When it comes to new roofing projects, many homeowners focus solely on the visible components, such as shingles or tiles. However, one critical element that often gets overlooked is roofing underlayment. This protective layer plays a vital role in the overall durability and effectiveness of your roof. But what exactly is underlayment, and why is it so important?

In this blog, we’ll explore the role of underlayment in new roofing projects and why it’s an essential component to protect your home from the elements.

What Is Roofing Underlayment?

Roofing underlayment is a water-resistant or waterproof barrier that is installed directly onto your roof’s decking, underneath the outer roofing material (such as shingles). It serves as a protective layer that shields your home from water infiltration, extreme temperatures, and other weather-related damage.

There are two primary types of underlayment used in roofing projects:

• Felt Paper Underlayment: A traditional option made from asphalt-saturated paper or fiberglass.
• Synthetic Underlayment: A more modern material that is lighter, more durable, and highly resistant to tearing and moisture.

Why Is Roofing Underlayment Important?

1. Waterproofing Protection
   One of the primary functions of underlayment is to provide an extra layer of protection against water penetration. Even with high-quality shingles or tiles, water can still find its way through seams or cracks, especially during heavy rain or wind-driven storms. Underlayment acts as a waterproof barrier that prevents water from reaching the roof deck and causing long-term damage.

2. Protection Against Ice Dams
   In colder climates, ice dams can form along the edges of the roof, causing water to back up under the shingles. Underlayment helps prevent this water from seeping into your home, protecting against leaks and potential damage to the structure.

3. Adds Insulation and Fire Resistance
   While not its primary function, underlayment can contribute to the insulation of your roof, helping to regulate temperatures inside your home. Additionally, some types of underlayment have fire-resistant properties, offering an extra layer of safety in case of a fire.

4. Backup Protection for Shingles
   Shingles are your roof’s first line of defense, but they can get damaged or lifted due to harsh weather. Underlayment provides a second layer of defense that continues to protect your home if the shingles are compromised.

5. Increases Roof Longevity
   By providing an additional barrier against moisture, debris, and other environmental factors, roofing underlayment contributes to the long-term durability of your roof. This means fewer repairs and replacements down the road.

Choosing the Right Underlayment for Your Roof

The choice between felt paper and synthetic underlayment will depend on your specific roofing needs, budget, and local climate. Synthetic underlayment is typically the preferred choice due to its strength, durability, and ability to withstand extreme temperatures, but both options offer reliable protection when properly installed.