Special thanks to the following for their contribution to this project: AAMA; Thermal Industries, Inc.; Royal Crown Limited; MEA Engineers; Dayton Technologies; Kroy Building Products; L.B. Plastics; Erwin Industries, Inc.; Bufftech; Pure Strategy; Country Estate; Railing Dynamics, Inc.; Avcon. Note, Pure Strategy, a consulting firm, graciously provided proprietary data on costs and trends to support this document.