The objective for this work was to prepare a project plan for the development of moisture management guidelines to maximize durability of wood-based building systems. Exploration of the complexity of the technical issues involved led the conclusion that access to the use of a reasonably accurate computer model was needed to explore the performance of systems we feel have shown good track performance. Essentially, parametric sensitivity studies are needed, both to confirm the suitability of walls built in the different regions of the country based on the current field experience, and to extrapolate limits to these systems that might also be used as a guide for unconventional systems. With this assurance, information of the performance of typical wall systems as a function of the variables noted in this report should be obtained by modelling. It should then be possible to develop or assist in the developing of simpler user-friendly design tools for the building industry which incorporate advice on good construction practices.