Also registered as Wheaton Sprague Building Envelope, the company provides design, engineering, science and consulting for building facades and building enclosures on commercial buildings, emphasizing vertical facades, but also capable in other forms and functions of the total enclosure. WS delivers these services nationally and internationally through two divisions: Building Envelope Engineering Division Building Envelope Consulting Division Core Values: Collaborative Integrity Client Conscious Communicative Capable Our Uniqueness: Pragmatic Solutions based on holistic approach beginning with the End in Mind. Collaborative and aligned internally and externally. 100% focus on building envelope and architectural components. Broad competency covering the complete enclosure. We understand client's needs. More on the Building Envelope: It is the physical separator between the interior and exterior environments of a building, also called "building enclosure", "curtain wall" or "facade". It serves as the outer shell to help maintain the indoor environment and facilitate its climate control. Building envelope / curtain wall design is a specialized area of architectural and engineering practice that draws from all areas of building science and indoor climate control.