hard bottom paint

Discussion in 'Boat Design' started by sailboatman, Jun 17, 2008.

  1. sailboatman
    Joined: Jun 2008
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    sailboatman Junior Member

    how many gals of hard bottom paint do i need to buy to paint the bottom of a 31 foot boat
  2. the1much
    Joined: Jul 2007
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    Location: maine

    the1much hippie dreams

    what kind of paint,,how much surface area,,how many coats,,1 gal for a 31' canoe,30 gal. for a 31' barge,,,hehe ;) ,,we needs LOTS more info,,,what kind of boat,,as always,,if ya ask a question,,,your gonna be asked 20,,hehe ;)
    welcome to the forum hehe ;)
  3. artemis
    Joined: Oct 2004
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    artemis Steamboater

    Most boat paint manufacturers will tell you the coverage of their paint "Our wonderful improved bottom paint will cover xx sq.ft." Same thing as on a house - figure out the square footage and go from there. Tape measures are flexible so you can measure "rounded objects. Figure out the surface area on one side of the keel and multiply by two. :idea:
  4. PAR
    Joined: Nov 2003
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    PAR Yacht Designer/Builder

    250 to 350 square feet of bottom per gallon, depending on manufacture.

  5. Greenseas2
    Joined: Mar 2006
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    Greenseas2 Senior Member

    Bottom paint

    A lot depends on how long between haul outs and also sailing or mooring conditions. On my 30 foot S2 center cockpit sloop, I put on two coats of hard bottom paint every February. One reason is that the boat is docked up a river not far from the ocean and accumulates the normal amount of marine growth that is removed by having a diver scrub the bottom monthly and therefore wear off some of the paint. The second reason is that we do a lot of cruising in areas with stirred up sandy bottoms that have an abrasive action on the bottom paint. 250 to 300 square feet per gallon sounds about right, but use the good stuff not the brand carried by Home Depot or other stores that have opened a "marine section" and push low quality marine products just to get your money.
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