Flat roofs are a common architectural feature, and ensuring they remain leak-free is essential. One aspect of maintaining a watertight flat roof is understanding how to cover the nails that secure roofing materials. In this article, we’ll discuss the methods and materials used for this crucial task.

Why Cover Nails on a Flat Roof?

Nails are used to secure roofing materials like membrane or rolled roofing to the roof deck. However, the heads of these nails create holes in the roofing material, which can potentially allow water to penetrate the roof deck. To prevent leaks and ensure the longevity of the flat roof, covering these nails is necessary.

Common Methods for Covering Nails

1. Roofing Cement or Sealant:

   Roofing cement or sealant is a widely-used method for covering nails on a flat roof. It’s applied directly over the nail heads to create a waterproof seal. Here’s how to do it:
2. Clean the area around the nail head to ensure proper adhesion.
3. Apply a generous amount of roofing cement or sealant over the nail head, ensuring it covers the entire head and the surrounding area.

4. Covering with Flashing:

   Flashing is a thin, impervious material (often metal) used to cover vulnerable areas on a flat roof, including nail heads. The process involves:
5. Cut a small piece of flashing material.
6. Place it over the nail head and secure it using roofing cement, screws, or nails.

7. Rubber or Plastic Caps:

   Specialized rubber or plastic caps can be placed over nail heads. These caps create a watertight seal and are easy to install.
8. Simply push the cap over the nail head until it covers it completely.

Key Considerations

• Material Compatibility: Ensure that the material used to cover the nails is compatible with the roofing material. Some roofing materials may react with certain sealants or flashing materials.

• Maintenance: Regularly inspect the covered nails to ensure the covering material remains in good condition. If you notice any damage or deterioration, it should be promptly repaired or replaced.

Conclusion

Covering nails on a flat roof is a vital step in maintaining its integrity and preventing leaks. Roofing cement, flashing, and specialized caps are effective methods for achieving this. By following the appropriate procedure and considering material compatibility, you can ensure your flat roof remains waterproof and free from potential issues. Regular maintenance and inspections further contribute to the long-term durability of your flat roof.