add: "Supporting Verification MaterialsAlthough some elements of a green home can be easily verified through simple observation, many of the specific LEED for Homes requirements are difficult to verify without additional information - product specifications, contractor calculations, etc. The term "supporting verification materials" refers to the additional information that Green Raters may need in order to fully verify that the home has met the criteria for LEED certification. Supporting verification materials are not formal submittals, and no outside consultant should be needed to assist with the compilation of these materials. In some cases, these materials may not be required; in other cases, additional information may be requested, subject to the discretion of the verification team.The supporting verification materials for each prerequisite and credit are described throughout this Reference Guide."