Attached Link: http://www.renderosity.com/viewed.ez?galleryid=818681

I also once modeled a house completely in Vue (see linked image in my gallery). I made the triangles carrying the roof from flat cubes which I formed into triangles by putting other cubes diagonally over them and using boolean subtractions. This was rather tedious so I might today (if I would try it again) use terrains for this purpose just like I did for the walls. The sides of the roof, however, are just flat cubes. Vue is not particularly good at modelling ;-) but I think you learn quite some things about the program messing around with this stuff.