Gravimetric cup test mass measurements and calculations (wet-cup & dry-cup), Eucalyptus nitens, 23°C, 50% RH

This dataset contains gravimetric cup-test measurements and derived vapour transport parameters for solid Eucalyptus nitens tested under controlled conditions of 23 °C and 50% relative humidity (RH) in a controlled test building. The dataset is provided as one consolidated Excel file and includes daily mass (weight) recordings for wet-cup (n = 5) and dry-cup (n = 5) configurations, along with the corresponding calculated outputs (e.g., vapour pressure difference Δpᵥ, vapour flux, permeance/permeability, vapour resistance, diffusion resistance factor µ, and equivalent air layer thickness Sᵈ). The data support reproduction, verification, and reanalysis of water vapour diffusion resistivity results under the stated condition.