Bath Room and Ceramic Tile Wall Selective D.I.YNix and Novak-Zemplinski made the narrow concrete sinks with tilted basins in the bathrooms. “We couldn’t find any sinks we liked,” says Nix. “So we decided to make our own. But those are the most expensive sinks ever, at least in terms of man-hours.” Novak-Zemplinski concurs—while they are happy with the way the sinks turned out, “one of the lessons we learned is that some things are not worth doing yourself.”  Photo 9 of 9 in Warsaw Loft with Multifunctional Furniture