[3] When his previous project The Final Offering fell apart before it got off the ground in 1988, William DuVall formed No Walls with Hank Schroy and Matthew Cowley later that year, taking up lead vocal duties for the first time.

[1][2] Regarding his experience in this project, Duvall said: No Walls generated much interest after giving a demo to Vernon Reid backstage after a show.

[2] David Frick of Rolling Stone described one of their shows as "a brilliant collision of sinewy punk attack, angular-jazz maneuvers and catchy art-pop songwriting.

[1][2] Since the break-up of No Walls, DuVall has founded and fronted two other bands called Madfly and Comes with the Fall, releasing several albums between both those projects.

He is currently fronting Alice in Chains in place of their original lead singer Layne Staley, who died in 2002 after a long battle with severe drug addiction.