Roof felt paper, also known as roofing underlayment, is a critical component of any roofing system. It provides an additional layer of protection against water infiltration and plays a vital role in the overall longevity and performance of your roof. However, when securing roof felt paper with nails, it’s essential to address nail holes to maintain the water-resistant properties. In this guide, we’ll explore the importance of sealing nail holes in roof felt paper with tar sealer.

The Role of Roof Felt Paper

Before diving into nail holes and tar sealing, let’s briefly understand the role of roof felt paper in roofing systems. Roof felt paper is a thin, flexible material that is typically installed directly on the roof deck or sheathing before the shingles or other roofing materials. It serves several crucial functions:

• Waterproofing: Roof felt paper provides an additional layer of protection against water infiltration. Even if shingles or other exterior materials are damaged, the felt paper acts as a backup barrier.

• Moisture Control: It helps manage moisture that can accumulate in the roof structure, preventing rot and mold.

• Protection Against Resins and Sap: In some cases, it can protect the roof from resins and sap that may be present in certain types of wood sheathing.

• Temporary Weather Barrier: During the roofing installation process, it acts as a temporary weather barrier to protect the structure from the elements.

The Challenge: Nail Holes

Nail holes in roof felt paper are a common issue, and they can compromise the material’s water-resistant properties. These holes occur when roofing nails are used to secure the felt paper to the roof deck. If left unsealed, they provide potential entry points for water, which can lead to leaks and damage to the underlying structure.

Solution: Tar Sealer

To address nail holes in roof felt paper, roofing professionals often use tar sealer, also known as roof cement or plastic roofing cement. Here’s how to apply it effectively:

1. Clean the Surface: Before applying tar sealer, ensure that the surface is clean and free of dirt, dust, and debris. This will help the sealer adhere properly.

2. Apply the Sealer: Using a putty knife or a caulk gun, carefully apply the tar sealer over the nail holes and any other areas where roofing nails are present. Be sure to cover the holes completely to create a water-tight seal.

3. Smooth and Feather: To ensure a proper seal and a neat appearance, smooth and feather the tar sealer around the nail holes. This will help it blend with the surrounding roofing felt.

4. Check for Coverage: Once you’ve applied the sealer, double-check to ensure that all nail holes and vulnerable areas are covered. Pay special attention to seams and overlaps.

Benefits of Tar Sealer

Applying tar sealer to nail holes offers several key benefits:

• Water Resistance: It ensures that water cannot penetrate through the holes, preserving the integrity of the roof felt paper and preventing leaks.

• Durability: Tar sealer is designed to withstand the elements and maintain its sealing properties for an extended period.

• Cost-Effective: It’s an affordable and efficient solution for addressing nail holes.

• Versatility: Tar sealer can be used in various roofing applications, making it a valuable tool for professionals.

In conclusion, addressing nail holes in roof felt paper with tar sealer is a simple yet crucial step in maintaining a watertight roofing system. By understanding the importance of this process and following the steps outlined above, you can help ensure the long-term integrity and performance of your roof. Whether you’re a seasoned roofing professional or a homeowner with a DIY spirit, this practice is an essential part of roofing maintenance and repair.