This study analyses the moisture transport phenomena of 3D printing lime-cement mortars with Phase Change Materials (PCM) and Cellulose Fibers (F) for architectural applications comparing experimental results and numerical analysis. A lime-cement control mortar was designed and cellulose fibers and different percentages of PCM (10, 20 and 30%) were added, leading to a total of eight different mixtures. Physical and mechanical characterization tests were performed on mortar samples and capillary water absorption tests were carried out over time for 24h. Based on the experimental results, the computational Moisture Diffusion model, a nonlinear FEM model, was used. Further transport phenomena will be addressed in successive works.