The main goal of this work was to determine the chemical composition of building materials used in Turkey by utilizing energy dispersive X-ray fluorescence (EDXRF) spectrometry. Gas concrete, cement, sand, bricks, roofing tiles, marble, lime and gypsum materials were selected as building materials for this research. The chemical contents and their trace concentrations of the selected samples were determined. The most abundant oxides measured were generally SiO(2), Al(2)O(3), CaO, MgO, Fe(2)O(3), K(2)O and SO(3) for all samples. While the main chemical component of gas concrete, cement, sand and marble samples were SiO(2) and CaO, brick and roofing tile mainly consisted of SiO(2) and Al(2)O(3). CaO and SO(3) were major component of lime and gypsum samples, respectively. For U and Th concentrations in the samples, activities of (226)Ra and (232)Th were measured by utilizing gamma spectrometry. ANOVA and Pearson correlation analyses were performed on the studied data for statistical analysis. (C) 2010 Elsevier Ltd. All rights reserved.