Dave,

Neither fiberglass nor fabrics like Dynel® add significant strength and
the checking problem with BCX pine plywood is insignificant. Tape your
joints inside and out and paint with 100% acrylic latex exterior paint
of your preferred gloss. For more on this and other heresies see:
http://www.angelfire.com/nc3/davecarnell/

Dave Carnell

Dave Allyn wrote:

I am building a S&G canoe. I am going to use fiberglass cloth on the
entire outside for extra strength, and to prevent any checking in the
plywood. I'm useing 1/4" BCx plywood.

What weight of cloth would I want to use for this aplication? And the
next question, how would I decide that on future projects? Is there a
general rule of thumb for weight?

One last question, I know I need to tape the inside and outside with
fiberglass tape on the seams, but If I cover the whole outside with
cloth, do I still need the tape on the outside of the seams?

Thanks,

dave


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