The Belgium international, who can operate at right-back or centre-back, has signed a two-year deal with the option of an extra year.
Albion boss Tony Mowbray said: "Carl really impressed me both times he played against us last season."
Copyright (c) PA Sport 2007, All Rights Reserved.
Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: http://gms.to/writeforgms