Fasten the knob at the 1/3 edge of the shelf
Fasten those bracket on the wall, and fasten the shelf onto those bracket
Put your surfboard on
Use a rope to tighten on the knob and through your surfboard then wind the rest of it on the shelf.
Jules Yap started IKEAHackers.net in 2006 as a personal blog to showcase the most impressive IKEA hacks from all over the world. Since then, she has learned a lot more about power tools and DIY. Her site has helped thousands modify IKEA furniture with step-by-step tutorials, craft projects and home styling.