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Dynel Sheath over timber

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Created by Saltuarius > 9 months ago, 25 May 2019
Saltuarius
QLD, 47 posts
25 May 2019 5:26PM
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Hi Folks,
One of the yachts I am looking at is dynel sheath over timber. I have no experience with this at all. What sort of things should I be keeping an eye out for? Also, what would be the reason for sheathing?
Any advice greatly appreciated.

Cheers

troubadour
NSW, 334 posts
25 May 2019 5:34PM
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Look for soft spongy timber anywhere that fresh water can get in. Cabin sides, where the cabin side meet the deck, deck edge behind rubbing strips. Dynel is good for keeping the hull dry from the outside but if fresh water gets inside anywhere the timber could be like weetbix in milk.

Saltuarius
QLD, 47 posts
25 May 2019 5:44PM
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Select to expand quote
troubadour said..
Look for soft spongy timber anywhere that fresh water can get in.


Thanks Troubadour. Once I have had a look and a poke about I'll get it surveyed but it's good to know what to look for. If it's bad I probably won't need the survey eh.

lydia
1927 posts
25 May 2019 3:57PM
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Dynal is only there to increase thickness on the barrier coat ie usually epoxy to keep the water out
it has no real strength so any cracks means timber underneath is moving
which often means water in timber or can be timber not stiff enough hence movements
where cabin side join deck and cockpit floors often cracks due to movement not water

Saltuarius
QLD, 47 posts
25 May 2019 6:00PM
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lydia said..
any cracks means timber underneath is moving
which often means water in timber or can be timber not stiff enough hence movements
where cabin side join deck and cockpit floors often cracks due to movement not water



Excellent. Thanks lydia.

crewloose
NSW, 52 posts
25 May 2019 6:23PM
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Aside from the construction. A dynel-sheathed, or any, timber boat would not be an ideal first boat versus a plastic fantastic. My 2c.

Saltuarius
QLD, 47 posts
25 May 2019 6:39PM
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crewloose said..
Aside from the construction. A dynel-sheathed, or any, timber boat would not be an ideal first boat versus a plastic fantastic. My 2c.


Thanks crewloose. It won't be my first boat. I don't mind butter boxes but this one is just a little different

lydia
1927 posts
25 May 2019 4:58PM
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Check out the Defiance Thread in here and check the pics

ltimber boat sheathed in dynal and epoxy

Saltuarius
QLD, 47 posts
25 May 2019 7:27PM
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lydia said..
Check out the Defiance Thread in here and check the pics

ltimber boat sheathed in dynal and epoxy


Thanks lydia,

What a great post.

Cheers

woko
NSW, 1770 posts
25 May 2019 7:35PM
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As mentioned earlier there's stacks of GRP boats on The market and cheap.
A lot of carvel planked boats have been fibre glassed,( layed up with chopped matt and resin of your choice) that lessens the maintaince at the expense of adding more weight. But that's not Dynal that's more for cold moulded or ply, abrasion resistance and as Lydia said adding to the water proofing membrane thickness



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"Dynel Sheath over timber" started by Saltuarius