Blog Post

When it comes to metal roof installation, selecting the best underlayment for your project is crucial. The right underlayment not only provides an extra layer of protection but also enhances the longevity and performance of your metal roofing system. Let’s dive into the different types of roofing underlayments for metal roofs, what goes under metal roofing, and why it matters.

What is Roofing Underlayment?

Roof underlayment is a barrier material installed directly onto the roof deck before the metal roof layers are added. It serves as a protective shield between the roof and external elements like water, ice, and wind. Understanding the key roofing underlayment types can help you choose the best option for your metal roofing installation.

Types of Underlayment for Metal Roofing

There are three primary roof underlayment types that are commonly used in metal roof installations:

1. Asphalt-Saturated Felt (Roofing Paper): This is the traditional and most commonly used underlayment material. Often referred to as roofing paper, asphalt-saturated felt is affordable and provides a decent level of protection. However, it may not be the best option for all climates or roofing systems, particularly in areas prone to extreme weather conditions.
2. Synthetic Underlayment Synthetic underlayment for metal roofs has gained popularity due to its superior durability, moisture resistance, and ease of installation. This material is lightweight, tear-resistant, and highly recommended for long-term performance. If you’re looking for the best underlayment for metal roofs, synthetic options are often preferred by roofing professionals.
3. Self-Adhering Membranes Designed for extra waterproofing protection, self-adhering membranes are excellent for areas that experience heavy rain or snow. These materials offer excellent sealing capabilities and can prevent leaks around roof penetrations.

Why Using the Best Underlayment is Important for Metal Roofs

The underlayment plays a critical role in the overall performance of your roof. It acts as a secondary defense against moisture penetration, especially in cases where the metal roofing materials might shift or become damaged. Without proper underlayment, the roof decking can be exposed to water damage, reducing the lifespan of the entire roof system.

The decision of which underlayment to use depends on several factors, including climate, roof pitch, and the type of metal roofing materials being installed, such as sheet metal roofing or silver metal roof systems. Working with a qualified roofing installation expert like BMR can help ensure that you select the ideal roof underlayment for your specific metal roof layers and environment.

Metal Roof Underlayment Installation Tips

Installing the right underlayment is as important as choosing the right material. A few things to keep in mind during the installation process include:

• Proper overlap: Make sure each layer of underlayment is properly overlapped to prevent moisture infiltration.
• Sealing penetrations: Use special tapes or sealants to ensure a watertight seal around roof penetrations like vents and chimneys.
• Compatible fasteners: Always use fasteners that are compatible with both the underlayment and the metal roofing materials.

Selecting the right underlayment for your metal roofing project is essential for long-term performance and protection. Whether you opt for traditional roofing paper or modern synthetic underlayment, making an informed choice can save you from costly repairs in the future. For the best results, schedule a consultation today. We’ll work hard to choose quality roof underlayment materials tailored to your specific roofing system.