Autodesk 24000-000000-9860 - Revit Architecture - PC User Manual page 590

6 Click to select the face.
7 If you selected Multiple, do the following:
Roofs created using the Roof by Face command do not automatically update if you change the mass face.
To update the roof, use the Remake command. See
Placed roof
552 | Chapter 10 Conceptual Design with Massing Studies
A roof is placed on the face immediately if the Multiple option is cleared.
Continue selecting faces.
You can add or remove faces from the selection by clicking them. The cursor indicates
whether you are adding (+) or removing (–) a face. To clear the selection of all faces and start
selecting again, on the Options Bar, click Clear.
NOTE Do not select upward-pointing and downward-pointing faces for the same roof. If you do,
Revit Architecture warns you that it is placing a roof on the upward pointing faces only. If you
want to make roof panels that cover both upward and downward faces, factor the mass into 2
faces, so that each face is either completely upward or downward. Then create one or more roofs
from the downward faces and one or more from the upward faces.
When you are finished selecting faces, on the Options Bar, click Create Roof.
TIP You can change the pick face location of the roof (either top or bottom) by modifying the roof's
Picked Faces Location property in the Element Properties dialog.
Remaking Face-Based Host Shapes on page 554.