I am trying to model a gable roof. I understand that this needs to be accomplished by adjusting the heights of the ridge beam but am having trouble defining two separate slab polygons. I am able to successfully model one half of the gable roof and have it display correctly in 3D, but when I draw the opposite side of the roof slab edge the slab edge along the ridge beam for the first half disappears. How can I successfully draw the 2 sides of the gable roof? Thank you in advance.