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When it comes to maintaining the integrity of your roofing system, every detail matters. One critical component that often goes unnoticed is the drip edge flashing and its proper installation relative to the underlayment. In this blog post, we'll explore what drip edge flashings are, why it's essential for the underlayment to go over the flashings at the eaves, and the benefits of this installation method.
What is Drip Edge Flashing?
Drip edge flashing is a metal strip installed along the edges of the roof. Its primary purpose is to direct water away from the fascia and underlying roof components, preventing water damage and ensuring the longevity of the roof. Drip edge flashings are typically made of galvanized steel, aluminum, or other durable metals and are installed at the eaves and gable ends of the roof.
The Role of Underlayment
Roofing underlayment is a water-resistant or waterproof barrier material installed directly onto the roof deck, beneath all other roofing materials. It provides an extra layer of protection against water infiltration, especially during severe weather conditions. Common types of underlayment include asphalt-saturated felt, synthetic underlayment, and rubberized asphalt.
Why Should Underlayment Go OVER Drip Edge Flashings at the Eaves instead of under?
1. Enhanced Water Shedding
One of the primary reasons for placing the underlayment over the drip edge flashing at the eaves is to enhance water shedding. When the underlayment is installed over the drip edge, it ensures that any water that penetrates the roof covering flows down the underlayment and onto the drip edge, which then directs the water away from the fascia and into the gutters. This method prevents water from seeping behind the flashing and causing potential damage to the roof deck and fascia board.
2. Preventing Water Infiltration
Installing the underlayment over the drip edge creates a continuous barrier against water infiltration. If the underlayment is placed under the drip edge, water can easily flow between the underlayment and the roof deck, leading to leaks, rot, and other forms of water damage. By having the underlayment on top, it acts as a protective shield that directs water safely off the roof.
3. Complying with Building Codes
Many building codes and roofing manufacturer guidelines specify that the underlayment should go over the drip edge flashing at the eaves. This requirement ensures that the roofing system is installed correctly and provides optimal protection against water damage. Complying with these standards not only ensures the durability of your roof but also maintains any warranties provided by roofing material manufacturers.
4. Extending Roof Lifespan
Proper installation of the underlayment over the drip edge flashing helps extend the lifespan of the roof. By effectively managing water flow and preventing water infiltration, this installation method reduces the risk of damage to the roof deck, fascia, and other roofing components. As a result, homeowners can avoid costly repairs and enjoy a longer-lasting roof.
Conclusion
Understanding the importance of drip edge flashings and the correct installation of underlayment at the eaves is crucial for maintaining a durable and watertight roofing system. By ensuring the underlayment goes over the drip edge flashing, homeowners can enhance water shedding, prevent water infiltration, comply with building codes, and extend the lifespan of their roofs.
For professional roof inspections and expert advice on maintaining your roofing system, don't hesitate to contact us. Our team is dedicated to helping you keep your home safe, secure, and in excellent condition.
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