Glassing and bonding question

Discussion in 'Boat Yard Basics' started by Bush_Whacker, Apr 13, 2011.

  1. Bush_Whacker

    Bush_Whacker I Love microskiff.com!

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    I'm starting to do work on a skiff I picked up a couple months
    ago and I want to make sure I have things figured out before I
    start the epoxy work.

    Pictured below is what I'm starting on - the front deck.
    What I'm thinking is...
    - Coating all 2x's plywood with epoxy resin.
    (Do I let it totally cure before proceeding? If so, do I need
    to sand any mating areas?)
    - Finish sanding areas where 2x's are to be bonded to boat.
    - Bed 2x's in thickened epoxy, fillet, then glass to hull and
    each other(in one step?).
    (Again.....let cure?)
    - Bond ply in thickened epoxy, weigh it down, filet,
    then glass with 3" 6oz. along the sides. (All at once?)
    - After curing, glass whole deck with 6 oz. mat.

    I still have the upright panel to cut. It will have two squared
    holes on either side of the still existing seat mount.

    This deck is 48" at the widest, and about 60" long. Any
    idea on how much epoxy I will need for this?

    Thanks for any advice and input.


    [​IMG]

    [​IMG]
     
  2. jasonrl23

    jasonrl23 Plays with Glass...

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    1st coat you let cure.  This is your sealing coat.   Then sand and apply a second coat.  This is your bonding coat and hopefully you wont sand through your sealing coat. Then sand with 60 grit paper or less for bonding.


    Bed in epoxy, let it cure.  Fillet, let that cure, then sand with 60 grit or less paper and apply glass over your fillets.

    Same as above for bedding/fillets, only you can do your seams and deck all in one step.

    To answer this question we need to know the weight glass youre using.  If youre using 10oz plain weave, then that means it will consume 10oz of resin per square yard.  This will give you a 50/50 resin/glass ratio.  For a wet layup, 50/50 isnt bad at all.

    On the other hand 1.5oz Chopped Strand Mat in my experience can take up to a quart for 1 square yard.  The weight ratios are around 70/30 resin/glass ratio.  If you are used to using CSM you can get your ratios much lower, but its not worth it IMO.
     

  3. jasonrl23

    jasonrl23 Plays with Glass...

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    also estimate some resin waste into your equation. I really dont have a good formula for that, but Id buy 20% more than you think you need or calculate.
     
  4. DuckNut

    DuckNut Brandon, FL

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    JRL covered it well but I would just like to clarify a couple items:

    Don't coat the top of the deck and let it cure before you glass it.  Coat it with a coat of epoxy and then let it soak for a few minutes and then put your glass on and then finish wetting out your glass.

     

    This is just an example of different usage rates for different types of glass.  CSM is not designed for use with epoxy.
     
  5. Bush_Whacker

    Bush_Whacker I Love microskiff.com!

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    Thanks a bunch fellas.
    I picked up a gallon size kit of West System today on my way
    home, and was planning on doing some work on it tonight,
    but I had to take my daughter to the hospital for an ankle injury.
     
  6. Bush_Whacker

    Bush_Whacker I Love microskiff.com!

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    I also picked up a tube of West's SIX-10. I was thinking of
    using this for the bonding and possibly the fillets.
    Good idea, or no?
     
  7. twitch

    twitch Well-Known Member

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    One thing that will save you some time and elbow grease is laying down the fillets and let them firm up for an hour or 2 and then start laying glass. This keeps you from having to sand between steps.
     
  8. Bush_Whacker

    Bush_Whacker I Love microskiff.com!

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    Cool. Good to know. Thanks.
     
  9. jasonrl23

    jasonrl23 Plays with Glass...

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    Not
    Famiiar with six-10. If it's similar to 5200, then I'd say avoid doing fillets with it.

    Anything over 1/8" thick will or can have curing issues.

    FYI if you ever decide to use 5200... Hd sells it for $11 for a caulk gun sized tube. When you're done using it you can store the rest in the freezer. I've been using the same two tubes for 6 months now.
     
  10. Bush_Whacker

    Bush_Whacker I Love microskiff.com!

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    It's a 2 part epoxy.

    [​IMG]


    Here's a short video about the stuff....
    http://www.youtube.com/watch?v=3Vs0Nwi-8BI&feature=related




    I did manage to get some of the sealing coat done today after work.

    [​IMG]

    Again thanks for the help guys.
     
  11. DuckNut

    DuckNut Brandon, FL

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    Just noticed the swivel seat base...won't it be tough to turn in the chair if you cover it with a deck? :D
     
  12. Bush_Whacker

    Bush_Whacker I Love microskiff.com!

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    The wife was a little disappointed to hear that her seat was going bye-bye.

    I'm actually thinking of trying to incorporate the base into the new build somehow. A spot for the battery, maybe.
     
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