Quantities. It takes lots of materials to build a house. On this day 18,800 pounds of gypsum wallboard (aka drywall, GWB) was delivered and placed throughout the house. Some of it boomed through our second floor deck doors.
Neil went with 5/8" throughout the house instead of the typical 1/2". This adds a little more sound insulation. That along with our blown-in insulation and triple pane windows should make the house pretty darn quiet.