An experienced green contractor should be able to explain to the homeowner not only the recommendations, but also the science behind those recommendations. In fact, most believe that educating the homeowner is an expected part of a green contractor's job. How will he approach the education aspect of the project?
Some green contractors offer entire manuals that detail every step of the green design and construction process. They deliver these documents to the homeowner either during the bidding process or on the first day of the job. Others have such documents available on their Web sites.
Any educational materials offered by the contractor should explain the science in layman's terms. The homeowner should be able to understand the materials without having to consult a dictionary, and terms particular to the construction business, especially green construction, should be clearly defined.
Each of the contractors -- plumber, interior designer, HVAC installer and roofing professional -- should come prepared to educate the homeowner and explain what recommendations are offered and why.
In the end, homeowners should have a whole-home green house, and they'll be able to explain to friends and neighbors all that was involved and why they're proud of their new, green (or greener) home.