What kind of plywood?

[Phillip Dyhr Hobbs]

I am going to build a Tiki 26 and trying to source the wood.

In the study guide it says 6mm ply WBP exterior, OR Marine ply.

I wrote to Wharram, and they say only use marine ply.

At 52 pound a piece from the uk (I am in Denmark)

http://www.robbins.co.uk/pdf/Marine_Pricelist.pdf

I think its really pushing my budget too far, 25 ound would be ok..

Whats your experience?

Can I use a good WBP thats well tested (I plan to boil it of course)

[kim whitmyre]

Marine ply is generally built to a higher grade, thus will last longer, all things being equal. Look for more plies per dimension: that will be the better sheet, all things being equal again. They all need to be encapsulated with epoxy/glass, no matter what.

[Ann and Neville Clement]

We agree with Jacques.  Ann and Nev

[Björn]

I would also look into already sheathed Coosa might be quite expensive but could save you a lot of work and epoxy cost and most importantly there a no future worries about rot if there is a scratch or dent, I used it now for quite some additions on the boat. you find more info at www.vonderlinden.de

[Phillip Dyhr Hobbs]

WOW

you guys are great!

Thankyou for the fast and helpful feedback,

Looks like its not if now, but what type and where I get it :)

@Björn

can you send me a link? my german isnt so good :)

[James Ryan davenport]

I have had good success with maranti marine grade ply. Make sure it is stamped 1088

[Björn]

I would not recommend Meranti, it is very brittle

@Philip, pls see link above, otherwise try to search for Coosa composites (http://www.coosacomposites.com) , BTW Boatsmith was using the stuff also for his Ariki build

[Phillip Dyhr Hobbs]

Hi Björn, 

I just took a look using google translate :)

Any idea of 6mm prices per sheet?

[Blanc Jean-Paul]

Hy
try to contact a manufacturer. you can negociate and obtain a good price. For example y obtain 50% on public price. Y have marine plywood for the price of interior plywood , and with garantee of loyds. Good luck

[Björn]

expensive, I would recommend to talk to vonderlinden and I would also suggest contacting Hanneke about it (although they might be reluctant of using something so modern)

[boatsmith]

We use a lot of Coosa board. I would not use Coosa for hull planking. No real reason it just doesn't seem right. I really like working in Okoume plywood. Good Douglass fir is my next choice but is harder to work with and finish. 

[Phillip Dyhr Hobbs]

Thanks so much for your advice guys, I will stick to play with plywood

I have worked with duflex before,
But I think something like that, a composite… Is just too expensive for such a project, and maybe even overkill, fair enough if I was sailing around the horn quite often

I will contact the manufacturers and try get a bulk discount, I have considered contacting Robbins in the UK as well to see if they do a bulk deal.

[Patrick John McGrath]

A big DON"T.  It's OK to put  a layer of Light glass cloth on the outside. But don't use polyester resin to bond the cloth.   Use only a good quality thin Epoxy.    If you do use polyester you will live to regret it.

Don't ask how I know. :(