A comment in the post "Real Children's art from Gaza" implies that the Oxfam drawings from Gaza were perhaps fraudulent, since they showed homes with gables. Indeed many homes in the Middle east do have flat roofs- as an extension of the living space, and as a refuge from the heat.
But as this June 2007 Philip Rizk photo shows, flat roofs are by no means universal in Gaza. This photo of Palestinian President Mahmoud Abbas’s house in Gaza City, appeared in the Electronic Intifada.
Here it is, from a different angle
Rather nice, huh? Not what you'd expect from the World's largest concentration camp, is it?