on the overlap. If I had waited for it to get tacky, like you suggested it wouldn't have been a problem, but it all worked out. I still might put a strip down the stems. You never know when we might have to get up to ramming speed to sort out a couple of these Rhine barges
Kev
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Attachment 209170
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21st May 2012, 09:17 AM #4
Looking good.
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21st May 2012, 11:06 AM #5
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