Chimney flashing is a critical component of any roofing system. It is installed around the base of the chimney where it meets the roof to prevent water from entering the home through the gap between the chimney and the roof. Without proper flashing, water can seep into the attic or walls, causing damage to the structure and leading to costly repairs.
This blog will discuss what chimney flashing is, its parts, why it is essential, and how to know when it needs repairs.
What Is Chimney Flashing?
Chimney flashing is a strip of metal, typically made of aluminum, copper, or galvanized steel, installed around the base of the chimney to seal the gap between the chimney and the roof. It is designed to prevent water from entering the home through the chimney and causing damage. A professional roofer installs flashing while installing a new roof or replacing an existing roof.
What are the parts of the chimney flashing?
Chimney flashing has three main parts to help protect your home from water damage:
- Base flashing – This is part of the flashing installed under the roofing material and against the chimney. Flashing is made of a single piece of metal bent to fit the contours of the duct and roof.
- Step flashing – Step flashing is installed between each course of shingles and the chimney. It is made of small pieces of metal placed in an overlapping pattern.
- Counter flashing – This piece is installed over the base flashing and into the chimney’s mortar joints. It is designed to cover the top of the base flashing and creates a watertight seal.
Why Is It Important?
Chimney flashing is essential for preventing water from entering the home through the chimney. Water can cause damage to the structure of the house, including rotting wood, mold growth, and even structural damage. Additionally, water damage can lead to costly repairs and even impact the health of the home’s occupants.
Proper chimney flashing also helps to prevent pests, such as rodents and insects, from entering the home through the chimney. It also helps to improve the home’s energy efficiency by preventing drafts from entering through the chimney.
How Do I Know When My Chimney Flashing Should Be Repaired?
With flashing jobs costing between $400 and $1,600, knowing when you can do minor repairs to reduce costs is essential. To determine if your chimney flashing needs repairs, here are several signs you should check for:
- Water stains on the ceiling or walls near the chimney can indicate that water is entering the home through the chimney and causing damage.
- Loose or missing shingles near the chimney can suggest the step flashing is not correctly installed, allowing water to enter the home.
- Rust or corrosion on the flashing can weaken it and lead to leaks.
- Cracks or gaps in the mortar joints around the chimney may indicate that the counter flashing is not correctly installed or has become detached.
Chimney flashing is an essential component of any roofing system. It is designed to prevent water from entering the home through the chimney and causing damage to the structure. If you suspect that your chimney flashing may need repairs, it is vital to have it inspected by a professional roofer as soon as possible. Proper maintenance and repairs of your chimney flashing can help to protect your home from water damage and improve its energy efficiency.
Are you looking for a roofing professional near you? Contact us at Herbert Roofing today.