At this point you may know you need a new roof, but are trying to decide between re-roofing (installing a new layer of material over the existing one), or doing a complete replacement by tearing the old one off. In some cases you may be sure there is no damage underneath. However, if there is possibility of damage, you will want to consider a full roof replacement. Doing a full re-roof will ensure that any structure damage is caught. By tearing off the old roof, any damaged areas underneath will be discovered and repaired to prevent future, and more serious, damage.
