Chimney Damper Installation on Long Island

Your chimney damper controls airflow through the flue. When your fireplace is in use, the damper opens to allow smoke and combustion gases to exit safely. When the fireplace is idle, the damper closes to prevent conditioned air from escaping and outdoor air from entering.

Many Long Island homes have original cast iron throat dampers that have warped, rusted, or broken after decades of use and exposure to corrosive flue gases. A damaged damper that won't seal properly is costing you money every minute of every day.

Capstone Chimney specializes in top-mount damper installation, our recommended solution for Long Island homeowners. Unlike traditional throat dampers, top-mount dampers:

- Create a rubber gasket seal at the top of the flue, stopping 100% of air exchange when closed - Function as a chimney cap, keeping rain, snow, animals, and debris out - Are operated from inside by a simple stainless steel cable - Last significantly longer than throat dampers because they're made of stainless steel - Are easier to inspect and verify they're fully sealed

We also install and replace traditional throat dampers when that's the appropriate solution for your chimney configuration.

The energy savings from a properly functioning damper are real and measurable. The Department of Energy estimates that a leaking or missing damper can account for up to 8% of total home heating loss. On Long Island, where heating costs are among the highest in the nation, a new top-mount damper can pay for itself within a few heating seasons.

Every damper installation includes a smoke test to verify proper operation and a walkthrough on how to use your new damper safely and effectively.