Boundary Waters Quetico Forum :: Group Forum: Boat Builders and Repair :: Epoxy in screw holes?
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tumblehome |
I too should have been more thorough with my reply. I’ve built well over a hundred wood canoes and screwed the gunwales on every one. I use epoxy on the surface that meets the boat and countersink screws through the gunwales into the hull. Outwales go on first by driving a screw through the hull to the gunwale and inwales go on last. The inwale screw goes through the hull and into the outwale. I do fill the countersink holes with a wood plug of either the same species of wood as the gunwale or sometimes an alternating color of wood for a striking appearance. With that, I have never had an issue with rot. For me, I take good care of my canoes but I know a lot of people do not either because they are poor stewards of their canoes, ignorant to storage practices, or don’t have a place to store them out of the elements. Of all the gunwale issues I’ve seen out there, it’s the gunwales at the ends of the canoe where a canoe is flipped upside down on the earth for some time and the entire end of the canoe starts to rot where it rests in the dirt. I have also seen gunwales start to rot away when stored the same way outside above ground where the wood is not protected. However, the screw holes don’t seem to favor rot any more than the rest of the gunwale. Wood gunwales left wet for long periods will start to decay. Keep wood canoes dry and they last generations. As far as strength goes at a screw hole. All I can say is I have canoes with thousands of miles on them and the gunwales have never been a strength issue. Even when on the car zipping down the freeway at 75 mph. That canoes is flexing, twisting, rubbing, and trying to get way but never lets loose. Tom |
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1JimD |
The way a canoe is stored, or left on the ground with gunnels making ground contact, is highly detrimental. A Sin in my book. In those cases ? It doesn't matter how you mount your gunnels ! AMEN ! CabSauv is building a cedar stripper, and I would highly recommend, gluing, for the reasons I previously stated. That is his choice. I'm glad we were able to provide different options ! That's what makes this world go around. Jim |
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CabSauv |
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tumblehome |
Dip the threads of your screws in the epoxy before you drive them in. Your gunwales will rot if you leave your canoe outside in the elements and don't treat them with oil or varnish. Tom |
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sedges |
Screwing gunnel on allows for easier replacement for sure, But I don't think I will ever have to replace the glued ones if maintained properly. |
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1JimD |
Screw holes weaken a gunnel. rotten gunnel |
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CabSauv |
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CabSauv |
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1JimD |
tumblehome: "I don't agree that screw holes weaken gunwales I've replace several sets of gunnels. Some of them fell apart as I removed the screws. Where did they fall apart ? At the screw holes. Want more pics ? When you think of it, The only place a screw holds the gunnel tight to the hull ? Is at the threads of the screw. This gives water a lot of chance for rot. Gluing, holds the gunnel tight to the hull the full length of the gunnel, and seals out moisture . Keeping the gunnels dry is by any means the best way to preserve them. |
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1JimD |
The original poster didn't state what kind of hull he had. I should have asked that first ! There are instances, where it isn't practical glue gunnels. Royalex, and Wood Canvas, are two ! The last two sets of gunnels I replaced ? Where on Royalex hulls. In both cases, the hulls had been abused. Had the manufacturer used your method of coating screws, maybe they would have lasted longer ? Jim |