Prout 50 Sandwich

[tolly]

Do anyone of you know what core material it is on the fore deck sandwich construction of a Prout 50 from the 80:s?

I ask because I am going to watch one with a teak deck (???) on the fore deck and I'm quite concerned about the idea, mainly because of the leaking risk but also the performance loss.

What's your idea?

Rolf