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

Claim 0:
1. 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 the sandable coating of the first wallboard and the sandable coating of the second wallboard each have at least one visual characteristic that matches a visual characteristic of the joint compound, the at least one visual characteristic comprising one or more of
gloss, wherein a difference in gloss between each sandable coating and the joint compound is less than 5 gloss units;
surface roughness, wherein a difference between a surface roughness (Ra) of v coating and a surface roughness (Ra) of the joint compound is no more than 2 μm; and
color, wherein a difference between a color of each sandable coating and a color of the joint compound has a CIELAB ΔE* value of no more than 3.