I would say glass on the inside is absolutely important. I cracked my stripped canoe a couple years back, on the inside and there was not a scratch on the outside near were the damage occured.

Jason

: Since fiberglass is strong in tension, is it structurally necessary to glass
: the inside of the hull, since this side of the "sandwich" should
: be in compression when the boat is floating? Apart from waterproofing the
: wood and using a glass layer for abrasion resistance in the cockpit area,
: I'm wondering if taping the seams (we're talking S&G here) isn't enough
: treatment for the remainder of the inside of the hull. I would think the
: deck should probably be glassed both sides, but maybe not. Am I missing
: something? I'm sure the group has already figured this out.

: Still in the planning stages and (truthfully) trying to get up the nerve to
: order plans (probably Cirrus).