Plan
Home climbing wall size and angle
How wall height, angle from vertical and floor run-out fit a UK room, with a ceiling-height table and the same maths as the planner.
The question under a home wall is not "how big is a climbing wall". It is whether this angle still leaves a landing, a door and a ceiling you can live with.
Angle from vertical
Climbing walls are usually described by how far they lean past upright. 0° is a vertical panel. 25° and 40° are the two angles Moon publishes for a standard MoonBoard. Tension, for a fixed wall rather than an adjustable one, publishes bands from about 30° upward depending on the grade range you want. Steeper means the top fixings carry more pull-out, and the bottom of the panel lands further into the room.
Picture a side view. The top of the panel meets the back wall a little under the ceiling. The wood runs down and out. Two lengths matter:
- Vertical rise. How much height the panel uses. With 15 cm left under the ceiling, a 250 cm room has 235 cm of rise available.
- Floor run-out. How far the bottom edge, the kicker, sits out from the back wall. On the same 235 cm rise, 25° kicks about 110 cm. 40° kicks about 197 cm. 50° kicks about 280 cm.
The length of plywood along the slope is longer than the rise, because the sheet is the hypotenuse. At 40° that 235 cm of rise needs about 307 cm of panel. A single 2440 mm sheet is not long enough on its own. You are stacking sheets, and the frame has to hold the joint.
Those numbers are the height-limited case: the room is deep enough that the floor does not cut the panel short. If you also want a metre of mat beyond the kicker, a 40° panel in a 250 cm room wants roughly 197 cm of kick plus that landing. A 3 m deep shed disappears quickly.
Ceiling-height table
The table uses the same rules as the fit planner: 15 cm clear of the ceiling, angle from vertical, and a room deep enough that depth is not the limit. Figures are rounded to the nearest centimetre.
| Room height | Angle from vertical | Panel along the wood | Vertical rise | Floor run-out |
|---|---|---|---|---|
| 240 cm | 0° | 225 cm | 225 cm | 0 cm |
| 240 cm | 15° | 233 cm | 225 cm | 60 cm |
| 240 cm | 25° | 248 cm | 225 cm | 105 cm |
| 240 cm | 40° | 294 cm | 225 cm | 189 cm |
| 240 cm | 50° | 350 cm | 225 cm | 268 cm |
| 270 cm | 0° | 255 cm | 255 cm | 0 cm |
| 270 cm | 15° | 264 cm | 255 cm | 68 cm |
| 270 cm | 25° | 281 cm | 255 cm | 119 cm |
| 270 cm | 40° | 333 cm | 255 cm | 214 cm |
| 270 cm | 50° | 397 cm | 255 cm | 304 cm |
| 300 cm | 0° | 285 cm | 285 cm | 0 cm |
| 300 cm | 15° | 295 cm | 285 cm | 76 cm |
| 300 cm | 25° | 314 cm | 285 cm | 133 cm |
| 300 cm | 40° | 372 cm | 285 cm | 239 cm |
| 300 cm | 50° | 443 cm | 285 cm | 340 cm |
Read a cell as geometry, not as a recommendation. A 300 cm room at 40° produces a panel a little over 3.7 m along the wood and a run-out of about 2.4 m before you add matting. That is a different building from a vertical panel in a box room.
A room that is deep enough on paper
A room 300 cm wide, 500 cm deep and 250 cm high, with a 244 cm panel at 25° from vertical and 100 cm of landing past the kicker, leaves a panel 259 cm along the wood. The vertical rise is 235 cm and the floor run-out is 110 cm. At a 200 mm grid with a 50 mm edge margin that is 3 sheets of 2440 × 1220 mm plywood and 156 M10 T-nuts. The starter-hold hint is 55.
Put your own depth in the planner. If the run-out plus the landing is longer than the room, the tool shortens the panel and says so. Shortening the panel to save the floor also lowers the top of the useful wall. You cannot keep both a steep angle and a full-height panel in a shallow room.
Width, and the sheet you can buy
UK sheet plywood is sold as 2440 × 1220 mm. A panel 244 cm wide is one sheet across. Wider than that, you are joining sheets and the joint needs a stud behind it. Narrower, you are ripping a sheet and the offcut may or may not make the next course.
Leave room at the sides to build the frame and to stand off the side wall. The planner keeps 15 cm each side. A 244 cm panel therefore wants a room at least 274 cm wide, which already rules out a lot of single garages if you also want the panel centred on a pier-to-pier measurement.
What to measure before you trust a photo
- Floor to the real ceiling, at the point the top fixing will sit. Sloping loft ceilings and garage door tracks are lower than the ridge.
- The back wall to the nearest thing that cannot move: door arc, car, boiler, stair.
- Side wall to side wall, ignoring skirting you are willing to cut.
- The swing of every door that opens into the run-out, including the up-and-over if this is a garage.
Then decide the angle. A vertical or gently overhanging wall trains footwork and suits a low room. A 40° board trains the steeper style and consumes floor. Adjustable frames exist so you can change your mind. They need their own clearance at every angle you intend to use, not only the gentle one, because the steep setting is the one that kicks furthest.
System boards publish their own envelopes. Moon's standard DIY 40° board is 3174 mm high, 2440 mm wide and 2353 mm deep before matting. Compare that with your tape before you compare hold sets. The board guide has the published figures in one place.