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(You can also buy the glass with the mat already stitched in to the 1808 )
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18 stand's for 18oz per sqyd. The 08 stand's for 3/4oz per sqft.
A sqyd of 1808 weigh's 24 3/4oz.
That's what 1808 is. If you want Biaxle without mat a common number is 1700.
The use of extra mat with epoxy is a waste of good epoxy. the binder's don't relax right and it will eat up a ton of resign.
Mat is used to get good contact with the last layer laid. Like with the heavy Roven Woven's to fill the void's between the stranding.
1808 is available in +45/-45 and 0/90. This is the way the strands run. To maxumize strength you want to alternate the strand orentation.
You can cut the +45/-45 on a 45deg angle and lay it so it's 0/90. It's a little wastful with the material, but if the area is not so big and all you have is the +45/-45 it work's.
Mat is used for bulking the laminate up too. If you want to bulk it up, then why not add someting that has a whole bunch more strength. Like another layer of 1808. [img]/images/graemlins/wink.gif[/img]