Fiberglass over Foam Core

Discussion in 'Fiberglass and Composite Boat Building' started by HG Faulkner, Apr 5, 2023.

  1. HG Faulkner
    Joined: Jan 2023
    Posts: 1
    Likes: 0, Points: 1
    Location: Connecticut

    HG Faulkner New Member

    What are the thoughts on building a hull from foam and then glassing over it?
     
  2. BlueBell
    Joined: May 2017
    Posts: 2,756
    Likes: 999, Points: 113
    Location: Victoria BC Canada

    BlueBell . . . _ _ _ . . . _ _ _

    Welcome to the Forum HG.

    There are so many thoughts on this already on the Forum, just look in the Search window, upper right of your page.

    It is sound if done properly... but it's really challenging to do it properly.
    All stresses, forces, dynamic loading complications, everything must be accounted for.
    Not within the scope of most, especially on a custom, one-off design/build.

    Why do you ask?
     
    bajansailor likes this.
  3. bajansailor
    Joined: Oct 2007
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    Location: Barbados

    bajansailor Marine Surveyor

    And what type / design / size of foam sandwich hull would you like to build?
    Are you designing a boat yourself, or do you have a stock plan in mind?

    What is your experience so far of using fibreglass?
     

  4. fallguy
    Joined: Dec 2016
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    Location: usa

    fallguy Senior Member

    Done all the time. Stations must be close as foam does not self support. Or, you can glass one side of it, or strip glue.

    But to offer a better answer requires much more detail about the plan.

    The advantage of foam is generally weight. And weight is decreased using vacuum.

    Another issue is removing it from the jig can result in deformation after glassing; so sometimes it is preferable to build it on bulkheads as well. Or, build in a female jig and laminate the inside first and install bulkheads. But this is all generalized for the open ended question.
     
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