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The concentration of radioactive 226Ra, 232Th and 4~ in building and ceramic materials of Bangladesh was investigated by y-spectrometry with two HPGe detectors. Radium equivalent activities, representative level index values, criterion formula, emanation coefficients and 222Rn mass exhalation rates were estimated for the radiation hazard of the natural radioactivity in the materials. The activity concentrations of the natural radionuclides, radium equivalent activities, emanation coefficients and 222Rn mass exhalation rates are compared with the corresponding values for building and ceramic materials of different countries. The radium equivalent activities in the samples varied between 30.9 (mosaic stone) and 328.0 Bq.kg 1 (gypsum). The emanation coefficient of the materials ranged from 7.83 (cement) to 33.0% (soil) and the 222Rn mass exhalation rate ranged from 2.31 (stone chips) to 118.0 p.Bq.kg a.s 1 (gypsum).