Going for maximum airiness, Luke and Clint gave this space a 20-foot-high ceiling and two-story windows. It’s cozied up by a gas fireplace clad in smooth cedarwood, with soapstone on the hearth. Aggregate concrete floors with embedded river rocks stand up to occasional basketball dribbling. The 1960s leather sofa and the rockers are from Boise Vintage—Luke had the chairs reupholstered in buffalo check fabric from JoAnn.