Chimneys must maintain a watertight seal to protect their interior masonry and metal components to remain structurally sound. However, peaking above your roof, the chimney is exposed to various weather conditions throughout the year, making it susceptible to water damage and other problems. The flashing is a vital element in combatting a leaky chimney.
What is Chimney Flashing?
Chimney flashing is sheet metal installed in a specific manner to create a durable, watertight seal where the chimney meets the roof. Its primary function is to prevent water, snow, and pests from entering the vulnerable gap between the chimney and the roof, which can damage the masonry, attic, roof deck, and even the interior of your home. The proper installation, which we at Horizon Chimney Services are specifically trained in, is essential to prevent premature flashing failure.
Chimney Flashing Installation
The flashing must be installed in the following specific manner:
- Base Flashing: This first layer is attached to the roof and bent upwards against the chimney.
- Counter Flashing: This layer overlaps the base flashing and is embedded into the mortar joints. It's fastened to shed water away from the chimney.
- Step Flashing: Used on sloped roofs, step flashing consists of individual pieces of metal that are interwoven with the roofing shingles, creating a stepped pattern up the chimney.
- Cricket Flashing: A small, triangular-shaped piece of flashing used on the uphill side of the chimney to divert water around it. Crickets are especially important for wide chimneys.
Types of Flashing Materials
Several types of materials may be used, each with its set of advantages and disadvantages:
- Galvanized Steel is a common and affordable option but prone to rusting and corrosion.
- Stainless Steel is a more durable and corrosion-resistant option, offering a longer lifespan. However, even stainless steel can corrode if damaged.
- Copper is a premium material known for its longevity and aesthetic appeal.
Flashing Repair vs. Replacement
Whether to repair or replace chimney flashing depends on the extent of the damage. Minor damage, such as a small gap or loose material, may be repairable using a water-resistant sealant. However, replacement is usually the best option to ensure a long-lasting, watertight seal when flashing is rusted, corroded, or significantly damaged.
Chimney Flashing Repair Cost
The cost of chimney flashing repair or replacement varies depending on several factors, including the type of flashing material, the complexity of the job, and the location. To get an idea of the cost, it's best to get an estimate from a qualified chimney professional.
What Happens When Flashing Is Compromised?
Compromised flashing can lead to severe problems, including:
- Water Leaks: Water can enter the attic, roof deck, and interior walls, causing damage to insulation, drywall, and ceilings.
- Structural Damage: Water can rot wood and damage the chimney structure itself.
- Mold Growth: Moisture can create a breeding ground for mold, posing health risks.
- Masonry Deterioration: Water can damage the chimney masonry, leading to cracks and spalling.
Suspect a Leak? Get Help in A Flash
At Horizon Chimney Services, we understand the stress and urgency of water leaks. That's why we offer same-day emergency service for red tag emergencies and other urgent issues. Our fast and reliable response within our Eastern MA and RI service area gives you peace of mind that help is just a phone call away when you need it most, ensuring that your chimney problems are addressed quickly and effectively.
Horizon Chimney Flashing Repair – Call Now for An Estimate
Horizon Chimney Services – Your Local Hearth Expert. With over three decades of experience, homeowners in Westborough MA, Norfolk MA, Walpole MA, Cumberland RI, and surrounding eastern MA and RI towns have trusted our highly rated certified technicians for solving chimney flashing problems with expert inspections, repairs, replacements, and installations. Our extensive experience and expertise demonstrate our commitment to completing all chimney services with the utmost quality and satisfaction. Contact Horizon to schedule your visit today!