Most gabled roofs have eaves so you probably need to create them for your building.
How to make a cross gable roof in sketch up.
Push pull back your triangular gable.
Gable roof exerise sketchup 8 avi.
Use the line tool to draw a vertical edge from the midpoint of your roof to the angled guide you created in step 2.
1 create a roof overhang.
You can approach the construction of a gabled roof in sketchup in a bunch of ways every sketchup expert has her favorite but one method in particular works well consistently.
This video accompanies google sketchup for dummies by aidan chopra.
Erase the vertical edge you drew in step 3 and the guide you drew in step 2.
Draw two edges from the top of your vertical line to the corners of your roof.