# Chimney Liners: How to Seal the Damper in a Fireplace
An open or unsealed fireplace damper can increase heating and cooling costs. When you are not using your fireplace, make sure to fully close the chimney damper. However, a closed damper is not enough to conserve energy; it should be sealed. Dampers are installed with sealant materials. If the seal is not tight enough, seal the chimney just below the damper to prevent any loss of hot or cool air through the chimney.
Things You'll Need
- Fireplace plug
Instructions
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1
Partially inflate a fireplace plug with its breathing tube. A fireplace plug is a inflatable, plastic pillow that is similar to a pool float.
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Push the fireplace plug into the top of the firebox using its handle.
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3
Set free end of the fireplace plug handle on the bottom of the firebox and adjust it so it continues to hold the fireplace plug up without assistance.
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4
Blow again into the tube until the fireplace plug is completely inflated. Then tuck the tube out of site. Keep the handle extended so the plug can be removed when needed. The fireplace damper is now sealed.
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Home Maintenance
- How to Seal the Exterior of a Broken Down Chimney
- How to Remove a Box Fireplace Damper
- How to Build a Fireplace Plug
- How to Seal a Chimney Indoors
- How to Remove a Fireplace Damper Assembly
- How to Fix the Draw in a Fireplace
- How to Slant the Wings of a Masonry Fireplace Chimney
- How to Seal the Flue for a Fireplace Insert
- How to Disconnect a Wood Fireplace
- What Do You Use to Seal the Bricks on a Fireplace Chimney?
- How to Remove the Damper From a Fireplace Insert
- What Is the Point of a Damper in a Fireplace?
