Originally Posted by brokensheer
I have a mold for a 23' boat, I am thinking about building a 25'. my thoughts are to in the mold build a section from the transom forward say about three feet., pull it and then glass a section from the bow back almost to the transom. in the areas of the joint leave the glass light so I can add the additional when the two parts are joined. any thoughts?
Although I'm new to this forum I'm not new to the idea of stretching boats, having done two or three jobs much like you're proposing. Having the mold makes this project not only practical but should produce a satisfactory result.
Here are a couple of tricks that can make the job easier.
1) When laying up the first transom section hold back each succesive lay-up 3" to 6". This will allow you to bond in the transom using ever wider lay-ups thereby increasing your bond surface area.
2) Use this same lay-up schedule at the stern of your larger forward section.
3) Depending on the hull design you may need to cut along the chine line in order to smooth out the transition between the two pieces.
4) Blocking and realigning the two hull sections can be difficult...take your time and measure everything!
5) Consider saving one or two lay-ups for the newly stretched boat as a final tie in over the whole thing.
6) For me the hardest part has always been dealing with the gelcoat cosmetics at the joint. This should be at least slightly less difficult for you since you'll have the the correct gelcoat and pieces of the same age and weathering.