Chimney Crown Repair & Waterproofing

The chimney crown is the concrete or mortar slab that caps the top of the masonry chimney, directing water away from the flue and protecting the brick and mortar below. In the harsh New York climate — with its cycles of freezing winters, heavy spring rains, and humid summers — chimney crowns routinely crack and deteriorate, allowing water to seep into the chimney system. Water damage is the number-one enemy of masonry chimneys, leading to spalled bricks, failed mortar joints, deteriorated liners, and even structural settlement. Best Rosedale Chimney Sweep repairs damaged crowns using professional-grade elastomeric crown coatings and, when necessary, full crown rebuilding using a properly sloped mortar mix that sheds water efficiently.

Following crown repair, we apply a penetrating chimney waterproofing sealer to all exposed masonry surfaces. Unlike regular paint or sealers, vapor-permeable chimney waterproofers allow moisture to escape from within the masonry while preventing rain and snow from entering — the critical difference that protects the brick without trapping destructive moisture inside. This two-step crown repair and waterproofing combination is the most cost-effective way to extend the life of your chimney and avoid expensive interior water damage repairs down the road. We serve Rosedale, Laurelton, Springfield Gardens, and surrounding Queens communities.