PlyBeam Surfboard Kits

All New Ply-Beam Technology- designed to get you in and out of the shop easier and out on the water faster.



For three years, behind the scenes, we've been reimaginging the process of building a wooden surfboard at home. We've looked at every step, thought about each tool and paused at each hurdle, and then strived to create a more intuitive method for homebuilders. 

Grain Surfboards’ All New Ply-Beam Surfboard Kits are designed to get you in and out of the shop easier and out on the water faster.  PlyBeam Kits can be built and shaped in half the time of our HomeGrown Kits, (Just 4 Days!).

Ply-Beam Technology allows for less set up time, fewer tools and materials and completely eliminates the need for a complicated shop setup like a rocker table and bar clamps. These new surfboard kits are fully CNC-machined from Lloyds Certified, FSC Certified marine plywood. You’ll be up and building in minutes, seeing real progress from day one. Just cut out the parts and start assembling your board. 

Whats Included in a full PlyBeam Kit:
  • Precision-cut PlyBeam Keel, frames, rails, stringers, planks all from Lloyds Certified marine ply. 
  • Cork railbands
  • All internal blocking (nose, tail, hardware, etc)
  • Built-In fin or fin box(s) depending on the model
  • Built-in leash loop
  • Membrane Air vent
  • 1 tube of pre-thickened epoxy and a 10oz tube of Grizzly Glue
  • Epoxy resin and hardener
  • Fiberglass cloth
  • Epoxy mixing buckets
  • Plastic squeegees
  • Online instructions including detailed images and how-to videos
List of tools and supplies you'll need that are not included in our kit:
  • Block plane and/or spokeshave
  • Sharp chisel
  • Fine tooth saw
  • Utility knife
  • 2” spring (50 for the 5'5", 75 for the 7'6", 100 for the 10') found at any box store for $1 ea
  • Some small expendibles such as masking tape, some pencils, some 80 and 120 grit sandpaper and sanding blocks/ fairing boards
  • If starting from scratch with no tools (and no friends with tools to loan you), plan to spend roughly $100- $175 on these things, above and beyond the kit price. Everything can be purchased at your local hardware store or online. Our go-to website for building supplies is

Looking for more informartion? Click here.

Ready to get started? Click here and select the model you're looking for.

Note: Before you decide on a surfboard kit from someone else, make sure you understand the total cost of the component materials you'll have to source and buy separately, as well as the time it will take to fill in the gaps of knowledge that aren't covered in their manual.   Usually, we'll get them out within a week or two, but allow three weeks, let us know if there's a rush, and please be patient - once in a while we have a shortage of materials and have to wait for something to come in. You can find tools and other board building supplies and materials you might need in our online store.

Note for International Kit Customers: PlyBeam Kits are available in the US only at this time. If you're anywhere in Europe, please visit Fyne Boat Kits. In Australia or New Zealand, visit Denman Marine. The good folks at both of these places offer all of HomeGrown Kit designs using local woods. If you're anywhere else in the world, note that we may not be able to send you epoxy due to international haz-mat shipping regulations. If this is the case, we'll happily credit you back for the epoxies and any supplies we cant send and we'll do our best to help you find a local epoxy supplier in your part of the world. 

Home build feeling to much to take on? Join us in Maine, New York or meet us on the road and let us walk you through the process in one of our 4-day workshops. You'll do the building, but we'll be at your side to make sure it all comes together just right.