Building product manufacturers often provide guide specs to specifiers for use as starting points in the writing of project specifications. A simple guide spec is a useful tool, but much more can be accomplished when a manufacturer understands the guide spec’s potential. A well-crafted guide spec, employing CSI’s principles of specifying, can educate the design professional, hold the keys to successful installation, and build trust between the manufacturer and the design team. This course, led by two experienced specifiers with expertise in guide specification writing, will help suppliers identify whether a guide spec would be a valuable addition to the product literature. The course will offer insight into preparing documents that will be valuable to design professionals, contractors, and customers.