Hey guys. I am glassing a US Foam SUP with Polyester Resin. I have never done one before so I could use a few ideas on the glassing schedule. The customer it is for probably dosen’t weigh more than about 165 lbs. The blank is a 10’6" I believe.
I also have an EPS SUP coming in next week for an epoxy glass job. I could use some ideas on a glassing schedule for that one also. I have no idea of the length or of the weight of the customer.
Thanks!
Hi Leslie -
Any idea on the density of the blanks? Also good info is if they will use deck pads or wax.
Im not an SUP guy as of yet, but I have done some 10 and 11 ft longboards
10 ft’r I used 6oz on the deck and 1 6oz on the bottom ,this was epoxy
the 11.3 was 10oz and 7.5 volan on the deck and bottom was one 10oz
they both came out tough as hell
edit: that was double 6oz on the deck
Here is my SUP standards: Bottoms- 4 and 6 oz.; Decks: 4 and 6 oz w/ 6 oz deck patch. I use for both PE and epoxy. I like it best when I can find 38" wide 4 oz glass to use as the outer layer for both the deck and bottom. However, most times I can only find 6 oz in 38" wide here in Hawaii.
My two cents worth.
D
Hi Leslie…on my own I used double 6 deck with a patch starting at 14" up from the tail and going to 30" back from the nose.
I used single 6 on the bottom with a tail patch. I didn’t hotcoat the deck, left it as is after lamming and didn’t bother with a deck pad. The deck glass is thick and tough. I did hotcoat the bottom rather thick and didn’t bother sanding it down…lazy…
Its held up well, no deck dents and nothing to the bottom yet, its all polyester.
Mine is much shorter at 9’4" by 31.5", 1/2" cedar stringer.
The decks on the sups’ do get some abuse if the surfer is new to stand up.
I should find out the density, that is a good point. I really don’t want to go with Volan. I think it would make the thing to heavy. The poor guy would have to drag it to the water. I was thinking about 2x4oz bottom if I can find 38" wide, otherwise a 6oz & 4oz bottom and a 6oz & 4oz deck with an extra 4oz 3/4 deck patch. I think I should talk the guy int a deck pad also. For some reason, I was thinking that SUPs had many layers of glass…I think I was mixed up with kite and tow boards…I will be at Fiberglass Hawaii next weekend and find out the situation on 38" 4oz.
Thanks guys!
…seems that you dont understand that volan or silane have nothing to do with the weight
you can go 2 oz 4oz 5 oz 6oz 7.5 oz, etc with silane or volan
without adding weight
Ken Ebert’s Segway Composite site has info on epoxy/EPS schedules for various densities.
L…you are right, these sUP’s don’t get nearly the abuse that kite or sailboards do. A true 2 lb. EPS board would be very durable with 6/4 on both sides and all layers wrapped. The rails will get the most abuse…see if the guy is using a paddle that comes with the padding where it might hit the rails causing scratches.
The PU seems like the wrong way to go with these big beasts. Why bother? EPS is ideal for these designs. However, since the guy is already doing it, Double 6 top and bottom should be fine if he is using a deck pad. Or if you glass the PU with epoxy, drop it to the same schedule as the EPS board.
If the guy with the EPS is careful, he could go for a 4/4 bottom and a 6/4 deck for lightness.
Just remember that epoxy resin is lighter than PE, and a rough way to figure strength comparisons of epoxy to PE is around 2 oz…meaning an epoxy glass job with 4 oz is sorta equal to a PE glass job with 6 oz…roughly.
For the 1.5lb density eps I’ve been going 7.5/38" wide bottoms with 7.5/6 S with 6 S foot patches decks. The S seems to work well for paddle strikes and compression on the softer foam. This has been a good layup for customers.
For my own personnal ones I’ll use single 6e bot. 6e/6s decks with foot patches. On the 1.5lb. foam this makes for a very light board.
On 2 lb. foam the 7.5 oz. can be substituted for 6e.
I guess the islands have their challenges getting specific materials? Check out Thayercraft.com …they have a ton of different cloths on hand and sometimes run specials that include shipping…maybe not for Hawaii though. Still, it is a great resource for ALL KINDS of different hard to get reinforcements.