View 373 ideas sketched from some of the most creative minds at Greenbuild in Boston. If you weren’t able to visit this year’s Oldcastle BuildingEnvelope® booth, designed by the Rockwell Group, you can enjoy some of it right here. We invited all of our booth visitors to participate in our creative Sketch Wall. Visitors hung their creative ideas, filling our gallery wall. Take a moment to scroll through and click on these amazing works of art for a closer look.