This paper investigates the fundamental characteristics of wind pressures and wind forces on domed free roofsDomed free roof based on a wind tunnel experimentWind tunnel experiment and a CFDComputational Fluid Dynamics (CFD) analysis using LESLarge Eddy Simulation (LES). The rise-to-span ratio, f/D, was varied from 0.1 to 0.4. The wind tunnelWind tunnel models were made by using a 3D printer. The distributions of wind pressure coefficientsPressure coefficients along a centerline on the top and bottom surfaces of the roof were measured. The wind pressure distributionWind pressure distribution on the whole roof was obtained by rotating the model. The results indicated that the contour lines of mean wind pressure coefficientsPressure coefficients, \(\overline{C}_{p,t}\) and \(\overline{C}_{p,b}\) , on the top and bottom surfaces and the resultant mean wind force coefficient, \(\overline{C}_{f}\) (= \(\overline{C}_{p,t} - \overline{C}_{p,b}\) ) were almost perpendicular to the wind direction. An empirical formula was provided for the \(\overline{C}_{f}\) distribution along the centerline parallel to the wind direction. The distributions of the maximum and minimum peak wind force coefficients, \(\hat{C}_{f}\) and \(\check{C}_{f}\) , on the whole roof were also obtained. The characteristics of the overall wind forces on the roof were made clear based on the CFDComputational Fluid Dynamics (CFD) results. The results may provide a useful guidance for structural engineers when estimating the design wind loadsWind loads.