Menu path
Modify Roof > Atrium
🧾 What it does
The Atrium command allows you to cut out a portion of the roof along an eave, creating an atrium. When you enter a negative depth value, it creates an overhang extending outward from the roof line.
🔧 How to use it
Select Modify Roof > Atrium from the menu
Click on the eave line you want to modify
The Atrium defaults dialogue box will appear
Set your atrium parameters (see settings below)
Click OK to create the atrium
🧾 Atrium settings
Field | Description |
Distance along eave | The distance along the eave where the atrium cut-out will start. This is measured along the eave from the end closer to where you selected the eave line. |
Atrium width | The width of the atrium cut-out. |
Atrium depth | The depth of the cut-out measured horizontally. Enter a positive number to create an inward cut-out (atrium), around a chimney or similar. Enter a negative number to create an outward extension (overhang). |
🛠 Examples
Positive depth: Creates an inward cut-out in the roof (traditional atrium)
Negative depth: Creates an outward extension forming an overhang
💡 Tips
Use negative depth values when you need to create overhangs or extensions beyond the original roof line. The measurement reference point is the end of the eave closest to where you initially selected and highlighted by a flashing line end point.