Hull Repair

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WMegl
Posts: 128
Joined: Tue Nov 05, 2013 3:58 pm
Location: St. Louis, Missouri

Re: Hull Repair

Post by WMegl »

Let's try again. (I have tried all the suggestions for positng pictures and nothing works. Randy, I have tried what your have suggested several times with no success. Someone sent me a link to Photobucket and it only worked for the first picture. I think it's easier to build a cedar strip canoe than post pictures on the BMB's forum.)
My primary questions is should I overlap the new fiberglass patch onto the existing cloth. I am trying to make the repair as unnoticable as possible. Also, my sanding has been restricted to the side of bottom where the damage was. If I should be overlapping the new fiberglass cloth onto the existing, then I should be extending the cloth over the keel(centerline) which I have not done with my current patch.


I decided to try and replace the damaged wood from the outside without disturbing the inside. I figured if I failed, then I would simply continue preping for the repair on the inside as I did on the outside.

I continued to sand down to the wood and removed the damaged wood.

[ img]https://photos.app.goo.gl/9jUWL5p3dSm2yxY86[ /img]
[ img]https://photos.app.goo.gl/JHxVsoW5kty9GeoG9[ /img]
[ img]https://photos.app.goo.gl/AVf9ce9dP2wNVZAM9[ /img]
[ img]https://photos.app.goo.gl/QvCmwqFrJrEHMcg6A[ /img]

This picture shows from the inside shows how thin the remaining wood and inside fiberglass cloth and epoxy layer was.

[ img]https://photos.app.goo.gl/4jzAh5CmaE3jjNXZ6[ /img]

Then I made the wood repair piece and fit it to be proud of the surface for sanding to the level of the hull.

[ img]https://photos.app.goo.gl/DeqwYKnV3m6ry3Kp7[ /img]
[ img]https://photos.app.goo.gl/DjvYzid2afQbLfPK8[ /img]

Then, I heated up the hull and a batch of epoxy with my heat gun and gently pried open the wood from the interior epoxy/cloth layer and pushed the epoxy into the patch and cracks with a small artists brush. It worked- the fiberglass cloth that was visible on the inside of the damaged area shown in the picture below disappeared.

[ img]https://photos.app.goo.gl/u6g1BrqVGUvXQ2GeA[ /img]

Then I added some microfibers to the epoxy and brushed it on the damaged area and the cedar repair piece and glued it in.

Image

I've sanded the patch and cut a piece of fiberglass cloth to cover the area only where there is bare wood. It does not overlap onto existing fiberglass cloth.

[ img]https://photos.app.goo.gl/oGuLnQV8hNomxJEU9[ /img]
[ img]https://photos.app.goo.gl/rFNegK6nB9hL7KiT8[ /img]

My question is should the fiberglass cloth overlap onto existing cloth or not?

I think I have 3 options:

1. Use the cloth patch I have with an application of resin, let it dry, and add 2 more applications of resin as I did when fiberglassing the hull.
2. After this patch dries, add another fiberglass cloth patch which overlaps the first and existing fiberglass cloth and then apply one or 2 additional layers of resin.
3. Cut a fiberglass cloth patch now that overlaps onto the existing cloth and then add 2 layers of resin.

Thanks for your suggestioins.
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Cruiser
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Joined: Sat Apr 27, 2013 10:21 am
Location: Bowmanville, Ontario

Re: Hull Repair

Post by Cruiser »

First ... I think you have done a first rate job so far.

As far as the patch, I would cut something just a little bigger than what you have and I would make it a bit more regular shape, say an elongated oval.

Apply the patch, allow to get to the recoat stage and do the first fill coat ... let this firm up enough to feather the edges, light sand the whole thing and apply a final coat of epoxy, try to keep the edge where the epoxy ends very light.

After the epoxy is fully cured, light sand and put a few coats of varnish on. Again, stagger the coats ... first coat covers all of the patch and maybe and inch beyond, second coat an additional inch and so on ... this will avoid a sharp step where 3 coats or so of varnish end ... this way it is stepped and each coat gets a light sand so the initial steps disappear.

The reason I suggest a larger patch, is simply to give a solid overlap to maximize stress transferal ... the overlap is what connects the patched area to the rest of the hull. I suggest a regular shape is to make the feathering operation easier ....

Also for cutting FG I have found the absolutely best cut is from a rotary cutter (think sewing), gives a clean smooth edge with one pass .... you would need to set that blade aside though (to be used for FG) as it won't be good for cloth after you cut FG ... but it is very slick.


