“…These materials may have a lot of applications, especially, if they are cheaper than traditional building materials. Therefore, there is an interest in indoor radiation due to such applications (Koblinger, 1978;Tufail et al, 1994;Pavlovic et al, 1996;Risica et al, 2001;Eged et al, 2006;de Jong and van Dijk, 2008). In Jordan, a wide range of building materials of different origin is used (Al-Jundi et al, 2006).…”