Renovation projects are undertaken to demonstrate home repair and building techniques in this Emmy-winning how-to program. Original host Bob Vila was replaced in 1989 after producers objected to his commercial endorsements. Steve Thomas took over until 2003, when he was replaced by Kevin O'Connor. Ace carpenter Norm Abram has been a staple of the show since its inception. Spin-offs include 'Ask This Old House,' while vintage episodes air on HGTV as 'This Old House Classics.'