The Building Diagnostics/Assessment division of HICAPS offers window testing and failure analysis to its clients as part of our “one stop shop” services approach. Our expertise in building diagnostics allows us to offer testing using a wind and rain maker. We have found there is a need for this service as it applies to new construction, repair of existing buildings and providing claims support. This test method is applicable to any curtain wall area or to windows, skylights and doors alone. On a more technical level referencing ASTM (American Society for Testing Materials) E331-00(2009) building standard which is Standard Test Method for Water Penetration of Exterior Window, Skylights, door and curtain wall by uniform static air pressure difference. This test method is a standard procedure for determining the resistance to water penetration under uniform static air pressure differences. The air pressure differences acting across a building envelope vary greatly. Note that under this test method, performance of a wall or its components, or both, may be a function of proper installation and adjustment.