I am about to shape my first SUP’s and was hoping to here back from some of you more experienced SUP shapers as to what glassing schedule to use. My plan is to shape a 10’6"x29x18.5"Nx19"Tx4.5" Fish. I was thinking of going with 3x7.5oz deck, 2x7.5 bottom. The board will be used for lake and California point break surf. My other question is how much RR epoxy/hardener should I plan on for my lam coats, hot coat? The board will be sealed prior to lam with micro balloons. I also have two 11’6" blanks on the way that will be more traditional SUP shapes. Any advise you guys could give would be a great help.
Not an experienced SUP shaper in anyway, but I have heard lots of people recommend adding a couple layers of 4-6oz glass on the rails of the board to help them stand up to paddle hits. There’s some stuff in the archives about that, but still not that much. I think what you’re thinking of using should be more than enough. With that much glass you probably won’t need deck patches either.
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I am about to shape my first SUP’s and was hoping to here back from some of you more experienced SUP shapers as to what glassing schedule to use. My plan is to shape a 10’6"x29x18.5"Nx19"Tx4.5" Fish. I was thinking of going with 3x7.5oz deck, 2x7.5 bottom. The board will be used for lake and California point break surf. My other question is how much RR epoxy/hardener should I plan on for my lam coats, hot coat? The board will be sealed prior to lam with micro balloons. I also have two 11’6" blanks on the way that will be more traditional SUP shapes. Any advise you guys could give would be a great help.
I’ve only shaped and glassed 3 of the SUP’s. All 10’6" by 29 and 28. Also pretty close in dimensions to yours. All three were done with double 7.5 on the deck and single 7.5 on the bottom. So far all are holding up really well and for lake use I don’t think that your going to need triple 7.5 on the deck. I can see the need for a bit extra on the rails but I don’t bang my board with the paddle. Others that I’ve seen get beat up pretty bad by poor paddle mechanics, best way is to learn not to smack your board.
I don’t have my notes but I do remember 22 oz. of mixed resin and qcell per side for a sealer and close to 55 oz. of resin for the deck using double 7.5 oz. glass for the lam. The bottom lam was quite a bit less than the deck. If you need the exact amount let me know and I’ll check my notes.
I’m also using the fast hardner for the RR so after laminating the bottom in one shot I do the deck in two stages. First the flat of the deck with 35oz. and then mix a batch of 20z. for the rails/laps. I tried to do the deck lam in one shot on my first board but it was too stressful as I’m not a pro glasser. I pulled it off but just barely. It was so much easier to mix the deck lam in two stages and take my time.
My next board is shaped and I’m dropping my glass schedule down to single 6 bottom and double 6 deck with a 4 under my feet. Triple 7.5 and double 7.5 sounds like a tank. The single 7.5 bottom double 7.5 deck was recommended to me by a shaper/glasser that specializes in SUP’s.
EPS? Density?
Blanks are EPS hand cut from billet foam. I thought that they were 2 lb but I just got a Marko standup blank that said 1.5 on it.
6+6+patch on the deck and 6+6 bottom should be pretty strong with little, if any deck denting. If you use one of those big deck traction pads, you might even skip the patch.
Light density EPS is pretty soft. You might take a couple of scrap cutoffs and try some different lamination schedules. Subject the test panels to the good old thumb test to make sure you’re OK with it.
Some people can live with and even prefer deck dents. Others see them as a sign of a glass job that is too weak.
With 1.5 foam do a double 7.5 bottom and a triple 7.5 deck. Do a reverse lap (laminate the deck first) using 2000 resin on the deck (2000 will resist denting best). Use 2020 on the bottom. 2020 is more flexible and the outside lap coming from the bottom to the deck on the outside will resist cracking and dings from the paddle better. Hot coat with 2020.
A gallon and a half will probably be plenty. Start laminate with a 24 ounce batch. Work it till its gone doing the laminate 1/2 at a time (stringer to rail) When the resins gone mix another batch and continue to laminate. With epoxy there is no real “gel” time so multiple batch laminating comes out best on large projects.
Thanks Greg and others for your contributions to my project. The 10’6" board is 1.5# so I plan on more glass rather than too little. I will probably use less for the 11’6" blanks that I have coming in as they are 2#. Any recommendations for a vent? This board will see some high temps and am concerned with delam.
I don’t think a vent is needed in 1.5 foam. I’m never used one and never had a problem.
Greg
My concern with the 1.5# eps without a plug is it’s exposure to temps in excess of 115f. I haven’t had enough experience with eps to know if the higher temps would pose a problem or not. What do you think? I am not as concerned with the 2# blanks. Thanks for all your help.