Re Deck

[mattaipan]

Hi There

Is it just the deck or does it go further? The deck is probably the first to go in terms of rot.

I would pull the decks off and replace with marine ply, Okoume or Gaboon Ply.

Don't have nightmares about it, it not necessarily a mountain your climbing, you would need I'm guessing 2 sheets of ply, some epoxy glue or resin with a glue additive and some light fibreglass cloth (to go over the main deck, between the beams) someone else can comment on whether that usually done with PT's.

I wouldn't bother going back to the bloke, maybe if I saw him again somewhere, I'd tell him, but now if you buy another boat in the future, you'll have that on your check list.

Regards

Matt

[ashm86]

Everything else seems sound, no soft spots in the hull. He had painted it with house paint and I do not think it was a waterproof coat.

I would have no idea where to purchase the plywood, let alone how to scarf it together. Can I just do butt joints? Off I go to find suppliers.

Andrew

[ashm86]

I found this retailer close to me. Here is a link:

http://209.250.155.182/noahs/AMAZING/items.asp?CartId={369E394A-7C68-41E5-BC7A-FF82FA756EVERESTC19}&Cc=OKOBS6566&iTpStatus=1&Tp=&Bc=

Can you tell me what thickness or which one to get.

Thanks,

Andrew

[mattaipan]

Hi Andrew

I'm guessing here, but for most off the catamarans 4mm would be fine for the job, that is what is on mine and most that I've owned/built, the BS 1088 grade I think would be best.

Scarfing is easy, and looks more difficult than it really is. Do a google search for scarfing plywood, there are quite a few different ways and jigs you can build using power tools and opposed to hand tools.

I'd just wait before doing to much, I'm not exactly sure how the PT decks are done, they could very well have butt joins underneath the beams.

Sorry I can help with the practical aspects, but I haven't actually built a PT.

I'll go now and try and fine a site for you that might help, I'll be back.

Regards

Matt

[mattaipan]

Hi Andrew

Theres a few pictures on the following site, www.geocities.com/phillbrander You can see in one picture the foredeck is on and the join looks to be, under the main beam, and if the distance from there to transom is longer than a sheet, the same could be done under the rear beam, again I'm not sure what join is used, hopefully someone else will help out with that question.

Can you see on yours what joins are used there originally?

Regards

Matt

[This message has been edited by mattaipan (edited 19 May 2007).]

[h20melon]

Hi guys,

As I mentioned in the other thread, photos of the rot would be good to look at so I can tell you what I would do with the problem.

I have just updated the Paper Tiger Photo site which is located at: http://photos.papertigercatamaran.org . Here you will find some photos of 4 boats being built. Probably the most comprehensive out of these is mine with the most photos. Hopefully these will give you an idea of building a tiger (and whats inside).

The ply that you will need is Gaboon or Gaboon/Mahogany (gaboon on the outside and mahogany on the inside - 3 ply), 4mm thick.

A scarfing link: http://www.naese.com/scarfing.htm Depending on where you will be joining the sheets together, you don't necessarily need to scarf the joins. For example, if you join under the beams where the beam pads are, scarfs are not necessary. The BS 1088 Marine grade ply is the best.

For best results, the top and bottom panels of the ply should run side to side rather than front to back.

re-decking is very easy, and is probably one of the easiest major repairs to do.

Let me know of your plans.

Neil

NSWPTCA

[This message has been edited by h20melon (edited 19 May 2007).]