The Multi-Hip command creates complex roof structures with multiple hips radiating from a central apex point. This feature is ideal for towers, spires, and bay windows.
🔧 How to create a multi-hip roof
Access the Multi-Hip command from the Construct Roof module
Click to position the apex point (central point where all hips will meet)
Configure the settings in the Multi-hip defaults dialog box
Click Preview to check the shape before committing
Click OK to create the roof
🧾 Multi-Hip settings
Field | Description |
Number of segments | Number of equal length segments to create (minimum 3) |
Radius | Horizontal distance from the centre along each hip |
Sweep angle | Total angle the multi-hip sweeps from initial direction in anti-clockwise direction. Enter 360° for circular towers or turrets |
Ridge extension | Length of ridge projecting from the apex to create gable or hip end. Has no effect with 360° sweep angle |
Rotation angle | Angle to rotate the multi-hip clockwise from the current Y direction around the Z axis |
Preview | Shows the multi-hip shape so you can adjust settings before creating, adjust as required |
Sweep angle, 180 degrees:
💡 Understanding roof plane behaviour
All roof planes around the multi-hip use the same pitch and the same eave line length. However, they don't necessarily meet exactly at the ridge apex.
The example below shows a multi-hip with ridge extension and 180° sweep angle, creating a gable end projection.
🛠 Adjusting hip alignment after construction
If you need all hips to meet at exactly the same point:
Select the completed multi-hip roof
Use Group > Stretch
Middle-click to snap-select the lower apex point
Middle-click to snap the higher apex to its new position
All hips will stretch to the new location (pitch of each plane will vary slightly)
🛠 Common use cases
Circular tower: Set sweep angle to 360°, adjust radius and segments as needed.
Bay window roof: Use sweep angle less than 180°, add ridge extension if required.
Spire or turret: Set appropriate radius and segment count, use 360° sweep angle.
Mod-Roof > Project Gable to create a multi-hip Bay window:
⚠️ Important notes
The apex point you click becomes the central meeting point for all hip lines. Position this carefully as it determines the roof's overall geometry.
When using ridge extension, the sweep angle determines whether you get a gable end or continued hip pattern.