Predicting Rooftop Surface Temperature Extremes and Impact on Air Barrier Tie-Ins 1.0 CEU/HSW
September 18 @ 1:00 pm - 2:00 pm EDT
Predicting Rooftop Surface Temperature Extremes and Impact on Air Barrier Tie-Ins
Roofing system surfaces can get hot, sometimes extremely hot due to climatic and indoor design conditions, direct and reflected solar radiation exposure, and radiative heat transfer with surrounding objects. Roof surface color, the position and color of adjacent objects, as well as the thermal properties of materials are key parameters that greatly influence roofing system peak temperatures. An adjacent parapet wall, metal coping cover may experience similar surface temperature conditions. Critical rainwater and air control layers transition between roofing and façade systems at the parapet. Designs are complex and rely on tie-ins to allow for differential movement between the parapet wall and roof membrane. Transition membranes many times address scope-of-work issues between roofing and wall air barrier system trade responsibilities. Flashing membranes that maintain the continuity of air and water-resistive barrier systems have upper service temperature limits that vary between 180°F and 300°F. Identifying the parameters controlling climate specific, rooftop surface temperature extremes will help designers specify the thermal performance requirements for flashing membranes.
Learning Objectives:
Participants will be able to list the key factors influencing tie-in temperatures for continuous air barrier systems across roof, parapet, and façade assemblies.
Participants will understand the impact of solar reflection from adjacent elements on roof, parapet, and façade system temperatures, and identify scenarios that may require high-temperature-rated air barrier system tie-in membranes.
Describe the process to simulate and visualize roof, parapet, and facade system heat transfer.
Participants will understand how temperature rating requirements for tie-in membranes vary across climate zones.
Stanley D. Gatland II, Manager, Building Science and Comfort, Saint-Gobain North America
Stan Gatland is the Manager of Building Science and Comfort for Saint-Gobain North America. He is responsible for leading projects that focus on developing, demonstrating, and connecting Saint-Gobain/CertainTeed solutions to the performance of buildings regarding indoor environmental quality and occupant comfort. Stan has over 30 years of experience and expertise in building science and architectural acoustics with an extensive professional network in the fields of energy efficiency, heat and moisture transfer, environmental acoustics, and fire science. He is an accomplished speaker with over ninety publications. Stan holds a master’s degree in mechanical engineering from the University of Massachusetts, Amherst.