Do Unused Chimneys Need Ventilation? Yes, chimneys need to breathe, even if they won't be used anymore. ... A retired chimney should be sealed only at the top or bottom. This will allow air to pass through the chimney and help prevent problems caused by moisture.
Can you just cap a chimney?
Chimney caps protect the inside of your chimney and the inside of your home from weather damage and outdoor pests. Most people prefer to hire a professional when capping their chimney, but you can technically install a cap on your own.
Can I cap off an unused chimney?
Do Unused Chimneys Need Ventilation? ... A retired chimney should be sealed only at the top or bottom. This will allow air to pass through the chimney and help prevent problems caused by moisture. If your damper is near the firebox, you can use insulation to seal the chimney.
How do you cap off an old chimney?
Apply a bead of butyl rubber caulk around three sides of the chimney at the top, and set the cut piece of metal on the chimney so the edges line up with the caulk bead. Press the metal into the caulk. The goal of this metal cap is to prevent rain from coming in, but it shouldn't be an airtight seal.
Can you block off an unused chimney?
If you want an easy way to temporarily block and unused fireplace flue to stop a draft, you should consider installing a top sealing damper. This way you (or the next owner) have the option to have it open or closed at will.
How do you cap off a disused chimney?
Apply a bead of butyl rubber caulk around three sides of the chimney at the top, and set the cut piece of metal on the chimney so the edges line up with the caulk bead. Press the metal into the caulk. The goal of this metal cap is to prevent rain from coming in, but it shouldn't be an airtight seal.