[stephen low]

Thanks guys, yes do realise I need waterproof glued ply and this is available in structural grade plys. Marine plys are far more expensive and given the fibreglass coating that will be applied, unecessary in this application.

I have a good mate that is a small dinghy builder and his was the suggestion on hoop pine but he can not shed any better species options.

However I do also know a marine surveyor so that is possibly the best place to start thanks for the reminder Rob.

Cheers guys and thanks

Steve