Lap repair guide

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lap repair

Postby Darryl Siss » Sat Jun 09, 2012 7:05 am

I am in process of replacing few feet of lap on Grady White. Have friend who is doing. We have used your how to, which is great. However, he seems to think that because he cut each piece at the rib he does not need to do 4 inch scarf as you suggested because connection at rib will be strong enough. Any thoughts?
Darryl Siss
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Postby Phill Blank » Sat Jun 09, 2012 7:18 am


I would recommend a scarf joint even with the splice over a rib. There is not enough strength in a straight joint over a rib in plywood hulls.

With the joint scarfed you are making sure the plywood is as strong as it can possibly be and will take the flexing that the hull goes through out on the water at speed.

I would rather be safe then sorry when it come to being out on the water and running into rough water and have a seam break open.

GO with the scarf joint no mater where it might be located.

Good Luck,

Phill Blank
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Postby thegammas » Sun Jun 10, 2012 5:28 am

Totally agree with Phil. Even with my limited woodworking experience, I can say with a high degree of confidence those joints need to be scarfed.
Peter Stransky
1962 Cortland Custom Sea Lancer
Wilmington, Delaware
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Location: Wilmington, Delaware. - put wooden boat in the subject

Postby Torchie » Sun Jun 10, 2012 1:23 pm

The whole purpose of a scarf joint is for strength.When done correctly a scarf joint will be stronger than the wood around it.
Is it a PITA? Well it can be but as Phil pointed out, better safe than sorry.
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