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Jan 19, 2008

Roof Coaming

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Changed direction again while I wait for a control boot to finish off the splash well.

I built up the roof coaming which runs across the rear edge of the main cabin roof. It's pupose is to prevent water from spilling off the roof onto passengers. It's also handy as a grab rail.

It is 1 1/4" wide at the base, 3/4" wide on the top edge and 1" high. I laid up 4 layers of 1/4" ply material and clamped and glued them into shape to create it. I used visqueen (plastic sheeting) to prevent actually gluing them to the roof yet. There is a 1/2" wide channel between the roof edge doublers and the coaming to allow water to run off when the boat is at rest.

Since the garge door opening at center is just a hair under 8' and as I calculate I will have 3" of clearance (accounting for 1" roller pipes) I don't dare to permanently attach the coaming yet.

Once the boat is outdoors I will permanently attach the coaming. For now it holds it's curve and is just sitting there until I later glue it down and lap a strip of glass up onto it.