Menu path
Mod-Roof > Split Gable
What it does
This command attaches a gable roof to an existing gable end.
How to use Split Gable
Select Mod-Roof > Split Gable.
When prompted, locate the ridge at the gable end.
The Split defaults dialog opens. Set the values for the new gable (see below).
Click [OK].
The new roof is drawn and merged with the existing roof.
Split defaults (what each setting means)
Fixed side
Toggles between Left and Right.
Assumes you are looking at the gable from the outside.
If you select Left, the left side of the new gable aligns with the left side of the existing gable (and the same logic applies for Right).
Side for the new ridge
Toggles between Left and Right, again viewed from the outside looking in.
If you select Left, the ridge of the new gable will be to the left of the existing ridge (and the same logic applies for Right).
Ridge offset
The amount the ridge will be offset.
Think of this as the distance between the two ridges.
Depth
The depth (length) of the new gable roof.
Tuck under
The depth that the offside of the new gable will project under the main roof.
Visual reference
Quick tip
💡 The software needs the ridge offset value to construct the Split-Gable, and this dimension is rarely provided.
However, it is easily figured out:
