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In S&G, the idea is to totally encapsulate the wood, keeping all moisture out. One uses glue only, no screws/nails that would let moisture in and bring on the rot. Framed boats do use metal fasteners, but they are designed to breathe, and let moisture out, thereby avoiding the rot.
So the potential problem is that by glassing and using metal fasteners, you are allowing moisture in (screw holes) and making it more difficult for it to escape (glass).
Having said that, I just picked up a very neglected framed boat that I think I'm going to reinforce with glass, then oil the shit out of the inside and hope it breathes through the inside.
my S&G build pics: https://picasaweb.google.com/jwpeak2001peak/Boat#
If you haven't already, search "whitewater" and "Briggs" on here and you'll find more info than you want...
Jeff, so you think I will run into problems in the long run glassing/epoxying and using screws? I am some what worried about durability if I do not use glass, but as I have stated I am new to this. I was planning on glassing the inside and outside and coating all exposed parts in epoxy. BUT if it would be better to just oil then its not to late for me to switch tacktics... Almost ordered epoxy and glass today, but I guess ill wait and think on it for a bit longer.
So my concern is that without glassing and using epoxy my boat will lack straingth , but if I do use glass and it ends up rotting out the wood then that is not good eigther. Help!!!
Ben, One option if you are going to glass and use frames is to drill pilot holes where your screws are going to go, I use a tapered drill bit with a built in counter sink. Then put a small dab of 5200 on the screw, drive it home and just clean up the squeeze out. If your going to paint the outside all the screws there will be faired with thickened epoxy and painted, so no worries. On the inside the 5200 will seal the screw in and not allow any water to get to the wood.
There are probably many ways to do this.
scott
One comment about water damage. Our driftboats/dories are a bit different then a speed boat which might float in a dock slip all season. We float, load up and trailer back home. The boats doen really sit in water 24 hours a day for weeks and here in the west with 10 percent humidity our boat get a chance to dry out a bit. My first all wood stitch and glue boat is almost 10 years old. No sign of rot anywhere. You just need to look at it once and a while. If there is a big cut in the bottom let it dry and patch it. If you smash a rock check it out after the trip. For most who get on the river 20 days a season rot is just not going to be an issue. It might be a bit more likely for a guide who works 6 days a week in fishing season.
As for strength, glass adds stiffness but most of the strength is in the plywood. I would not recommend building a whitewater boat with a 3/8 bottom. As I said before with frameless stitch and glue we don't use any screws. I would still think even without fiberglass, any screws are a point where water can migrate into wood and start problems. They need to be checked.
Framed with only oil and paint or fully glassed I wouldn't worry about rot issues if you spend just a little time checking things out and patching when needed. Don't let the boat sit around filled with dead leaves filled with rain water.
The main reason I don't like frames is that I like the smooth lines in side not having all of them.
Alright, so what I have gotten from this post is you can really do what ever you want to do, and as long as you think it through and take the time and care to maintain your craft it will most likly turn out alright. And I guess thats how it should be since we are all taking the time to build our own boats and not just buying one.
Thank you all again for all the advise. I look forward to continuing on with this extreamly helpfull fourm, and who knows maybe one day I will be the one answering all the questions rather then asking.
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