Defects: These are the flaws that are introduced through poor design, poor workmanship before a structure begins its design life or through inadequate operation and maintenance during its service life Repair: Process of reconstruction and renewal of the existing buildings, either in whole or in part Renovation: Process of substantial repair or alteration that extends a building's useful life. Remodeling: Essentially same as renovation - applied to residential structures. Rehabilitation: An upgrade required to meet the present needs - being sensitive to building features and a sympathetic matching of the original construction or the process of repairing or modifying a structure to a desired useful condition. Restoration: The process of re-establishing the materials, form and appearance of a structure. Renovation: Process of substantial repair or alteration that extends a building's useful life. Remodeling: Essentially same as renovation - applied to residential structures. Rehabilitation: An upgrade required to meet the present needs - being sensitive to building features and a sympathetic matching of the original construction.