Hi all,
I have plans for a Spindrift 11 that I want to build and sail together with my eight-year old this summer. Never built or sailed a boat before, neither of us. We are yet waiting for warmer weather so we could finally start building the boat, nighttime temps are still around zero degrees (Celsius) over here, and not much higher by day.
So I've been looking for supplies in the meantime, found a supplier of good epoxy, but such plywood as stated in the plans is unavailable - the best I have found is "water-resistant" birch plywood, but I'm pretty sure it is not marine quality. My concern is that birch is roughly one-and-a-half times heavier than okume (plus, for some reason, it's 6.5 millimeter plywood everywhere, not 6), and given that it is not proper marine plywood, it will probably have to be sheathed in fiberglass on both sides, which will make the boat even heavier.
I've searched the forums and saw that using anything else except okume is frowned upon, but the alternative is usually fir plywood for some reason. So I wanted to know your opinion about birch. Do you think it would do to just fiberglass the outside of the boat - or maybe it is worth switching to thinner plywood? Any comments will be much appreciated.