A chimney cap seems like a small detail -a few pounds of metal sitting on top of your chimney -but it is doing critical work every day. It deflects rain that would otherwise fall directly down the flue and saturate the interior masonry. It prevents birds, squirrels, and raccoons from establishing nesting colonies in your flue. It reduces the entry of windblown debris that accumulates in the smoke chamber and creates blockages. And, depending on design, it can also help stabilize draft in windy conditions.
For Long Island homeowners, the chimney cap is especially important. Our coastal climate means significant rainfall, and the prevailing winds off the Sound and the Atlantic can drive rain at angles that overwhelm a poorly fitted cap. Salt air from coastal communities -from Long Beach and Lido Beach through Oyster Bay, Cold Spring Harbor, Northport, and the entire North Shore -is particularly hard on galvanized steel, which is why we only install stainless steel and copper chimney caps on Long Island.
Capstone Chimney & Masonry fabricates custom caps sized to the exact dimensions of each chimney we service. Off-the-shelf caps are manufactured in standard sizes and attached to the flue tile -they cover the opening but leave the crown exposed and often don't seal well against driven rain. Our custom caps are fabricated with a lip that covers the entire crown surface, with appropriate drip edges to direct water away from the masonry. For multi-flue chimneys, we fabricate a single cap that covers all openings in a single clean assembly, or individual caps for each flue, depending on the layout.
We offer stainless steel caps as our standard option -marine-grade stainless that will outlast cheap galvanized alternatives by decades. For homeowners who want to elevate the aesthetic of their home's roofline, we offer copper caps that add genuine character and develop a beautiful natural patina over time. Custom copper chimney caps are particularly popular on older colonials and Tudors throughout Oyster Bay, Garden City, Great Neck, and Manhasset.
Beyond weather protection, a properly fitted chimney cap with correctly sized spark arrestor mesh also provides important fire protection. In any area where sparks from the chimney could ignite roofing materials or landscaping, a spark arrestor is essential -and in many Long Island municipalities, required by code.
Contact Capstone Chimney & Masonry at (631) 449-3086 for a custom chimney cap consultation. We serve all of Nassau County and Suffolk County and can typically complete a cap installation in a single morning. Free estimates available for custom chimney cap installation anywhere on Long Island.