Exterior and Concrete Siding Material In one of the last industrial pockets of West Town, UrbanLab’s Martin Felsen and Sarah Dunn created a modern live-work space that speaks to the neighborhood’s history in form and function. The Dukane Precast concrete panels were acid-etched for a more finished look.  Photo 2 of 5 in Editor's Picks: 5 Groundbreaking Prefab and Modular Homes from In Just 48 Hours, a Chicago Live/Work Space Is Built from the Ground Up Using Concrete Panels