Just curious how old is your
boat?
Only reason I ask is to see how long the
plywood hatch lasted and is
plywood a viable option for the base of a new
hatch? Ply could
work, but when out in the
weather, will eventually
rot out again.
Don't know if you are handy, but you could make a new one.
I like the idea of a f/g base instead of ply, then glue your old
teak on top to maintain the appearance. Not too hard if you make a
mold out of thin ply and curved
wood to match the crown in your hatch. Apply a
mold release agent to the ply, then start laying in f/g and resin until you have a sufficient base for your hatch. (Make it a little larger than original size so you can cut it back to remove rough edges)
Can't see the
hardware for the slider portion, but most likely could reuse that
hardware then mount on the new f/g hatch. Clean up you old teak (remove glue/ply stuck to bottom) and glue on top of f/g.
Attached is a pic of a similar style sliding hatch that we built.