When it comes to roll roofing, the concealed nail method is a popular technique used to ensure a secure and aesthetically pleasing installation. In this straightforward article, we’ll dive into the technical aspects of the concealed nail method for roll roofing, explaining what it is, its applications, and how to use it effectively.

1. Concealed Nail Method – What is it?

The concealed nail method is a roofing installation technique that, as the name suggests, hides the nails beneath the overlapping layers of roll roofing material. This approach creates a sleek, clean appearance while ensuring a watertight seal.

2. Materials Needed:

Before diving into the technical details, let’s briefly touch on the materials you’ll need for the concealed nail method:

• Roll Roofing Material: Common materials include asphalt or bitumen roll roofing.
• Roofing Nails: Use galvanized roofing nails, typically around 1¼ to 1½ inches in length.
• A Roofing Hammer or Nail Gun: A roofing hammer with a magnetic head or a nail gun designed for roofing applications is ideal.

3. Steps for Concealed Nail Method:

Here’s a simplified guide on how to apply the concealed nail method to your roll roofing project:

a. Prepare the Surface: Ensure the roof deck is clean, smooth, and dry before starting.

b. Overlap the Rolls: Position the first roll of roofing material, ensuring it overhangs the roof’s edge. Subsequent rolls should overlap the previous one by around 3 to 6 inches.

c. Nail Placement: Place nails in the top edge of the overlapping roll, just beneath the upper edge of the material.

d. Cover the Nails: The next roll should completely cover the nails from the previous roll. Ensure the nails are not visible when the roll is in place.

e. Secure the Overlapping Roll: Use a roofing hammer or nail gun to secure the overlapping roll in place. Drive the nails flush with the roofing material but avoid overdriving, as this may damage the material.

f. Repeat the Process: Continue overlapping and securing rolls until you cover the entire roof surface.

4. Benefits of Concealed Nail Method:

• Enhanced Aesthetics: The concealed nail method provides a sleek, uniform appearance with no visible nails.
• Improved Water Resistance: Overlapping the rolls and concealing the nails helps prevent water infiltration.
• Durability: When properly executed, this method creates a robust and long-lasting roofing system.

5. Tips and Considerations:

• Always follow the manufacturer’s guidelines for the specific roll roofing material you are using.
• Ensure proper nail placement and secure each roll effectively to maintain the roofing system’s integrity.

Conclusion:

The concealed nail method is a practical and effective technique for installing roll roofing while achieving a clean and watertight finish. Whether you’re a seasoned roofer or a DIY enthusiast, mastering this method can lead to a successful roll roofing project that not only performs well but also looks great. Remember to follow the specific guidelines for your chosen roll roofing material and take your time to secure each roll properly for the best results.