Chimneys above the roof have a life span of 70 years or so before needing extensive repair. They are exposed to rain and wind more than other masonry on a house. The top courses of brick become saturated and are subject to freeze/thaw cycles. They also provide fertile sites for molds and vegetation. Deterioration around the flashing is also a problem area on old chimneys and often indicates the need to rebuild. Saturation of the masonry from gas appliance exhaust is another major factor in the destruction of old chimneys. This installment of Phillip Raines' series on chimney and fireplace renovation addresses rebuilding the chimney beginning 1 foot below the roof. The article covers chimney top design, scaffolding, tearing down the old chimney, building the chimney and removing the scaffolding.