Roofing felt, also known as tar paper or underlayment, plays a crucial role in protecting roofs from moisture and providing an additional layer of insulation. Choosing the right nails for securing roofing felt is vital to ensure the integrity of the roof structure. In this technical guide, we will provide clear and concise information about the types of nails used for roofing felt, their features, and best practices for installation.
- Types of Nails for Roofing Felt
When it comes to fastening roofing felt, there are two primary types of nails commonly used:
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Felt Nails: Felt nails, also known as roofing nails, are designed specifically for attaching roofing felt. These nails are typically short, with a large, flat head to securely hold the felt in place. Felt nails are available in various materials, including galvanized steel and aluminum, which provide resistance to corrosion. Their short length prevents them from penetrating the roof sheathing, reducing the risk of leaks.
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Plastic Cap Nails: Plastic cap nails feature a small plastic cap on the nail head. These nails are designed for applications like roofing felt, where the cap helps to prevent the felt from tearing or ripping due to wind, weather, or foot traffic. The cap also enhances the holding power of the nail.
- Features to Consider
When selecting nails for roofing felt, several key features should be considered:
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Material: Choose nails made from corrosion-resistant materials such as galvanized steel or aluminum to ensure the longevity of the installation. Galvanized nails are preferred for their added protection against rust and corrosion in outdoor applications.
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Length: The length of the nail is critical. It should be long enough to penetrate the roofing felt and slightly embed into the sheathing beneath. A typical length for roofing felt nails is around 1 inch.
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Head Type: The flat head of felt nails is ideal for securing roofing felt without tearing it. The plastic cap on plastic cap nails provides extra protection to the felt and helps distribute the holding force evenly.
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Gauge: The gauge refers to the thickness or diameter of the nail. For roofing felt, a standard 11-gauge or 12-gauge nail is typically suitable.
- Installation Best Practices
Proper installation of roofing felt nails is essential for the overall performance of the roofing system. Here are some best practices to follow:
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Spacing: Space the nails evenly, typically around 6 to 8 inches apart along the edges and 12 to 16 inches apart in the field of the roofing felt. Be sure to follow the manufacturer’s recommendations.
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Overlapping: Overlap the edges of the roofing felt sheets by at least 2 inches to create a secure, watertight seal.
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Avoid Overdriving: Be cautious not to overdrive the nails, as this can damage the roofing felt. The nails should be flush with the felt, but not excessively embedded.
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Check Local Codes: It’s essential to consult local building codes and regulations, as they may specify particular requirements for roofing felt installation.
Conclusion
Selecting the right nails for roofing felt is a critical part of ensuring the longevity and effectiveness of a roofing system. Felt nails and plastic cap nails are the primary choices, each offering unique features to enhance the performance of the installation. By considering factors like material, length, head type, and gauge, and adhering to best practices during installation, you can be confident that your roofing felt will provide reliable protection for years to come.