Sheetrock has different thicknesses, which each have different weights; one-quarter-inch Sheetrock weighs 1.2 pounds per square foot, three-eighths-inch Sheetrock weighs 1.4 pounds per square foot, one-half-inch Sheetrock weighs 1.6 pounds per square foot and five-eighths-inch Sheetrock weighs 2.2 pounds per square foot. Sheetrock is a specific brand of gypsum wallboard produced by the USG Corporation of Chicago.
The availability of different thicknesses of Sheetrock provides some versatility in terms of the ranges of applications for finishing interior walls. The one-half-inch panels are well suited for most residential interior walls, and one-half-inch or five-eighths-inch panels work well on ceilings. The three-eighths-inch panels are suitable for repair or remodeling projects or for a double-wall system over a wood frame. The one-quarter-inch panels are a better choice for a wall with curve.