How to Make a Foil SUP Board | Sealing and Cloth Inlay - Video 5 of 7

[@BrentDuty]

Nice work man. I made one about 4 years ago. Looks like you could use it for winging and sup foiling. The cat fabric is cool touch. You can use epoxy and micro bubbles into a peanut butter consistency to set the tracks in. It works for other applications too.

[@AndrewWorkshop]

Thanks! I have glass bubbles and was going to go that route, probably would be stronger too. Since this board, I have made a much lighter board that is good for winging and suping but I still trying to get the hang of it!

[@BrentDuty]

@@AndrewWorkshop It’s not easy, but it’s so worth it. You’ll have a lot of breakthroughs that keep you going. I just learned winging right after sup and it’s opened more days on the water. Foil tech has progressed a lot too. What you have is good enough to learn on, but don’t spend too long on it because it will hold you back.

[@AndrewWorkshop]

@@BrentDuty Yeah, now that I got SUP surfing and paddling down, I really want to get the hang of SUP foiling! Good to know!

[@jamesroscoe7555]

Looks great! Did you get any epoxy in your track box without tape? Depending on how porous the cloth is (and how absorbent the foam), it can be fussy to know how much epoxy to pour under the cloth. Excess can be pulled out, but that is fussy too, as too much working it can cause bubbles and ripples under the cloth, or it can shift even with pins. I think if I do any more cloth in the future I will try a more open/porous material. Great video demonstration of how to do it!

[@AndrewWorkshop]

Thanks James! I didn't get any epoxy in the trackbox, but I do use tape now in all my boxes as insurance. Over all the inlay came out great, just too bad it was so heavy. I just completed a paper inlay on the nose of a board and it came out great, will share a photo once I get the seal coats on. Running low on epoxy, waiting on some epoxy from Greenlight :)

[@jamesroscoe7555]

@@AndrewWorkshop I'd need to look it up, but iirc the strength of 4oz s-glass is comparable to 6oz e-glass with much less weight. If I was to hazard a guess, the many layers of 6oz on the bottom (and maybe the pine block also?) would impact weight more than the cloth (assuming the cloth was thin). Surf shop s-glass tends to not be wide enough for sups but there are composites places that sell ~40 and 50" widths. Will be cool to see the paper lamination!

[@AndrewWorkshop]

Interesting, 4oz s-glass would definitely save some weight with the surface area of a SUP. Will have to research it a bit, I found S-Glass that I used on the longboard was much stronger (tensile strength) and I think compressive strength I remember reading maybe 10-20% stronger. The pine block definitely added some weight!! I think it was a perfect storm of things, EPS density, inlay, pine block, the glassing schedule. Good lesson, my newer SUPs are all so much lighter! LOL

[@jamesroscoe7555]

@@AndrewWorkshop The SUP hydrofoil is more complex in terms of stress than normal surfboards, especially with lower density foam. Numbers I see for s2 vs e are 10% better in compression, 30% tensile, 10% stiffer. So my anecdotal observation building small boards may not apply but the 4oz s seems really tough. With the pine trackbox, I was thinking it might be possible to lighten by drilling holes thickness-wise and spray foam. Which got me thinking that it may be possible to design a higher surface area shape than a rectangle to better distribute the load into the EPS foam. I suppose all that makes little difference with the high density foam blocks you are using for this now.