Chimney Liner Installation on Long Island

The chimney liner (also called a flue liner) serves three critical functions: it protects your home's structure from heat transfer, contains combustion products and directs them safely outside, and protects the chimney masonry from corrosive flue gases.

Many Long Island homes, especially those built before 1940, may have unlined chimneys or deteriorated original clay tile liners. Both conditions are serious safety hazards. An unlined chimney allows heat to transfer directly to adjacent wood framing, and cracks in clay tile liners can allow carbon monoxide and other combustion gases to enter your living spaces.

Capstone Chimney installs premium stainless steel chimney liners that are UL-listed and tested to the highest safety standards. Our liners are available in 304 and 316 alloy stainless steel. 316 alloy is recommended for oil-burning and coal-burning applications due to its superior resistance to acidic flue gases.

Proper liner sizing is critical. An oversized liner creates poor draft, leading to smoke problems, excess creosote, and inefficient combustion. An undersized liner can create dangerous pressure conditions and excessive temperatures. We calculate the correct size using industry-standard methods based on appliance BTU output, fuel type, chimney height, and configuration.

Our installation includes the liner, insulation wrap or pour-in insulation for maximum efficiency, a top plate and rain cap, a storm collar for weather sealing, and connection to your appliance with appropriate adapters. Every installation is performed to manufacturer specifications and local code requirements.

Stainless steel chimney liners carry a lifetime manufacturer warranty and, with proper maintenance, will outlast the chimney itself.