A crucial aspect of installing rolled roofing is understanding the correct nailing pattern. In this technical guide, we’ll provide clear and concise information on the technical details and the recommended nailing pattern for rolled roofing, ensuring that both technical experts and non-technical individuals can grasp this essential information.
Understanding Rolled Roofing
Rolled roofing, also known as roll roofing, is a cost-effective roofing material used primarily for low-slope or flat roofs. It is made of asphalt-impregnated felt or fiberglass, and its installation requires a specific nailing pattern to ensure proper adhesion and weather resistance.
Technical Details of Rolled Roofing Nails
Before we dive into the nailing pattern, let’s understand the key technical details of the nails used for rolled roofing:
1. Nail Type:
For rolled roofing, you should use roofing nails specifically designed for this purpose. Roofing nails are available with either a smooth or a twisted shank. The twisted or barbed shank provides better holding power and is generally recommended for rolled roofing applications.
2. Nail Length:
The length of the nails used for rolled roofing typically ranges from 1 to 1.25 inches. The choice of length depends on the thickness of the roofing material and the roof deck. The nails should be long enough to penetrate through the roofing material and securely into the roof deck.
3. Nail Head:
Roofing nails have a wide, flat head. This head design ensures that the nails securely hold down the roofing material without tearing through it.
The Recommended Nailing Pattern
The correct nailing pattern is crucial to prevent wind uplift and water infiltration. For rolled roofing, the nailing pattern is relatively simple and follows these guidelines:
1. Start at the Low Edge:
Begin by unrolling the roofing material at the low edge of the roof, ensuring it overhangs the eave by approximately 2 inches.
2. Spacing:
Nail the roofing material approximately 6 inches from the edge and 12 inches apart along the length of the material. This provides adequate spacing for securing the rolled roofing effectively.
3. Overlapping Seams:
If you have multiple rolls of roofing material and need to overlap them, ensure the overlap is at least 6 inches. Nail through the overlap, placing nails 3 inches from the edge to secure it.
4. Edge Nailing:
Along the sides of the rolled roofing, nail the edges approximately 6 inches from the edge and 12 inches apart, similar to the nailing pattern along the length.
5. End Nailing:
Finally, at the high edge or ridge of the roof, nail the end of the rolled roofing approximately 6 inches from the edge and 12 inches apart, similar to the rest of the nailing pattern.
Conclusion
Properly understanding and implementing the correct nailing pattern for rolled roofing is fundamental for a successful installation. By adhering to the recommended nailing pattern and using the right type and size of roofing nails, you ensure that your rolled roofing is securely fastened and can withstand the elements. Whether you’re a professional roofer or a DIY enthusiast, following these guidelines will help you achieve a durable and weather-resistant rolled roofing installation.