Sailing Uma · video

What this video covers

The crew of the 45-ft catamaran *Uma* is rebuilding the cabin sole to provide full access to the bilge.0:18 They are installing 20mm marine plywood floorboards supported by a base structure bonded to the hull with epoxy and structural filler.0:30 To fill the irregular gaps between the new supports and the existing fiberglass hull, they are using a two-part, closed-cell polyurethane expanding foam.6:33 After applying the foam, they trim it flush to create a smooth surface for final fiberglass encapsulation, which ensures the wood remains waterproof in the bilge environment.10:55 The project also involves using a table saw to cut OSB templates and plywood panels, with the crew emphasizing safety techniques such as keeping hands away from the blade and using push sticks.20:21 The final design features removable floor panels secured with latches and pins to allow for complete bilge inspection and maintenance.30:13 Using expanding foam for non-structural void filling provides a lightweight, efficient alternative to heavy structural fillers.

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