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Better Building Techniques by Henri de Marne A letter I received from a contractor attempts to make a case against drywall clips in two-stud corners, against 2x6 framing 24 inches on center, and against the use of joist hangers. Some builders find it difficult to accept or even consider newer building technology. Floating Corners A conventional three-stud corner, with the third stud nailed flat to provide nailing for drywall, does not provide adequate insulation. A 3½- or 5½-inch-thick fiberglass batt squeezed into a two- or four-inch space, respectively, reduces its Rvalue considerably. An alternative corner detail, which I wrote about last April, uses backup clips to hold the drywall instead of a third corner stud or grounds on top of partitions. The skeptics claim