Menu path
Tools > Project Wall (or Walls > Project Walls)
🧾 What it does
The Project Walls command automatically projects wall lines in your model up to roof planes or down to a specified height. This creates 3D walls from your drawn wall lines, improving the appearance of your model when viewed in isometric view.
After drawing wall lines, you must project them to their actual height. The original wall lines represent the top of the wall for roofed models, or floor level (CPL) for models without roofs.
🔧 How to use it
Draw your wall lines around the roof perimeter
Select Tools > Project Wall or Walls > Project Walls
Enter the wall height when prompted (defaults to eave height)
Choose your projection options in the dialog box
Select walls and roof planes if using Locate button
Click OK to create the projected walls
🛠 Projection options
Project Walls Up
Project Wall Up to Roof takes all walls up to the underside of the roof planes. For wall lines extending beyond the roof perimeter, you can set a specific wall height using the Measure function [m] to establish the eave line height.
Option | Description |
All | Projects all walls to the whole roof automatically |
Locate | Select walls and roof planes separately for precise control |
def Hgt for non-int | Define height for non-intersecting walls (walls that don't intersect with roof planes) |
Walls stretch up to the slope of the roof plane's underside. With pitched roofs, the distance from ceiling height to rafter underside is automatically calculated.
Project Walls Down
Option | Description |
Project Walls Down by Amount | Set exact distance to project walls downward |
Project Walls Down to RL (Z Hgt) | Project walls down to the Construction Plane Level (CPL) |
💡 Understanding the results
After projection, wall lines are automatically tagged as:
Wall-Top - Top edge of the wall
Wall-Base - Bottom edge of the wall
Wall-Corner - Corner connections
These tags define the type of flashing applied to each line type. Each projected wall comprises boundary lines and a plane entity.
You can also project walls on sloping sites by projecting down to the RL (Reduced Level).
💡 Pro tip
Change your view to isometric (View > Isometric) after projecting walls. This makes it easier to see the 3D walls and select them for further operations.
⚠️ Important notes
Original wall lines are deleted and replaced with the projected walls
Default wall height uses the eave height entered earlier in your model
For non-intersecting walls, you must define a projection height
Wall lines should be drawn at the top of the wall for roofed models
🧾 Abbreviations
Term | Definition |
CPL | Construction Plane Level - the reference floor level |
RL | Reduced Level - ground or site level reference point |