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[quote=smfinley]I am not familiar with the Nacra 5.0, but the cracks near the beams are not surprising given the age.  When you push on the hulls, do the cracks flex or the beam flex in relation to the hull?  I agree the cracks in the left hull apear to be from a dock, maybe hit while on a trailer also.

If the cracks at the beam are also on the side of the hull it would be a good winter project to add a little glass to the inside of the hulls to strengthen that point.  Especially if you are towing kids etc behind the boat.  I would recommend West System epoxy, it is easy to work with and does a great job.  I repaired my hulls a couple year back with it and really liked the stuff, other people on here have talked good about it also.  My friend used it when building his airplane, so you know people trust the stuff.  Just make sure to sand the area well before first applying and then sand between each coat you apply.

If you have inside access, I would lay multiple layers of fiberglass cloth over the area.  First smaller pieces over the cracks, and then some longer strips to carry the load out for several inches past the cracks.

Great to hear you enjoyed your first summer on a cat.  Your boys are a great age for getting into sailing.  I was about 10 when my dad got a catamaran, and I got hooked.  Now 20+ years later still love it.[/quote]

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