CORE REPLACEMENT Do you get a squishy feeling when you are walking across the cockpit of your sailboat? or the deck of your center console fishing boat? The original deck material in most yachts is simply plywood, balsa or closed cell foam. When water and rain finds a loose bolt or a small crack in the existing fiberglass overlay and that's all it takes. Winter freeze conditions can also exasperate wet laminate schedules due to expansion weakening and expanding the area increasing the cost of such repairs. ATF offers free hull inspections, Get an expert's opinion for FREE! We will remove all the rotted wood or foam, replace it with resin core, and reface it with new fiberglass!! And the benefit is that it will never ever rot again!