In this Computers & Programming video tutorial you will learn how to intersect roofs on Google SketchUp house. This demonstration tutorial opens up a project where the building is already constructed and slanting roof is to be added. The building is in 'L' shape. Hence, the slanting roofs are in different directions and both have to intersect at one point on the center line. First the roof of the longer section of the house is made. Then that of the shorter section is made with a gap between them at the upper portion. This gap is to be filled by intersecting the two roofs. Now click on the inner tip of the roof and drag and match it exactly with the centerline of the other roof on the longer section of the building.