In my area, we frequently add colonial molding to the edges of roof planes. When I add a roof plane to my plan, and then choose the Select Objects arrow tool, I can double click on the roof planes in my plan, but I don't see how to add a molding to a roof plane in the Roof Plane Specification dialog box.
How can I add a molding to my roof plane?
A roof plane will not automatically permit you to place a molding on the edge. For that reason, you will need to place a soffit in your drawing, add a molding to the soffit and resize the soffit so that it is no larger than the molding itself.
To use the soffit tool to add a molding to a roof plane
If you have already built the roof planes in your plan, chances are good that gutters were included with the roof planes, so to remove the gutters, use the Select Objects arrow tool to select a Roof plane and click on the Open Object edit tool.
In the Roof Plane Specification dialog, on the Options panel uncheck the box beside Gutter.
Click the OK button to apply this change and close the dialog.
Repeat these steps for all roof planes that will have moldings applied to them.
To rebuild the roof without gutters
From the menu, select Build> Roof> Build Roof to display the Build Roof dialog.
Within the Build Roof dialog, you will want to check Build Fascia and Roof Trim.
Do NOT check the entry for Build Roof Planes. This will delete and rebuild your roof.
Click OK to apply this change and close the Build Roof dialog.
Now that we have removed the gutter, we are ready to add an object to the plan that can have a molding applied to it.
To add a soffit and apply a molding to it
To add a soffit to your plan, from the menu select Build> Cabinet> Soffit then click in your plan to place it.
Next, use the Select Objects tool to select the newly placed soffit, then click on the Open Object edit tool to display its specification dialog.
On the General panel, set the appropriate Height, Width and Depth values for your soffit.
Next, select the Moldings panel, and click on the Add New button to display the Select Library Object dialog.
Navigate to the appropriate molding you would like to use, select it, and click OK to return to the Soffit Specification dialog.
Modify the molding's Height and Width values, if needed.
Click OK to apply the changes and close the Soffit Specification dialog.
To make any other needed modifications
Using the Select Objects tool, select the soffit and use its edit handles to move or resize it as needed so it it matches the length of the roof plan.
From the menu select 3D> Create Perspective View> Full Overview. This will create a full overview of your structure, and will show the soffit and molding that has been applied to it.
With a bit of experimentation you will soon have a molding that looks as if it is part of the roof plane.