Hull/head liner in foam boats

Discussion in 'Fiberglass and Composite Boat Building' started by fallguy, Aug 30, 2018.

  1. fallguy
    Joined: Dec 2016
    Posts: 3,189
    Likes: 387, Points: 93, Legacy Rep: 10
    Location: usa

    fallguy Senior Member

    Anyone ever attach hull liner or head liner to a foam hull?

    If you want a wood strip to trim or hide edges, like on a ceiling, how do you attach the wood without involving screwing into the foam. An obvious thought is to glue a light say 3/8-1/2" thick unfinished batten to the hull; then glue or screw to it with a cap trim.

    Any other method? I thought about rabbeting the trim board for a single step, but any refinishing would have to be done on the boat vs a table.

    Then for a glue; any recommends? Any reason powergrab would be unwise?

    How smooth does the surface under need to be for 1/4" foam backed liner? Will a 8"-6"-6" tape seam need a pass of fairing compound to avoid showing?

    tia
     
  2. JamesG123
    Joined: Mar 2015
    Posts: 655
    Likes: 75, Points: 28, Legacy Rep: 10
    Location: Columbus, GA

    JamesG123 Senior Member

    Boats designed to have liners/interior trim will often have strips or blocks of wood (or whatever) of sufficient thickness bedded in and glassed over, sometimes as part of the main layup of the fabrication. Some will even have blind nuts or clips mounted. This has the added benefit of having an insulating effect and space for running cable and pipe out of sight but accessable.

    Laid up directly, contact cement will hold a liner permanently. In fact it is a real PITA to remove them. Lots of older/lower end boats will use this or beads of "liquid nails" cement. It all depends on if you ever want to be able to get behind it without having to replace the liner. It is good idea to have a few mechanical fixtures either fasteners or shelf/bracket to keep "peel" or "sag" from starting.

    They are quite tolerant of uneven surfaces. The only real hold up is if the structure surface shows thru a non-rigid liner.
     
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