Chimney Repair is our top priority! Give us a call today to hear about how we can he3lp you. Chimney cement crowns are the strength, or weakness, of a masonry chimney. Crowns in poor condition let water deeply into the chimney and then you have a soaked masonry jar. A timely repair to this part of the chimney can save thousands of dollars in future damage. Either a new cement crown or repair with an elastic material is determined by the state of deterioration. Other small repairs to a chimney are usually not expensive.