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5 Common Roof Flashing Mistakes to Avoid

Flashing is an essential component of any roofing system as it prevents water from penetrating the roof’s vulnerable areas. This is why it is crucial to ensure that the flashing is installed correctly and maintained properly. While flashing installation may seem like a simple task, it is easy to make mistakes that can lead to significant water damage and expensive repairs. In this article, we’ll discuss five of the most common roof flashing mistakes and how to avoid them.

1. Not Using Enough Flashing

One of the biggest mistakes people make when it comes to roof flashing is not using enough of it. Insufficient flashing may seem harmless but can lead to leaks down the road. Flashing must be installed in all of the areas where the roof intersects with other structures, such as chimneys, skylights, and vent pipes.

2. Poorly Sealed Flashing

Flashing is only effective if it is properly sealed. Unfortunately, even a small gap can leave the roof vulnerable to water penetration. Improperly sealed flashing is a common problem when the installer is inexperienced or takes shortcuts. To avoid this, ensure that the flashing edges are adequately sealed with caulk.

3. Not Removing Old Flashing

When replacing a roof, it is essential to remove all of the old flashing. If the old flashing is left in place, it can result in leaks, damaged shingles, and other problems. This is because flashing that is not installed properly can cause water to seep through and cause water damage to the roof.

4. Using Incorrect Materials

Using the wrong materials for flashing is another mistake that can compromise the effectiveness of the roofing system. Incompatible materials can react with each other, leading to corrosion and breakdowns. Make sure to consult a professional whether your flashing is installed with the appropriate materials.

6. Incorrect Flashing Placement

Flashing must be installed in the right spot to accomplish its goal of preventing water penetration. If flashing is placed improperly or installed in the wrong spot, it’s ineffective. This is particularly true concerning vent pipes and chimneys. To avoid this mistake, make sure to work with experienced roofing professionals who know exactly where to install the flashing.


Flashing is critical to the overall effectiveness of your roof. Unfortunately, it is easy to make mistakes that can compromise its effectiveness. Ensuring that the flashing is installed correctly and maintained adequately is crucial to protecting your roof and avoiding expensive repairs. Contact Reliable Roofing & Construction in Hattiesburg, MS, today for professional installation, repair, and maintenance services. Our team of professionals has the expertise to help ensure that your roof is in top shape for years to come.

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