How room dimensions are measured

Learn which wall face room dimensions are measured from and how to change the measurement reference.

1. When a room is drawn, its dimensions are calculated from the inner face of one wall to the inner face of the opposite wall, not from inside the wall thickness.

   ✓ Checked in the product on 16 October 2026

2. While drawing a wall, each press of the space bar moves the line you draw along (the wall's location line) to the next of: the wall's centre line, its right-hand face, its left-hand face (right and left of the drawing direction), then back to the centre line. When the room is drawn clockwise the right-hand face is the inner face, so the first press puts the line on the inner face and the second on the outer face; drawn anticlockwise it is the other way round.

3. Room length can then be typed directly and confirmed with Enter.

   ✓ Checked in the product on 16 October 2026