Glen-L.com

Hi I read all the comments on scarf joints with great intrest on all ways that diferent people do that job my son and I are both building boates he is building belle isle and I am building a riveria when he started his build I played around with scarf joints by glueing joints out of the same timber that we would be using with pva glue and letting them set properly and then bending them until they broke the timber awlays broke away from the joint the point I am making is always let your glue harden under the right conditons properly Old aussie

Thats a long sentence. But I am not quite sure where you are headed with this one. We normally do not use pva glues for scarfing plywood or even solid timbers together these days. The choice is usually thickened epoxy or rescorsinol glues.

I think his point is that even with PVA glue the joint is still stronger than the wood itself, which is the desired result. I use titebond III for scarves on my strip canoe and some other small boats in the past, and they all held just fine. If I were building a larger boat with the stresses of an inboard engine I'd probably use epoxy as Oyster suggests.



There, a little punctuation goes a long way (all in fun friend, no insult)

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I Peter 2:17

Epoxy , I mixed a batch of epoxy glue up to glue battons in, i put it in two containers to avoid it heating up , the same
as i have done before, i mixed saw dust to thicken it. only a few minutes had gone by and the epoxy started to bubble
and expand,what a mess I pulled the battons out and cleaned them off the best i could, i had epoxy on the floor on my
tools on my clothes in my hair ,the fun of boat building. The only thing that i could think off was that my saw dust was
contaminated with glue from the marine ply and it reacted with it , I made more saw dust out of the timber that i am using
and mixed up another batch, no problems . there was about 30 mm of epoxy in each container it expanded to fill them
to the top .

Old Aussie Peter,

only time i had that problem was i mixed a batch after i warmed the epoxy but not the catalysis

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Don't be afraid to attempt anything. You might surprise your self in the attempt.
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Modified Jubilee-"Wild Flower" 40' house boat
14' Mr John-Wild Flower 2
32' Supper Huck- Wild flower 3

Rod H

Every time I add sawdust to epoxy it seems to speed up the curing process much more than other fillers. I seldom use it unless its a really small batch and I'm going to use it all immediately after mixing.

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Tom
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Knot-So-Fast (A stretched Bo-Jest design)
Travel Log at www.tomstug.blogspot.com

"It's amazing what one can do when one doesn't know what one can't do." - Garfield

As soon as I mix it, I transfer to a more flat container so it's spread out instead of in a bulky mass

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Boat building can best be defined as an endless series of
tragedies obscured by the occasional miracle, followed by a good bottle of beer.

Don't Dream Your Life, Live Your Dream

Upspirate ,
You are spot on the money, it happened again ,I have used wider containers with no problems it has been very hot here
but spreading the epoxy out i get more time to work with it .


Thanks for the help .
Old Aussie Peter.

Also, on one of my builds, I had to keep the resin and hardener in a cooler on ice,and a metal baking pan was kept on ice to pour the mixed epoxy into to spread it out.....a cookie sheet works for a roller pan in this case

_________________
Boat building can best be defined as an endless series of
tragedies obscured by the occasional miracle, followed by a good bottle of beer.

Don't Dream Your Life, Live Your Dream