Menu path
Mod-Roof > Merge-Planes
🧾 What it does
This command combines two separate roof planes that are in the same plane in space (coplanar) into one continuous roof plane. This is particularly useful for metal roofs where you need continuous bottom planes instead of separate sections.
🔧 How to use it
Select Mod-Roof > Merge-Planes from the menu
Select the first roof plane you want to merge
Select the second roof plane you want to merge
The system will automatically create a new merged roof plane if the conditions are met
🛠 Prerequisites for merging
For two roof planes to merge successfully, they must meet all these conditions:
Condition | Description |
Parallel | Both planes must be parallel to each other |
Coplanar | Both planes must exist in the same plane in space |
Common edge | Planes must share a common edge (either fully or partially) |
🛠 Practical example
Consider two gable roofs aligned with each other. In the "before" scenario, the roof planes are separate. For a tile roof, this separation may not be an issue, but for a metal roof, you want the bottom plane to be continuous.
Using the Merge-Planes command, you can select plane d1 and plane d2 and turn them into one plane. The result shows a continuous hatch pattern in the "after" image, indicating a single merged plane.
💡 Additional merging behaviour
Connected lines of the same type will also be merged if they are collinear and connect to the same planes. This ensures clean, continuous roof geometry after the merge operation.
⚠️ Important notes
The merge will only work if all prerequisite conditions are met. If the planes don't meet these requirements, the command will not execute successfully.