SUP board

Making a simple SUP board can be a lots of fun. And you don't have to spend a lot of money.

This one costed me around 200$.

1. What we need?

- A drawing of a SUP board.

The drawings are actually for a very simple board, that I designed in 1 hour : ), without really consulting with a naval engineer. What I wanted is a simple SUP board that floats, and that can hold 105 kg without drowning (me ; ) ). The volume of the board is approximately 220 liters. the calculation says you need twice as much ''air'' than your weight (so that half of board sticks out of water).

The drawings are divided in 3 A0 sheets, so that you can print it 1:1 on a supported printer. You will need this drawings later to transfer it on foam...

OK, here is the detailed list of other things that you need:

- styrofoam (or styrodur) 18 sheets 1m x 1m x 50 mm

- polyvinyl acetate glue - cca 1.5 kg

- sandpaper of various grades (80, 120, 160...1 m of each)

- compatible sandpaper holder

- wood saw (or maybe steel saw...it cuts finer cuts)

- plaster for wood - cca 1 kg

- grinder

- Epoxy 2K (4 kg)

- rowing material (110 g/m2)

OK, that is all for start.

2. Glueing together

First thing, you should buy styrofoam (or styrodur)in plates, in dimensions 1m x 1m x 50 mm or similar... For this design you will need 18 sheets.

You will glue 3 of them together, offseting the center one by 50 mm with a polyvinyl acetate glue (it is actually a glue for wood but works great with styrofoam).

You will end up with 6 ''sandwiches''.

Assemble/glue 3 ''sandwiches'' together joining on the slots.

Now you will end up with 2 long sandwiches :) .

3. Cutting the surplus

OK, now, my suggestion is to work in this stage with two ''halfs'' of the board for easier manipulation.

At least that is what I did...I did not have a big table to fit the whole board at once while sanding.

So let us suppose the glue dried, and you got your design printouts ready.

We can assemble just temporarily the two halfs without glueing them together. I've putted them on two wooden planks

Cut the drawing on the edges and lay it on the assembled board...and transfer the drawing on the board with a permanent marker...

You can then take a wood saw and cut close to line...not really on the line, you will be able to thin it at the end with sand paper.

4. Sanding

Once you cutted all the sides you can start with paper sanding

This design does not really take in mind high-end design. The only thing we had in mind is functionality. At the end we need to have a flat board, that emulates the shape of a real board. And with the addition of a fin, we have what we wanted.