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#1
posted to rec.boats.building
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Rebuilding 60 yr.old ceder runabout:
Hello boat people. I am trying to rebuild an old cedar lapstrake boat . It
is 16' L x 5',2" W withan small forward deck. I am an novice at this and would like some advice please. Some of the hull planks 3/8" cedar have longitudinal cracks and I would like to fill them with some type of compound not sure what to use. I understand lapstrake design are hard to rebuild as covering with cloth and epoxy are not recommended. Respectfully Ron |
#2
posted to rec.boats.building
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Rebuilding 60 yr.old ceder runabout:
sal wrote: Hello boat people. I am trying to rebuild an old cedar lapstrake boat . advice please. Some of the hull planks 3/8" cedar have longitudinal cracks and I would like to fill them with some type of compound not sure what to use. I understand lapstrake design are hard to rebuild as covering with cloth and epoxy are not recommended. Ron- I agree with your idea that covering with epoxy (and cloth) would be a bad idea for your cedar-strip boat. I understand your message to mean that the planks have split/cracked-not that the joints between the planks have opened up. Although I haven't repaired this problem in a boat, it's common in the guitar-building and repair hobby- another interest of mine. Usually there is dirt in the crack, which makes repair tricky. First thing is to get the humidity level up to near what the boat will experience once it is back in use- if the boat's been stored in a hot barn or similar, it will have dried out and that will have caused the cracking. If you fill the crack when the plank is very dry, it may cause problems later when the wood expands. The general approach I've used is to run a (thin) saw blade in the crack to clean it out and glue a thin piece of wood into the crack. I'd use polyurethane or epoxy glue for this, in a boat. Hopefully some other folks here will have more first-hand knowledge and the benefit of experience. Good luck with your repair project! John |
#3
posted to rec.boats.building
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Rebuilding 60 yr.old ceder runabout:
"John" wrote in message oups.com... sal wrote: Hello boat people. I am trying to rebuild an old cedar lapstrake boat . advice please. Some of the hull planks 3/8" cedar have longitudinal cracks and I would like to fill them with some type of compound not sure what to use. I understand lapstrake design are hard to rebuild as covering with cloth and epoxy are not recommended. Ron- I agree with your idea that covering with epoxy (and cloth) would be a bad idea for your cedar-strip boat. I understand your message to mean that the planks have split/cracked-not that the joints between the planks have opened up. Although I haven't repaired this problem in a boat, it's common in the guitar-building and repair hobby- another interest of mine. Usually there is dirt in the crack, which makes repair tricky. First thing is to get the humidity level up to near what the boat will experience once it is back in use- if the boat's been stored in a hot barn or similar, it will have dried out and that will have caused the cracking. If you fill the crack when the plank is very dry, it may cause problems later when the wood expands. The general approach I've used is to run a (thin) saw blade in the crack to clean it out and glue a thin piece of wood into the crack. I'd use polyurethane or epoxy glue for this, in a boat. John I would also use a polyurethane like Sikaflex for the larger cracks and use an epoxy like West Systems for the finer cracks. The polyurethane with allow movement, which you will need on the larger cracks and the epoxy will flow deeper into the smaller cracks. You may also want to consider if it is necessary to run a thin bead of polyurethane along the lap joins on the exterior of the hull. ...Ken |
#4
posted to rec.boats.building
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Rebuilding 60 yr.old ceder runabout:
On Sun, 10 Sep 2006 08:41:08 -0500, "sal" wrote:
Hello boat people. I am trying to rebuild an old cedar lapstrake boat . It is 16' L x 5',2" W withan small forward deck. I am an novice at this and would like some advice please. Some of the hull planks 3/8" cedar have longitudinal cracks and I would like to fill them with some type of compound not sure what to use. I understand lapstrake design are hard to rebuild as covering with cloth and epoxy are not recommended. I am a professional boatwright. My specialty is runabouts. Put boat in water, let it sink, and see if crack goes away. I probably will. |
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