As part of a VR Starting Grant, I run a four-year project at Applied Mechanics at Uppsala University focused on the multiscale interpretation of the hygromechanics of wood. This is done by combining atomistic modelling and continuum modelling through information transfer. This modelling platform is supported by non-destructive testing with small- and wide-angle X-ray scattering and X-ray computed tomography. In this proposal computational time is requested for the atomistic simulations of the interaction between moisture and the chemical components of the wood cell wall. Wood continuously interacts with moisture throughout its lifetime. However, not much is known about this behavior at nanoscale. Through recent developments, researchers now have access to the chemical structure of the cell wall and therewith the interaction between water and cell wall can be investigated with molecular dynamics simulations. The focus of the current study is to study this interaction, by first analyzing the cellulose, and thereafter the cellulose together with lignin and hemicellulose. One significant aspect of the study is the comparison with small- and wide-angle X-ray scattering to validate the numerical models and their results. These simulations will provide material properties and fundamental insights that can be inserted and complement finite element simulations. Preliminary results have been obtained in projects NAISS 2025/22-356 and NAISS 2024/22-233. However, the computations are becoming more resourceful, and I am continuously running out of computational time. Additional time is therefore needed to be able to move the research forward.