Flashing acts as a barrier, directing water away from vulnerable areas such as joints, vents, and chimneys. Unfortunately, improper installation could compromise the effectiveness of flashing, leading to leaks and other problems. Identifying these errors early can save homeowners great time and money on repairs.

Let’s look into the most common flashing installation mistakes and how to effectively resolve them.

Incorrect Material Choice

Common flashing options include metal, rubber, and plastic, each with distinct properties suited for different applications. Metal flashing, often made from aluminum or copper, is highly durable and resistant to corrosion. This makes them ideal for roofs in varying weather conditions. Although rubber flashing is flexible and can adapt to uneven surfaces, exposure to UV light over time may cause it to deteriorate. 

Homeowners should evaluate the specific conditions where flashing will be applied, considering factors such as climate, roof type, and potential expansion or contraction of materials.

Inadequate Sealing Techniques

Improper sealing techniques can result in gaps or weak points where moisture can enter structures. Common errors include using the wrong sealant type, failing to apply sufficient sealant, or neglecting to follow manufacturer recommendations regarding application methods. Using a low-quality sealant may also lead to early degradation of the flashing. 

Owners should also consider the weather conditions during application, as extreme temperatures can affect sealant performance. It’s important to conduct regular inspections and maintenance to help identify areas needing resealing before they become problematic.

Poor Placement and Alignment

When flashing components are improperly positioned, water may pool or flow in unintended directions, leading to leaks and structural damage. Common pitfalls include inaccurate measuring, misaligned flashings, and using inappropriate fasteners. For example, flashing around chimneys should extend a few inches above the roof surface to guarantee water flows away from the chimney. 

Homeowners can ensure proper flashing placement by consulting a custom fabricator who uses precise measuring techniques to guarantee the best fit. 

Unaddressed Corrosion

Rust and corrosion can develop in metal flashing due to prolonged exposure to moisture, humidity, and other environmental factors. This weakens the metal and creates vulnerabilities where water can enter the structure. Neglecting regular inspections and maintenance could worsen the issue over time. 

Property owners should routinely inspect metal flashing for signs of corrosion or damage and promptly address them by repairing or replacing any affected areas. Implementing regular cleaning and lubrication can help extend the lifespan of metal flashing.

Failing to Counterflash Termination Bars

Termination bars, typically used to join flashing to a water-resistant barrier material like ice and water shield, may not always fit correctly. Leaving gaps around these bars could allow water to enter. Homeowners should consult custom flashings fabricator to ensure counterflashing fits appropriately, thereby reducing the likelihood of water penetration.

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If you're looking for custom flashing structures for your home’s roof, we at Sheet Metal Squad are here to help. Our experienced team can custom design and fabricate the perfect flashings for your roof, ensuring a watertight seal and optimal performance. Contact us today to schedule a consultation!