Plug the little holes in the envelope to keep your construction tight.
Ci’s core team consists of three of North America's leading building science experts, researchers and trainers. With their wide array of skill sets, they are the trusted authority for countless building professionals.
Welcome to Construction Instruction®
Construction Instruction (Ci) is a downloadable App for your mobile device that provides instant and reliable information on building products and materials, installation methods, technical data and much more.The app is designed for use by builders, contractors, architects, do-it-yourselfers and others looking for information on building products and their proper use and installation.