"THIS IS ONE OF THE MOST COMPLEX PROJECTS WE HAVE EVER WORKED ON." - RICHARD HAYDEN - AMERICAN HYDROTECH AND OSCAR WARMERDAM - SEMPERGREEN GREENING THE IMPOSSIBLE: THREE-DIMENSIONAL CORK-SCREW GREEN ROOF/ GREEN WALL The open and engaging landscape provides small and intimate spaces to gather and visit at all times of the day. For this visually attractive landscape Steven Holl Architects created a threedimensional green roof/wall design. It starts as a flat green roof, and then rotates into a green wall. Geoffrey Valentino - Landscape Architect from Edmund D. Hollander Designs - proposed the project to the collaborative team of American Hydrotech and Sempergreen USA to take on the task of 'greening the impossible'. The subsequent collaboration between Hydrotech and Sempergreen needed to address many of the issues with LIVINGARCHITECTUREMONITOR.COM creating a 3-dimensional, corkscrew shaped green roof and accommodating all of the other adjacent architectural elements. This collaboration required frequent communications with the design and construction teams. Richard Hayden, National Garden Roof Department Manager at American Hydrotech and Oscar Warmerdam, president of Sempergreen USA remarked: "This is one of the most complex projects we have ever worked on. It required a deep collaboration between our two companies and the design team." THREE DIFFERENT PLANT PALETTES AND MERGING SOIL MIXTURES American Hydrotech took on the responsibility of water proofLIVING ARCHITECTURE MONITOR / SUMMER 2020 / 21http://www.LIVINGARCHITECTUREMONITOR.COM