Menu path
Walls > Project Walls
What it does
The Project Wall command automatically projects wall lines in your model up to roof planes or down by a specified amount to the construction plane. You can project all walls at once or select individual walls to project to specific heights. The original wall lines are modified to become the top of the wall and then projected to create 3D wall structures.
🧾 Wall projection overview
Wall lines you draw to create the roof perimeter are positioned at the top of the wall when you have a roof in your model. If you don't have a roof, the wall lines would typically be at floor level (the CPL).
The following diagram shows an elevation view confirming where walls are projected from:
After drawing wall lines, you must project them to their actual height. Walls can be projected up or down from the digitised wall lines to ensure compatibility with AppliCad roofing products.
🔧 Project Walls dialog options
When you select Project Walls, a dialog box displays with multiple projection options:
Option | Description |
Project Walls Up | Projects walls up to roof plane(s) |
Project Walls Down by Amount | Projects walls down by specified distance |
Project Walls Down to RL (Z Hgt) | Projects walls down to the CPL |
All button | Projects all walls to the entire roof |
Locate button | Allows separate selection of walls and roof planes |
Def Hgt for non-int | Defines height for walls that don't intersect with roof planes |
🛠 Project Walls Up to Roof
The Project wall Up to Roof function takes all walls up to the underside of the roof planes. If a wall line extends beyond the roof perimeter, you can set a wall height to extend to. Use the Measure function [m] to establish the eave line height for accurate settings.
For whole roof projection: Select the All button to project walls to the entire roof.
For selective projection: Use the Locate button to select walls and roof planes separately. Walls will stretch up to match the slope of the roof plane's underside.
A wall line that extends beyond the roof with the height defined to the height of the eave line.
🛠 Pitched roof calculations
With pitched roofs, the distance from ceiling height to the rafter underside is automatically calculated, and the wall top projects to the roof. This is NOT the same height as the eave height.
The calculated height accounts for the actual wall height. For example, with an eave height of 3000mm and a roof pitch of 30°, the system calculates the precise wall height needed.
After entering the wall height, the wall lines project down to construct the walls. Each wall comprises boundary lines and a plane entity.
💡 Viewing tip
Change your view to isometric after projecting walls so you can easily see the 3D walls and select them for future operations. Use View > Isometric and rotate the view to better see the wall display.
🔧 Define Internal/External Corners
When using the Track or Draw Single wall functions, the software tags wall corners as 'External Corner' by default. To change corner types:
Use Walls > Define Int Corner to change to internal corner
Use Walls > Define Ext Corner to switch back to external corner
🛠 Project Walls Down
The down projection options allow you to:
Project Walls Down by Amount: Set the exact distance to project downward
Project Walls Down to RL (Z Hgt): Project down to the CPL (Construction Plane Level)
For walls that don't intersect with roof planes, you must define a project down distance using the 'def Hgt for non-int' setting.
🧾 Wall line tagging
Wall lines are automatically tagged as:
Tag | Description |
Wall-Top | Top edge of the wall |
Wall-Base | Bottom edge of the wall |
Wall-Corner | Corner connections |
These identifiers define the type of flashing applied to each line type.
🛠 Wall projection example
The following images show the transformation from initial wall lines to projected walls:
Walls before Project
Walls after Projecting down to the specified height