Story at a glance: GCP’s 6Sides+ system delivered airtight and watertight results on a complex health care build in Seattle. The world-class project spans approximately 60,000 square feet of vertical waterproofing surface and focuses solely on wall assemblies. Providence Swedish, a leading health care campus in Seattle, is expanding with the North Tower development. This […] The post GCP’s 6Sides+ System Sealed Seattle World-Class Medical Tower appeared first on gb&d magazine.