When it comes to understanding the structure of a roof and its various components, one crucial element that plays a significant role in preventing leaks is flashing. Flashing is a thin, durable material that is typically made of aluminum, steel, or another weather-resistant metal. Its purpose is to redirect water away from vulnerable areas where two different roof surfaces meet, such as where the roof meets the chimney, skylights, or vent pipes. Flashing is essential for maintaining a watertight seal and protecting the integrity of the roof. However, a common question that arises regarding flashing installation is whether it is possible to put flashing over shingles on the roof. Let’s dive into this topic and explore the answers.
Understanding the Role of Flashing
Before we delve into the question at hand, let’s first understand the importance of flashing. Flashing serves as a waterproof barrier, preventing water from seeping into openings and causing damage to the underlying structure of the roof. It is specially designed to channel water away from these vulnerable areas, ensuring that it flows harmlessly off the roof and into gutters or downspouts. By creating a tight seal between different roof surfaces, flashing guards against water infiltration and helps maintain the longevity and durability of the roof.
Proper Installation Methods
When it comes to installing flashing, proper techniques and practices are vital to ensure its efficiency. Typically, flashing is installed beneath the shingles, allowing it to direct water away from vulnerable areas. This method of installation ensures that the flashing is well-protected from the elements and securely sealed to the roof. While flashing under the shingles is the most common and effective installation method, there may be situations where adding flashing over existing shingles may be considered.
Installing Flashing Over Shingles: Pros and Cons
While installing flashing over shingles is not the standard method, there are scenarios where it may be appropriate. However, it is essential to weigh the advantages and disadvantages before making this decision.
Advantages of Installing Flashing Over Shingles:
- Convenience: Installing flashing over existing shingles can be more convenient and time-saving compared to removing the shingles and installing flashing beneath them.
- Aesthetic Appeal: If the roof has shingles that are in good condition and replacing them is not desirable, installing flashing over the shingles can maintain the visual appearance of the roof.
Disadvantages of Installing Flashing Over Shingles:
- Increased Risk of Leaks: When flashing is installed over shingles, it may not create as watertight of a seal as it would if installed beneath them. This method increases the risk of water seeping underneath the flashing and causing leaks.
- Decreased Longevity: With flashing installed directly on top of shingles, it is more exposed to the elements, such as wind, rain, and UV rays. This exposure can lead to premature deterioration of the flashing, reducing its lifespan.
- Potential Compromised Esthetics: While installing flashing over shingles can help maintain the aesthetic appeal of the roof in some cases, it may also result in a less visually pleasing appearance if not done meticulously. The added layer can create uneven surfaces and an unnatural look.
Professional Consultation is Key
When deciding whether to install flashing over shingles, it is crucial to consult with a professional roofing contractor or an experienced roofer. They will assess the condition of the shingles, evaluate potential risks and benefits, and provide the most appropriate and effective solution for your specific roofing needs.
While installing flashing beneath shingles is the standard and recommended method, there may be cases where installing flashing over shingles is a viable option. However, the decision should not be taken lightly. It is essential to consider the potential risks, such as increased leaks and decreased longevity, along with the benefits of convenience and maintaining the roof’s esthetics. Consulting with a professional roofing expert is vital to make an informed decision and ensure the integrity and longevity of your roof.