The Columbia Place Apartments are located in NW Washington, D.C. and has 200 over studio, one bedroom, and two-bedroom apartments available for rent. The apartment building is 110 feet high and features a rooftop deck, recreation space, pool deck with a grill area, a fire pit, and lounge seating for residents to enjoy. The apartment building also contains an underground parking garage for residents. There is also approximately 3,000 square feet of designated retail space for residents to shop. For this project team of building scientist installed an air barrier system. An air barrier is a system that’s designed and constructed to control air flow between a conditioned space and an unconditioned space. Air barrier systems solve common building environment problems by creating a seamless moisture barrier with no tears, holes or “mis-lapped” joints, effectively blocking air leakage, and reducing energy costs and the risk of condensation in the wall. Air barriers also protects sheathing and rough openings from weather damage during and after construction. Additionally, air barriers provide the opportunity for pressure-equalized or pressure-moderated wall design. This minimizes the risk of rainwater penetrating through any type of wall assembly.