Menu path
Construct Roof > Curved
🧾 What it does
The Curved command creates symmetrical curved roofs such as barrel vaulted or sprung roofs. This tool is ideal for creating arched roofing structures with consistent curvature.
🛠 When to use this tool
Use the Curved command when you need to construct:
Barrel vaulted roofs (continuous arched roofs)
Sprung roofs (curved roofs that spring from the eaves)
Any symmetrical curved roofing structure
🔧 How to construct a curved roof
Click the Curved command in the Construct Roof module
Click to locate the top centre point of each end of the curved roof
Click to indicate the direction of the roof (this sets the roof's orientation)
The Curved roof defaults dialog box will appear
Configure the roof parameters (see settings below)
Click OK to generate the roof
🧾 Curved roof settings
Field | Description |
Roof type | Choose the basic material: Tiles, Shingle, Shakes, Metal, or Low-Slope |
Storey | Set the storey level (1, 2, etc.) for multi-storey separation and varying labour rates |
Radius | The radius measurement of the curved roof's arc |
Full span | The span (width) of the curved roof |
Length | The length of the roof (defaults to the distance you digitised) |
Eave height | The height of the eaves from ground level |
Rafter spacing | Spacing between rafters (used for reporting purposes) |
🔧 Dialog controls
Button | Action |
Cancel | Cancels the roof generation and closes the dialog |
OK | Proceeds with roof generation using the current settings |
💡 Understanding the digitised points
The two points you click define the centre line of the curved roof:
First point: Top centre of the curved roof
Second point: Direction and orientation of the roof - the length may be defined now
🛠 Roof properties after construction
Once generated, the curved roof automatically assigns:
Gable ends: The curved ends of the roof
Eave edges: The long sides of the curved roof
You can view the roof better in isometric view by selecting View > Select > Iso.
💡 Tips for curved roof construction
Ensure your first point accurately represents the highest point of your curve
The second point determines the roof's length direction
Use isometric view to verify the roof shape after construction
Remember that rafter spacing affects reporting but not the roof geometry