This report describes key results of the Decision Aids project for 1999-2001. This project seeks to partially fulfil Forintek's need for a "Durability by Design" component in its durability program. The project's objective is to participate with the building industry in improving design and construction practice to ensure the long-term performance of wood. Methods include assisting in better technology transfer of known information, and initiating research projects to fill in information gaps. Key results were further development of strong ties within the building industry and the building science research community; development of a content-rich public web site on durable wood design and construction; development of other technology transfer vehicles for information on best use of wood for durable construction; extensive participation in two leading North American research consortia on durable wood construction; and, two spin-off research projects.