Fiberglassing stringers

Here is the basic design of my stringers:



I've got 1.5 oz mats and as I was lying them down and cutting them to shape, i noticed that due to the long strands i was using, the mat were not lying flat in some sections and was worried that this may cause problems when glassing(bubbles?). Should i just cut the mats into thinner strips? If so whats the pattern i should maintain? (ie. slightly overlap, or do like a brick laying pattern)



Also, will two layers be sufficient enough? All i need is to keep the water away from the wood. I've glued the stringers in with special adhesive and there rock solid, so strength isn't an issue.

Thanks

Re: Fiberglassing stringers

Overlapping is fine. Blob on lots of resin in the area you're going to overlap and it'll work great.

Re: Fiberglassing stringers

thanks

How many layers do you recommend to protect the stringers from water damage?

Also, How many inch's of overlapping?