Gas and odor emissions produced by twelve different materials commonly used in typical swine buildings were measured using a method based on ASTM standard D-5116 After being submerged for 72 h in swine manure, material samples were thereafter randomly introduced into twelve monitoring testing chambers. The stainless steel testing chambers allowed precise control of the interior temperature, relative humidity, air speed, and airflow. Samples remained in the chambers for a 24 h desorption period. During this period, gas emissions (NH3, CH4, N2O, and CO2) were measured continuously. At the end of the desorption period, the air in each testing chamber was sampled in 80 L Tedlar bags for the determination of the odor concentration with a dynamic olfactometer using a human panel. Olfactometry results showed that plastics, like Plastisol and HDPE, and plywood were the most odorous materials, followed by concrete, PVC, galvanized steel, and cast iron. Over the period of desorption, NH3 emissions were relatively constant. The highest NH3 emissions were produced by the 30 MPa normal concrete, which reached a maximum of about 175 mg m(-2) h(-1). CO2 emissions were similar for all materials and increased linearly with time.