Most home-built prone paddleboards are hollow wooden boards: a plywood “fishbone” frame built on a rocker table, closed in with thin wood strips and plywood skins, then sealed with fiberglass and epoxy. The other route is to shape a long EPS foam blank and glass it with epoxy, like a big surfboard. Either way, plan on a long project, and start from proper plans or a kit rather than guessing the shape.
A prone paddleboard is the original “paddle board”: a long, narrow board you paddle with your hands while lying down or kneeling, no paddle involved. It’s a different craft from a stand up paddle board, and that changes the design.
Quick answer
- Pick a design first: prone boards are long and narrow. Stock-class race boards are 12 feet or under; unlimited boards are longer.
- Hollow wood (most common DIY): rocker table → fishbone frame → bottom panel → strip rails → solid blocking → top panel → fair, glass and coat.
- Foam and epoxy: shape an EPS blank, glass with fiberglass and epoxy (not polyester, which melts EPS), fit a vent and leash point.
- Extras prone boards need: knee wells or a padded deck, and often a chin or chest pad.
- Time: dozens of hours at the least; a wooden board is a winter-long project for most people.
What makes a prone paddleboard different
- Length: long boards glide further for each arm stroke. The Molokai-2-Oahu race, the best-known prone event, runs a stock class for boards 12 feet or under and an unlimited class with no length limit and a rudder allowed.
- Width: much narrower than a SUP, because you’re lying on it, not standing.
- Shape: usually a rounded or displacement-style bottom, a raised nose to ride over swell, and a narrow tail for straight tracking.
- Deck: knee paddling needs knee wells or pads, and many paddlers add a chest or chin pad for comfort.
Because these details matter so much, use published plans or a kit designed for prone paddling rather than adapting a stand up paddle board design.
Tools and materials
For a hollow wooden board
- Plans or a kit with frame parts (some are laser-cut)
- Thin plywood for the frame, bottom and top skins
- Wood strips for the rails (often bead-and-cove)
- Solid wood or foam for blocking
- Epoxy resin, fiberglass cloth and filler
- Clamps (lots), webbing straps or weights to hold the deck down
- A block plane and spokeshave for fairing; a steam source such as a clothes iron for tight bends
- A flat, rigid rocker table the length of the board
For a foam board
- A long EPS blank (or glued-up sheets)
- Shaping tools (saw or hot wire, surform, sanding blocks)
- Fiberglass cloth and epoxy
- A leash attachment point and vent plug
For both
- Squeegees and brushes for laminating
- A respirator, nitrile gloves and eye protection
How to build a hollow wooden prone board
1. Build the rocker table
The rocker table is a flat, rigid bench with risers cut to the board’s bottom curve (its rocker). It holds the board in shape for the whole build, and it’s what makes the finished board straight. Take your time making it level.
2. Make the bottom panel
Join plywood or wood strips into a panel big enough for the bottom and cut it to the plan outline. Lay it on the rocker table so it takes up the curve.
3. Build the fishbone frame
A spine running down the middle with ribs coming off it does the job a foam core does in a factory board. Glue the frame to the bottom panel, checking it against the plans as you go.
4. Strip the rails
Glue thin strips edge to edge around the outside of the frame to form the rails. Narrow strips bend easily; only the tightest curves near the nose and tail may need steaming for a minute or so. Laminating several thin strips is far easier than forcing one thick piece.
5. Add the blocking
Fit solid blocks at the nose and tail, and anywhere hardware will go: the leash point, any fin box, and the vent. Reused foam or solid wood both work.
6. Fit the top panel
Glue on the deck and hold it down evenly while the glue cures, with clamps, webbing straps or wedges against a frame above the board. Once it’s set, trim the overhang and shape the rails with a plane and spokeshave.
7. Sand and glass
Sand the whole board fair. Then laminate it with fiberglass cloth and epoxy, add a filler (hot) coat to fill the weave, sand again, and finish with a gloss coat if you want a shine.
8. Fit the deck
Add knee pads or wells and a chest or chin pad where you’ll lie. Test where your knees and chest naturally fall before you fix them.
How to build a foam prone board
The foam method is the same as making a foam stand up paddle board, just longer and narrower:
- Make a half-outline template from your plans and cut the blank.
- Shape the rocker, then the bottom and rails.
- Glass the bottom, then the deck, with fiberglass cloth and epoxy.
- Set the leash point and vent plug in epoxy.
- Fill coat, sand and gloss.
Our guide to how to make a paddle board walks through the foam method step by step.
Getting started in prone paddling
Prone paddling uses different muscles from stand up paddling, mainly your shoulders, back and neck.
- Start short and slow. Short sessions in flat water while your shoulders and neck adjust.
- Learn lying down first, then knee paddling, which is faster but needs more balance.
- Keep your neck relaxed. Don’t crane your head up; find the spot on the board where you can see ahead comfortably. A chin pad helps.
- Respect the weather. Prone boards are low and hard for boats to see. Wear bright colors, use a leash, and stay out of wind and swell beyond your skill.
- Paddle with others for longer open-water trips.
If you’re coming from stand up paddling, see what muscles does paddle boarding work for how the workouts compare.
FAQ
What’s the difference between a prone paddleboard and a SUP?
You paddle a prone board with your arms while lying or kneeling on it, and there’s no paddle. A SUP is wider and more stable so you can stand, and you use a paddle. More in what does SUP mean.
How long should a prone paddleboard be?
Stock prone race boards are 12 feet or under; unlimited boards are longer. For a first build, a stock-length design is easier to build, store and carry.
Is it cheaper to build a prone paddleboard than buy one?
Sometimes. Factory race boards can be expensive, and a wooden build can come in lower if you already own tools. Your time is the big cost.
Can I use polyester resin?
Not on EPS foam, which it dissolves. Epoxy works on both foam and wooden boards.
