In Between: Designing Joints Within Façades

November 29, 2010
Publication: RCI Symposium On Building Envelope Technology
Author(s): Maing, Minjung

Abstract: How the façade elements join with the adjoining materials, assemblies, and systems should be considered early in the design phase. Left to the end, the joinery of the building systems creates abrupt conditions at terminations, transitions, and corners. This can, in turn, lead to building covers that do not address issues of thermal performance of materials, weather protection (including air infiltration and water penetration), fire resistance, and plumbing systems of the building. Although there are general guidelines for designing smaller joints such as sealantjoint performance parameters, wider joints such as expansion and seismic joints are underrepresented, creating delays and confusion during construction.|This paper will discuss how to detail the different types of joints, using case studies and examples of joints that were nonconforming and that were redesigned to comply with performance criteria. The principles presented are relevant to design and construction teams and researchers. It is critical that these joints be considered for the climactic conditions that façade assemblies are meant to address in order to design a holistic façade system with the desired performance requirements.