This document specifies requirements and methodologies for infrared thermographic services for detection of heat, air and moisture irregularities in buildings that help users to specify and understand (i) the extent of thermographic services required, (ii) the type and condition of equipment that must be used, (iii) the qualifications of equipment operators, image analysts, and report authors and those making recommendations (iv) the requirements for reporting results, and (v) have a guide to understanding and utilizing the final results stemming from provision of the thermographic services This part of ISO 6781 is applicable to the general procedures for infrared thermographic methods as may be applied to residential, commercial, and institutional & special use buildings.