[en] In this study, the activity concentrations of ²²⁶Ra, ²³²Th, ²²²Rn, and ⁴⁰K, emanation fractions (P), equilibrium equivalent concentration (EEC), and mass exhalation rates (E_m) of radon released from building materials used in Malaysia were studied using gamma-ray spectrometer with HPGe detector. Radiological parameters [activity concentration index (ACI), indoor air-absorbed dose rate (D_in), annual effective dose (AED_in) from external and internal (E_Rn), soft tissues (H_ST) and lung (H_L), and effective dose equivalent (H_eff)] were estimated to evaluate radiological hazards due to the use of these building materials: sand, cement, gravel, bricks, tiles, fly ash, white cement, and ceramic raw materials. The measured P, EEC, and E_m vary from 10 to 30%, 0.9 to 22 Bq m⁻³, and 33 to 674 mBq h⁻¹ kg⁻¹, respectively, while the calculated ACI and AED_in vary from 0.1 ± 0.01 to 2.1 ± 0.1 and 0.1 ± 0.01 to 2.4 ± 0.6 mSv y⁻¹, respectively. On the other hand, the internal annual effective dose ranges from 0.1 to 1.4 mSv y⁻¹. The estimated radiological risk parameters were below the recommended maximum values, and radiological hazards associated with building materials under investigation are therefore negligible.