A successful construction project relies upon good design, appropriate building materials, and the proper installation of those building materials. The contractor assumes a key role in each step of this process. When constructing complex building systems, contractors must display superior craftsmanship and correctly sequence the required steps in the installation process. In addition, contractors must maintain a high level of quality assurance and budget control in a safe working environment. Finally, the contractor must be well versed in the fundamental building sciences and code compliance that drive the overall performance of the installed system. The contractor members of the AWCI provide the high level of construction expertise and craftsmanship that is necessary to meet today’s evolving challenges.