PVC plywood?

Discussion in 'Fiberglass and Composite Boat Building' started by SummerSchool, Jul 19, 2021.

  1. SummerSchool
    Joined: Jul 2021
    Posts: 6
    Likes: 0, Points: 1
    Location: Maryland

    SummerSchool Junior Member

    I was looking for some opinions on using PVC plywood in place of marine plywood for a stitch and glue 15ft Gravey. I like the idea of the PVC being rot proof but question the stiffness and ability to make a good bond with fiberglass and epoxy. I have used this for an awning with good results by roughing up the PVC with 60 grit sand paper. However the awning does not get much movement and I’m not sure if I will get adequate stiffness and bond for the hull of a planning boat. Has anyone tried PVC plywood for this purpose?
    Thanks for and help.
     
  2. Mr Efficiency
    Joined: Oct 2010
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    Location: Australia

    Mr Efficiency Senior Member

    I am behind the times, what is PVC plywood ? a surface veneer over normal plywood ?
     
  3. bajansailor
    Joined: Oct 2007
    Posts: 2,296
    Likes: 776, Points: 113, Legacy Rep: 37
    Location: Barbados

    bajansailor Marine Surveyor

    Is this the Garvey that I posted a link to in your other thread
    15'-9" Jimbo AL - garvey hull with center console-boatdesign https://www.boatdesigns.com/15-9-Jimbo-AL-garvey-hull-with-center-console/products/126/

    Like Mr E, I am also behind the times and am intrigued as to what PVC plywood is?

    I have used 3/4" thick foam board that has a thin PVC laminate on each side (the kind that you might build kitchen cabinets with) to build a wheelchair ramp for a friend - I sheathed the topside with stitchmat and epoxy after sanding it first, and it has held up well now for almost 10 years, after being subjected to much abuse during this time.
     
  4. SummerSchool
    Joined: Jul 2021
    Posts: 6
    Likes: 0, Points: 1
    Location: Maryland

    SummerSchool Junior Member

  5. Mr Efficiency
    Joined: Oct 2010
    Posts: 10,304
    Likes: 997, Points: 113, Legacy Rep: 702
    Location: Australia

    Mr Efficiency Senior Member

    My advice would be to apply a highly technical test, buy a sheet of it, and a sheet of ply of the same weight, and compare the properties by supporting at both ends, and walk on them. Wear shoes !
     

  6. Blueknarr
    Joined: Aug 2017
    Posts: 1,220
    Likes: 285, Points: 83
    Location: Colorado

    Blueknarr Senior Member

    It is very similar in starboard.

    Non-structural
    Heavy and flexible
     
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