Gallery By Project Type Gulf States Building Gulf States Building Representative:Texas Fenestration, Inc. 2221 Justin Road #119-PMB 306 Flower Mound, Texas 75028 Project Category:Offices and Banks Architect:Merriman & Associates Contractor:Key Construction Location:Dallas, Texas Comments:Nineteen-story renovation project coordinated with Texas Historic Society and Landmark Commission. The 670 double hung windows feature custom grid and panning. The 5600 curtain wall features custom covers. Products Used: Series D300 Series T350 TerraStile® Series 670 (T) System 5600 2 1/4"