"Rebuild" is a song written by Jon Foreman of Switchfoot and Matt Thiessen of Relient K. The song was written in conjunction with the bands' 2007 Appetite for Construction Tour, featuring members from all three bands on tour, Switchfoot, Relient K, and Ruth. Matt Thiessen sang second vocals, and Dustin Ruth of Ruth played harmonica.All proceeds from the song download will be donated to Habitat For Humanity.