{"id":1345,"date":"2021-09-09T14:06:34","date_gmt":"2021-09-09T14:06:34","guid":{"rendered":"http:\/\/www.talesfromtheboatshed.com\/?p=1345"},"modified":"2021-09-09T14:06:34","modified_gmt":"2021-09-09T14:06:34","slug":"repairs-already","status":"publish","type":"post","link":"https:\/\/www.talesfromtheboatshed.com\/?p=1345","title":{"rendered":"Repairs … already?!"},"content":{"rendered":"\n

As mentioned in my previous post, the aft section of the keel and the integrated deadwood has some checks (splits), resulting from the seasoning (drying out) process.<\/p>\n\n\n\n

Having pondered for some weeks, whether to simply use epoxy\/other filler, or to do a formal repair, I finally resolved to do the latter. Firstly, because it will probably be more effective and longer lasting; secondly, because is a lot easier to do it now, rather than after I have attached the hog to the keel – let alone after I have planked the boat! <\/p>\n\n\n\n

A Dutchman’s repair – or “Dutchman” for short – is also known as a Graving or Graving Piece, which again may be corrupted to “gravy bit.” Why have just one term, when a few synonyms will do?! <\/p>\n\n\n\n

This technique is used to repair a defect due to rot, split, or a knot in the timber. A piece of matching wood is cut in a diamond or coffin shape, with a very fine bevel, then placed over the defect.<\/p>\n\n\n\n

Here’s one I did earlier, during my IBTC course, repairing a defect in a keel, involving a knot. The knot extended right through the keel, so I did the repair on one side, and another student did t’other.<\/p>\n\n\n\n

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A keel in need of repairs!<\/figcaption><\/figure>\n\n\n\n
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This knot should probably have been repaired when she was built.<\/figcaption><\/figure>\n\n\n\n
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A graving piece is cut and placed on the keel, …<\/figcaption><\/figure>\n\n\n\n
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… and the corresponding recess is marked and chiselled out.<\/figcaption><\/figure>\n\n\n\n
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Some deeper holes were plugged.<\/figcaption><\/figure>\n\n\n\n
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A two-layer repair was needed.<\/figcaption><\/figure>\n\n\n\n
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Here is the outer graving piece, …<\/figcaption><\/figure>\n\n\n\n
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… glued in place, …<\/figcaption><\/figure>\n\n\n\n
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… screwed, and plugged, …<\/figcaption><\/figure>\n\n\n\n
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… and planed flush to give the finished repair.<\/figcaption><\/figure>\n\n\n\n

The current repair is smaller in extent and less complicated. However, there’s rather more at stake!<\/p>\n\n\n\n

Generally, I eschew electric routers, because they are noisy and produce a lot of dust; and because they are not without risk – especially to the workpiece. However, for this job – cutting a shallow straight-sided flat-based groove – an electric router is otherwise the ideal tool. So, with careful planning and measuring; checking and re-checking the clamping and guide fence, I set about my dutchman repair(s).<\/p>\n\n\n\n

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There are two significant surface checks (splits) on one side of the one-piece keel\/deadwood.<\/figcaption><\/figure>\n\n\n\n
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This view shows their depths.<\/figcaption><\/figure>\n\n\n\n
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With a length of softwood, clamped firmly to serve as a fence, I used a 9mm router bit to cut the recess. The recess was deepened progressively, to aid control of the router.<\/figcaption><\/figure>\n\n\n\n
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To make the second recess a little wider, I used a ruler as a shim, once I had cut the initial groove.<\/figcaption><\/figure>\n\n\n\n
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After roughening the surfaces with 60 grit paper, it was on to the glue up, using Collano Semparoc 60 Polyurethane adhesive. It is waterproof, very strong, and better than epoxy for oak. <\/figcaption><\/figure>\n\n\n\n
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Unclamped and ready to trim level.<\/figcaption><\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n
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With the repair completed, it’s time to clamp the hog back onto the keel\/deadwood, while I get back to work on the transom.<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"

As mentioned in my previous post, the aft section of the keel and the integrated deadwood has some checks (splits), resulting from the seasoning (drying out) process. Having pondered for some weeks, whether to simply use epoxy\/other filler, or to do a formal repair, I finally resolved to do the latter. Firstly, because it will…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","footnotes":""},"categories":[2],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.talesfromtheboatshed.com\/index.php?rest_route=\/wp\/v2\/posts\/1345"}],"collection":[{"href":"https:\/\/www.talesfromtheboatshed.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.talesfromtheboatshed.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.talesfromtheboatshed.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.talesfromtheboatshed.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1345"}],"version-history":[{"count":0,"href":"https:\/\/www.talesfromtheboatshed.com\/index.php?rest_route=\/wp\/v2\/posts\/1345\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.talesfromtheboatshed.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1345"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.talesfromtheboatshed.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1345"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.talesfromtheboatshed.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1345"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}