The use of clout nails for roofing felt is a common practice in many American construction and renovation projects. This article explains what clout nails are, how they interact with roofing felt, and best practices for installation, safety, and maintenance. Readers will learn how to choose the right nails, apply felt correctly, and explore alternatives to ensure a durable, weather-tight roof underlayment.
What Are Clout Nails And Roofing Felt
Clout nails are broad-headed nails designed to provide a wide, secure fastening surface. They are typically used in wood applications where a strong hold is needed without splitting the substrate. Roofing felt, a sheet underlayment placed beneath shingles, serves as a barrier against moisture, wind-driven rain, and minor ventilation gaps. When installed properly, felt helps prevent leaks and aids in weatherproofing during construction and repairs. The combination of clout nails and roofing felt is common on repairs, sheds, porches, and some residential roof sections where rapid, economical installation is valued.
Choosing Clout Nails For Roofing Felt
Key considerations include nail length, material, head size, and corrosion resistance. In general, choose nails that are long enough to penetrate through the felt and securely anchor into the roof deck or sheathing without protruding excessively. Stainless steel or galvanized nails resist rust, which is crucial in roof work exposed to rain and humidity. For wooden substrates, ensure the shank is thick enough to resist pull-out from wind uplift. Avoid nails with sharp points that may tear the felt during driving. Quality and compatibility with the roof deck and climate are critical for long-term performance.
Common guidance suggests clout nails in the 1- to 1-1/2-inch range for typical felt applications on standard wooden decks or sheathing. For thicker or reinforced decking, longer nails may be required. Always follow the roofing felt manufacturer’s fastener recommendations to maintain warranty coverage and ensure proper wind uplift resistance.
Installing Roofing Felt With Clout Nails
Preparation is essential. Clean the surface, remove debris, and align the felt so seams ramp over the ridge with appropriate overlaps—usually about 19 inches for certain felt weights, though this can vary by product. Use a hammer with a steady swing to avoid denting the nail head or tearing the felt. Drive nails at consistent intervals along the seams and edges to prevent shifting during wind or rain. Do not overdrive; the nail head should sit flush with the surface without compressing or buckling the felt.
To maximize weather resistance, stagger seams and secure the top edge of each sheet with nails placed at the prescribed spacing. For exposed roof areas, consider additional adhesive or seam tape along critical joints as recommended by the felt manufacturer. Maintain a clean work area to prevent grit from dulling nails or causing misalignment. Properly stored nails resist corrosion and maintain ease of driving across projects.
Common Mistakes And How To Avoid Them
- Overdriving nails: This can tear the felt and create weak spots. Keep a consistent depth that sets the head flush but does not compress the material.
- Using inappropriate nails: Substandard metals or incorrect lengths reduce holding power and promote corrosion. Always match nail type to climate and substrate.
- Skipping overlaps or improper alignment: Misaligned seams create leaks. Ensure uniform overlaps and straight rows.
- Neglecting edge fasteners: Loose edges invite wind uplift. Secure all edges with nails at the recommended spacing.
Alternatives To Clout Nails
For some projects, staples or roofing-specific fasteners can be preferable. Staples offer quick installation but may not seal as securely, especially on exposed edges. Roofing nails with larger heads and specialized corrosion resistance provide robust performance under wind uplift. In high-wind regions, adhesive on seams or self-adhesive roofing underlayments can supplement nailed fasteners. Always compare the benefits and limitations of each method against local building codes and manufacturer specifications.
Maintenance, Inspection, And Longevity
After installation, periodic inspection matters. Look for loose nails, torn felt, or lifted edges after storms. Replace any damaged nails and reseal seams as needed. In the event of moisture intrusion, address underlying roof conditions promptly to prevent widespread damage. Clean gutters and ensure proper drainage to reduce water exposure near fasteners. With proper installation and maintenance, clout nails used with roofing felt can provide an effective underlayment solution that supports the roof system’s longevity.
Practical Quick Reference
| Aspect | Clout Nails | Roofing Felt |
|---|---|---|
| Typical Length | 1 in to 1-1/2 in common; longer for thicker decks | Depends on weight; overlaps and seams critical |
| Material | Galvanized steel or stainless steel | Bitumen-saturated or self-adhering synthetic underlayment |
| Head Type | Wide, flat head | Designed for seams and overlay durability |
| Best Practices | Flush head, proper spacing, avoid tearing | Accurate overlaps, secure seams, weatherproofing |
Safety Considerations
Roof work requires fall protection, stable ladders, and proper PPE. When driving nails on roofs, ensure footing on secure, dry surfaces. Keep tools in good condition and store nails securely to prevent injuries. If unsure about local codes or best practices, consult a licensed professional or building inspector.