what is the best way to protect wooden hull

[Igor]

We have a motoryacht made in Turkey. It's of 46 m length. The hull is made of wood (3-layer: 2cm of cedar of Lebanon, 2 cm of teak, 2 of cedar again.Then 3 layers of primer and 2 of painting. But this doesn't ensure watertight integrity . Because of increased moisture content vanish-and-paint layer has started separating and the wooden boat plating has start destroying.
What can you say about new technologies of protecting of the wooden hull from the contact with sea water?

[Buddy]

Now this is a BIG boat, 150 feet long and hull thickness of 2 3/8" inches! I take it that besides the paint lifing, you are finding that the individual wooden layers of the hull are separating from each other? How are they oriented, two on diagonals crosiing each other and the third running fore and aft? Were they just mechanically fastened or were they glued, maybe using a vacuum bag technique? What sort of glue? Are the problem areas below the waterline, and inside or outside the boat? It would help to get a better understanding of the nature of the problem first.

[Rosebud]

Also, what age is your boat? And what kind of fastenings are holding the planking?

[brad9798]

Perhaps length is lost in translation ... 46 FEET would be more likely for that hull thickness...

No new technology will fix bad wood ... the first thing you must do is determine the extent of the destruction/rot/separation ... Only then can you fix it.

Once your hull is stable and sound, you can consider more modern methods - cpes ... epoxy coatings, etc.

First things first, though.

Do you have any pictures of yacht?

Really, a solid hull to begin with only needs paint and scheduled maintenance ...

More info. please

[Igor]

the hull is carvel planking. It's made of three layers, each of 2 cm wide: interior is of teak, two outers is of cedar of Lebanon.Bulkheads are of steel.
We haven't hawled this yacht out so I don't have got any photo at the moment. I think of two possibility to repair: to overcoat with fiberglass or to use epoxy resins materials and technology. (Or it would be better just to caulk and to paint?) I've read about CPES that's seems to me to be interesting. But I can't find here these materials and equipment. Possibly I will need to buy abroad. What is better: epoxy resin coating or just caulk and paint/vanish?

[wolfietuk]

Igor,
There is no magic solution. If there is bad wood it must go. CPES is a fantastic sealer, which can harden some small punky spots. It can make a paint job last longer or help ensure a coating of resin and glass adhere better. A coat of resin and glass may not work for you. The carvel planking may have too much movement. That will cause a whole other debate here. But to use CPES or resin (stick with epoxy) The boat must be stripped to bare wood.

Good Luck
Rick

[Buddy]

You don't want to read my Russian, but you have said that the wood PLATING IS DESTROYING.

In ENGLISH, speaking of boats, hulls of wood can be PLANKED. Now metal parts say of bronze can have a nickel or chrome PLATING for appearance and protection that can deteriorate. Your hulls wood may have the PAINTING finish turning loose and the actual wood itself, its fastenings and caulking still being just fine.

We're trying to understand your problem/situation.
Are the wooden components coming apart some way? Are the wood fibers thenselves deteriorating?
Or, are the paint and varnish finishes cracking and peeling away?

Thanks for getting back to us.

[Lucky Luke]

Igor, I understand your hull is triple planking, but that is about all what I can guess.
There is much knowledge from people of this forum (I don't specially mean myself), and they are all eager to help.
English language mistakes is not a problem , but pictures will effectively help. Even pictures "in harbour" show a lot.
If you don't know how to post pictures here(it is a little "tricky"...), just send a mail in "Word" format, with the pictures -that's easy- to anyone who tells his personnal e-mail adress, and he will put them here for you and for others to comment.

[ 01-27-2004, 09:42 AM: Message edited by: Lucky Luke ]

[Jim H]

Originally posted by Igor:
the hull is carvel planking.Igor, fiberglassing a carvel planked hull is a bad idea. It's been discussed before here:

Glassing over a carvel planked hull? (http://media5.hypernet.com/cgi-bin/UBB/ultimatebb.cgi?ubb=get_topic;f=1;t=002783)

A topic that can now be found, among others, here:

WB FAQ Building and Repair, ver. 2.0 (http://media5.hypernet.com/cgi-bin/UBB/ultimatebb.cgi?ubb=get_topic&f=1&t=008298)

[ 01-27-2004, 06:02 PM: Message edited by: Jim Hillman ]