Question for you fiberglass gurus out there -- is there any disadvantage to using multiple layers of lighter cloth rather than one layer of thicker cloth?
For example, say the plans call for 3 layers of 10 oz cloth. What about using 2 layers of 12 oz and a final layer of 6 oz? Or just using 5 layers of 6 oz?
The reason I ask is because I have a good bit of cloth of unknown weight that was given to me. I measured the thickness at around 0.0085", so I'm guessing (according to the below chart) that it's 6 oz cloth. It actually is measuring closer to their value for S-glass rather than E-glass, but I would rather assume it's the weaker of the two. It was used for race car bodies where weight is a concern though, so it may actually be S-glass.
http://www.uscomposites.com/cloth.html
Any advice would be great, as this would potentially save me a significant amount of cash, and it would make the guy who gave it to me really happy to see it get used on a cool project. Also, the lighter cloth should lay out a little nicer, and would (in theory) require less compound to fill the weave. It would also be a nice bonus if it were S-glass, but I don't know if I'll ever figure that out.
Thanks guys -- also, I'll be using epoxy resin in case anyone is wondering.
For example, say the plans call for 3 layers of 10 oz cloth. What about using 2 layers of 12 oz and a final layer of 6 oz? Or just using 5 layers of 6 oz?
The reason I ask is because I have a good bit of cloth of unknown weight that was given to me. I measured the thickness at around 0.0085", so I'm guessing (according to the below chart) that it's 6 oz cloth. It actually is measuring closer to their value for S-glass rather than E-glass, but I would rather assume it's the weaker of the two. It was used for race car bodies where weight is a concern though, so it may actually be S-glass.
http://www.uscomposites.com/cloth.html
Any advice would be great, as this would potentially save me a significant amount of cash, and it would make the guy who gave it to me really happy to see it get used on a cool project. Also, the lighter cloth should lay out a little nicer, and would (in theory) require less compound to fill the weave. It would also be a nice bonus if it were S-glass, but I don't know if I'll ever figure that out.
Thanks guys -- also, I'll be using epoxy resin in case anyone is wondering.