Tough, Versatile Coosa Board Suited for Various Projects


Cosa board is a closed cell panel that is reinforced with glass fiber, giving it both shear strength and compression strength. Compared to the most common balsa, foam, or plywood cores used in boat construction, it better resists moisture.

    1. Even at nearly proof load, Coosa Marine 26 resists compression exceptionally well. Note the glass fibers on the surface and the glass cloth layers just under the surface.
    2. As with all cores, failure is indicated by the fender washer bending. Use extra-wide fender washers or backing plates to prevent failure.
    3. Stiffening and reinforcing boat transoms is the one of the most common boat-building applications for Coosa board.
    4. Coosa board bonded to the hull creates lightweight and water-resistant panel for mounting accessories without drilling holes in the boat.




Related post: The Multipurpose Core


Darrell Nicholson, editor of Practical Sailor, grew up boating on Miami’s Biscayne Bay on everything from prams to Morgan ketches. Two years out of Emory University, after a brief stint as a sportswriter, he set out from Miami aboard a 60-year-old wooden William Atkin ketch named Tosca. For 10 years, he and writer-photographer Theresa Gibbons explored the Caribbean, crossed the Pacific, and cruised Southeast Asia aboard Tosca, working along the way as journalists and documenting their adventures for various travel and sailing publications, including Cruising World, Sail, Sailing, Cruising Helmsman, and Sailing World. Upon his return to land life, Darrell became the associate editor, then senior editor at Cruising World magazine, where he worked for five years. Before taking on the editor’s position at Practical Sailor, Darrell was the editor of Offshore magazine, a boating-lifestyle magazine serving the New England area. Darrell has won multiple awards from Boating Writer’s International, including the Monk Farnham award for editorial excellence. He holds a U.S. Coast Guard 100-ton Master license and has worked as a harbor pilot and skippered a variety of commercial charter boats.


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