raw edge fiberglass tape vs selvage edged for stitch and glue boat

Discussion in 'Wooden Boat Building and Restoration' started by djusko, Jul 29, 2013.

  1. djusko
    Joined: Jul 2013
    Posts: 1
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: eastlake ohio

    djusko New Member

    Is it better to use manufactured fiberglass tape with the selvaged edge or cut your own and not have to deal with sanding the selvaged edge down?
  2. missinginaction
    Joined: Aug 2007
    Posts: 1,098
    Likes: 251, Points: 83, Legacy Rep: 512
    Location: New York

    missinginaction Senior Member

    The finished edge on the tape makes tabbing a lot neater and easier. I also use it often to reinforce seams. Whenever I use fiberglass cloth in a location that is going to be painted and finished smooth, I end up having to sand off the edges anyway as there is always a little ragged edge where the cloth ends.
  3. michael pierzga
    Joined: Dec 2008
    Posts: 4,862
    Likes: 115, Points: 0, Legacy Rep: 1180
    Location: spain

    michael pierzga Senior Member

    Difficult to cut your own tape.

    Edged tape leaves a little ridge. raw edge tape leaves stray fibers. Both have to be sanded off after cure. Its about the same work.

    Most stitch and glue ply boats specify 45 45 Biax for seams. Always purchase pre cut biax tapes.

    Selvage Edge is not an issue with biax and the cut edge stays tight..doesnt unravel when you work with it .

    Buy some...you will like it
  4. pauloman
    Joined: Jun 2010
    Posts: 268
    Likes: 10, Points: 18, Legacy Rep: 151
    Location: New Hampshire

    pauloman Epoxy Vendor

    the tape is cheap - say about $50 for a 3 or 4 inch wide roll 50 yards long. - generally 9 oz. I like 3 inch- two strips over lapping an inch or two over the actual 'seam/joint'.
  5. PAR
    Joined: Nov 2003
    Posts: 19,133
    Likes: 496, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

    Taped seams by their very nature, will need considerable effort to fair out, so the selvaged edge is a moot point. Frayed edges need just about as much attention, so it's coin flip really. The convenience of a roll of tape can't be ignored.

  6. michael pierzga
    Joined: Dec 2008
    Posts: 4,862
    Likes: 115, Points: 0, Legacy Rep: 1180
    Location: spain

    michael pierzga Senior Member

    And purchase a few meters of Peel Ply then practice.

    Peel ply is magic. It really helps control stray fibers and compacts the edge of the tape, laminate. A peel plied laminate requires much less sanding to hide the cloth edge.

    Well worth having some peel ply in your bag of tricks
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.