NW Glisan Street was originally completed in 2000, therefore the building was not designed to current seismic code. To bring the building up to current code, R&H teams used silicone sheets during the building’s reconstruction. These sheets not only permit flexibility of the design to the building’s structure, they also act as a weather barrier. The sheets, thin flexible membranes, sit against the side of the structure and allow the building to drift up to 2.5” in the event of an earthquake without compromising the weather barrier. This 2.5” of drift is equal to an additional 200% of elongation movement and 75% compression movement, giving the building’s envelope the movement needed to better withstand an earthquake.