Chimney Flue Damper - How to Install Chimney Flue Damper Step-By-Step

Picture of Chimney Flue Damper - How to Install Chimney Flue Damper Step-By-Step

Installing a lock top chimney damper can be a great way to prevent any energy leakage from your home caused by a chimney. Chimneys can be a major factor in losing heat in the winter and air conditioning in the summer. If you currently have a throat damper in your chimney, which many homes do, it can still leak energy. Throat dampers do not have a gasket, making it so the damper can never be 100% closed. A lock top chimney damper has a gasket at the top of the chimney to ensure an air tight seal every time. Lock top chimney dampers also act as a rain cap, keeping rain and critters out of your chimney. Lock top chimney dampers are economical and are designed for any do-it-yourself homeowner to install.

Take these steps and you will know how to seal off your chimney today. This link shows a wide variety of top locking dampers. Stop the drafty chimney.  Heating and cooling gets expensive; a top lock chimney damper can pay for itself in no time.

Warning: Top lock chimney dampers should not be used with gas log fireplaces.

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Step 1: What Do We Need?

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When you purchase a top lock chimney damper, it comes with 30' wire cable, allen wrench, 2 anchor nails, mounting bracket, and tube of silicone cement. Tools you will need are a drill with 1/4" masonry drill bit, hammer, and wire cutters.

Step 2: Spread Silicone On The Top Of The Chimney Flue

Picture of Spread Silicone On The Top Of The Chimney Flue

Start by puncturing the tube of silicone with the cap, and spread a 1/4" bead of silicone around the top of the chimney flue.

Step 3: Place Damper On Chimney Flue

Picture of Place Damper On Chimney Flue

Lower the wire cable into the chimney. Make sure that the cable does not kink and get tangled while being inserting down the flue. Firmly place the chimney damper on the top of the silicone filled top of the flue. Make sure that the damper is centered on the flue and the entire flue is covered by the damper. Fill any remaining gaps with silicone.