Traditionally, butterfly hatches have protective metal bars over their glass. Helge's glass is made of Lexan. You can jump up and down on it without doing much harm. During my designing phase, I figured I didn't need these protective bars. Do you think the hatch looks naked without them? Perhaps in the future I'll have some cast bronze ones made similar to Mondego.
When the hatch is finally installed, its lower edge will be trimmed to match the interior's overhead.
Butterfly hatches are notorious leakers. Most sailors wouldn't want one over their bunk. To fight this leaking tradition, I placed a trough directly under the piano hinges to gutter the water away.
