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Installing a spark arrestor on your home’s chimney is an essential task. It reduces fire risk and ensures your chimney is compliant for insurance and building code purposes. Not having a spark arrestor could invalidate your home insurance or cause snags when it comes to a house sale.

Yes, you should seal and cap an unused chimney to protect it from damage. Sealing the structure helps prevent moisture damage, which can lead to issues like cracks, spalling, efflorescence, and damaged mortar joints. Capping the chimney is also crucial to prevent blockages, damage from invasive critters, and downdrafts, while still allowing for proper air ventilation to manage moisture. For the best results, consult a chimney professional to select the right type of chimney or flue cap for your home. It's also wise to continue with annual chimney inspections to maintain the structure's integrity.

Chimney caps are necessary both from a building safety standpoint in most municipalities and to keep your home protected from a variety of issues. Chimney caps are not only mandated by building code in most areas, but they also serve to keep squirrels, raccoons, and other pests out of your home, as well as snow and rain. Therefore, they help to avoid property damage, making them a worthwhile investment.

You should never block both the top and bottom of your chimney. Proper airflow is essential because the temperature inside the chimney will still fluctuate as your house warms and cools. Moisture can build up without ventilation, leading to dampness in your walls over time. Blocking the top prevents debris and animals from entering, but the chimney still needs air circulation to avoid condensation issues. Allowing the chimney to breathe maintains the health of your home and prevents long-term damage.