Brian
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Cruiser
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Location: Bowmanville, Ontario

Re: Hull Repair

Post by Cruiser »

Wayne,
I use these steps to post pics from Google Photos, we'll assume BM forums

- sign in to the forums
- sign in to Google photos
- you now have 2 tabs open on your browser

- open the post window for the forums
- click on the Google tab and navigate to the picture you want to post and left click the photo (this will open the pic ... it will be open large and the only thing on your screen, with the little arrow in the upper left to allow you to return to the rest of your pics)
- right click the photo and select "Copy Image Location"
- select the BM tab, got the post and either hit Ctrl V or right click and select "Paste"
- you can add the IMG /IMG with square brackets manually or use the BM button and drop the link between

When you preview the post the picture should show, not the link.

I compared my links with yours and they look completely different, gut feel is you don't seem to be picking "Copy Image select" ... not the only way to do this, but this way gets around image size restrictions on some sites and it does work fine.

Brian
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Patricks Dad
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Location: Warrenville, Illinois

Re: Hull Repair

Post by Patricks Dad »

Brian is correct. Your image link needs to be a link to the image itself. If you click on the links in your post above, you don't get to the image, you get to a page that contains the image. From there, click on the image itself (which will show a page with just the image) and then you can right click on the image to capture the address of the image (another link). Insert that link into between the img /img construct (without any additional spaces) and you will get your images in your post.

Here's one of them.

Image
Randy Pfeifer
(847) 341-0618
Randy.Pfeifer1@gmail.com
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WMegl
Posts: 128
Joined: Tue Nov 05, 2013 3:58 pm
Location: St. Louis, Missouri

Re: Hull Repair

Post by WMegl »

Randy and Brian: Thank you very much for your help and patience.

You have answered my question regarding the patch- I need some overlap. I was about to epoxy the patch on and it struck me that I would not have a continuous layer of fiberglass with my smaller patch. This didn't make sense unless I applied a second, larger cloth patch. This would have made a larger "bulge" and make the patch more noticeable which I was trying to avoid. I'm glad I stopped and consulted you.

Thanks again.
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WMegl
Posts: 128
Joined: Tue Nov 05, 2013 3:58 pm
Location: St. Louis, Missouri

Re: Hull Repair

Post by WMegl »

Here's my lates attempt to post pictures in the post with the help of my son(who is under 30), Randy, and Brian.

Image

Image

Tomorrow, Brian, I am going to apply the epoxy per your directions. Our kitchen needs a pizza cutter. I sharpened the one in the picture and it cut the fiberglass cloth easily.

Thanks again.
First Timer
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WMegl
Posts: 128
Joined: Tue Nov 05, 2013 3:58 pm
Location: St. Louis, Missouri

Re: Hull Repair

Post by WMegl »

I have completed the repair and applied the final coat of varnish. The repair is invisible from a surface view- it's perfectly blended into the surrounding hull. The only evidence of the repair is the ability to see the repair piece.

On the inside, because I did not break the fiberglass cloth and resin layer when I removed the damaged cedar strip, the repair is invisible.

Thank you Randy, Brian, and Jim.

Image

Image

Image
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Cruiser
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Location: Bowmanville, Ontario

Re: Hull Repair

Post by Cruiser »

Images still aren't showing ...but welcome if anything posted helped
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WMegl
Posts: 128
Joined: Tue Nov 05, 2013 3:58 pm
Location: St. Louis, Missouri

Re: Hull Repair

Post by WMegl »

Brian: Interesting the pictures aren't showing. They appear in my preview. And, I switched from Google Photos to Dropbox.
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Jim Dodd
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Location: Iowa

Re: Hull Repair

Post by Jim Dodd »

I can view the pics at the top of page 3, if I click on each link one at a time.
No luck seeing pics on your last post, even if I click on the image sign.
Jim
Keep your paddle wet and your seat dry!
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WMegl
Posts: 128
Joined: Tue Nov 05, 2013 3:58 pm
Location: St. Louis, Missouri

Re: Hull Repair

Post by WMegl »

Jim: I can see the pictures when I log into the forum and open the post.
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Jim Dodd
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Joined: Wed Feb 08, 2006 11:08 pm
Location: Iowa

Re: Hull Repair

Post by Jim Dodd »

No pics.
The link shows up. I click on it, but it states it's empty.

When I post. I click between the img boxes.


Again I use Photobucket. It has more than it's share of problems

I'll give you credit for keep on tying ! Hang in there !

Jim
Keep your paddle wet and your seat dry!
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