Patent ID: 11905712
Assignee: CERTAINTEED GYPSUM, INC.
Field: Civil engineering (Other fields)
Classification: CPC E  C | IPC C  E

Claim 19:
20. A wallboard system comprising:
a first wallboard comprising:
a wall panel including a front surface, a rear surface, and opposing first and second side edges; and
a sandable coating disposed on the front surface of the wall panel;

a second wallboard comprising:
a wall panel including a front surface, a rear surface, and opposing first and second side edges, the second wallboard being positioned adjacent to the first wallboard so as to form a wall surface having a joint between the first and second wallboards; and
a sandable coating disposed on the front surface of the wall panel; and

a sandable joint compound covering the joint between the first and second wallboards, the sandable joint compound extending at least from the sandable coating of the first wallboard to the sandable coating of the second wallboard,, wherein
in each of the first wallboard and the second wallboard, the coating further includes an area of reduced thickness in a vicinity of at least one of the side edges that extends at least 1.5 inches from the respective side edge, and
in each of the first wallboard and the second wallboard, the wall panel includes a tapered portion extending from a respective one of the side edges, and wherein the area of reduced thickness extends to within 1 inch from an inner border of the tapered portion of the wall panel.