Through the seasons, the top of your chimney (known as a chimney crown or chimney wash) takes quite a beating. Over time, the elements can wear down the topside of a chimney, causing cracks and voids where water can intrude and cause further damage down along the chimney body during a freeze/thaw process. In certain instances, when a chimney top is not too badly worn or deteriorated, resurfacing the chimeny top is a vialbe repair option. Chimney Pros uses a fiberglass reinforced fine aggregate masonry mix to resurface our chimney tops. The embedded fiberglass allows for a stronger surface structure and will prevent premature cracking and deterioration compared to a traditional mortar mix.