Shawn Torbert, M.S., CPHC/D, LEED AP, is the Commercial Design Sustainability Manager at GAF and Siplast. He studied molecular biology, philosophy, and writing at Lehigh University and holds a Master of Science degree in Sustainability Management from Columbia University. He’s a LEED AP, a Passive House Institute Certified Passive House Consultant/Designer and volunteers as a Passive House Trainer for the Passive House Network.

 Kristin Westover, P.E., LEED AP O+M, is a Technical Manager of Specialty Installations for Low-slope Commercial Roofing Systems at GAF. She specializes in Cold Storage roofing assemblies where she provides insight, education, and best practices as it relates to Cold Storage Roofing. She is also on the Building and Roofing Science Team where she works with designers to review project design considerations so they can make informed roof assembly decisions. She has experience with a wide variety of projects in the civil engineering consulting industry specializing in repair and restoration of existing buildings, primarily for commercial buildings and high rise residential structures. Kristin’s project expertise includes roofing, waterproofing, facades, parking garages, and pavements. She has performed assessments, written specification and design documents, provided bidding services oversight, and performed construction contract administration. Kristin also has experience in arbitration and litigation support as well as LEED O+M certification for existing buildings.