University of Oregon-Portland
White Stag Building
70 NW Couch, Room 142/144
This month our Portland BEC President, Dave Young, will present information on blistering in polyurethane membranes.
Water-filled blisters under cold-applied, asphalt-modified elastomeric polyurethane waterproofing membranes have been discovered on numerous buildings in the Pacific Northwest in recent years, often requiring replacement of the membrane. This presentation explains the phenomena of osmotic flow through polyurethane waterproofing membranes and presents strategies for addressing this problem through design.
Mr. Young has focused his career on building enclosure consulting over the past 21 years. His experience includes low to high-rise commercial, institutional, and multi-family residential buildings. Dave is a licensed professional engineer in Oregon and has a Bachelor degree in civil engineering from Carleton University in Ottawa, Canada. He is a principal of RDH Building Sciences, Inc.