starboard isn't 'stiff' and, as expected, when it gets warm/hot it gets flexible. the longer the unsupported span the more problems. one thought is to use stiffeners, outside or inside, similar to how this, see picture named 'M17 teak ly with teak stiffeners.jpg' (a new set i've made for an M17 owner). or use marine ply and coat with epoxy and then many coats of varnish (to protect the epoxy from UV). see attached picture named 'M17 meranti ply epoxy and varnish no stiffeners.jpg'. this set is for my M17 #375. this setup will last for years and years. the epoxy & varnish marine ply replaces a older set protected using the same system (and was made using non-marine exterior grade plywood) that lasted 10+ years (even with much neglect). :: Dave Scobie :: former M15 owner #288 - http://www.freewebs.com/m15-name-scred :: M17 #375 SWEET PEA - http://www.m17-375.webs.com :: Sage 17 #1 - AIR BORN - http://sagemarine.us/sage_17.html :: Sage 15 sloop #001 - ASOLARE - http://sagemarine.us/sage_15.html :: SageCat #000 - SAGECAT - http://sagemarine.us/sagecat.html On Thu, Nov 30, 2017 at 7:33 AM, bownez@juno.com <bownez@juno.com> wrote:
Hello John,
I had the lowest dropboard constructed of Starboard for my M23. Rainwater would tend to pool slightly at the base causing delamination of a wood board. The M23 had a 3 piece setup. Worked great, go for it.....
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