The other day I was drawing a kitchen that had a roof detail that was important to the design of the kitchen. I found it frustrating to be constantly hiding and showing the roof. To make things easier, I came up with this technique to use textures in Sketchup to allow me to "see through" the roof, without spoiling the view once you were inside the kitchen. Take a look at the video to see how it all works.
Kitchen Design Plugin for Sketchup, Sketchup training.