Top 5 Roofing Underlayment Types Every Denver Homeowner Must Know for a Secure Roof

When it comes to roofing, Denver homeowners face unique challenges. The harsh winters, sudden rainstorms, and intense sun exposure can wear down even the toughest roofing materials. One crucial component that often goes overlooked is roofing underlayment. It acts as a protective barrier beneath your roofing material, contributing significantly to the durability and longevity of your roof. This blog post highlights the top five types of roofing underlayment and how you can apply this knowledge to secure your home.

1. Asphalt-Saturated Felt Underlayment

Asphalt-saturated felt, also known as tar paper, has been a staple in the roofing industry for decades. Constructed from recycled paper blended with asphalt, it offers excellent waterproofing properties.

This type of underlayment comes in two standard weights: 15-pound and 30-pound. While the 15-pound is suitable for most residential projects, the 30-pound version provides added durability and is ideal for steep slope roofs.

The application process is straightforward: roll out the underlayment, allow for overlapping seams, and secure it using roofing nails or staples to adhere it firmly to the roof deck.

Close-up of asphalt-saturated felt underlayment ready for installation.

2. Synthetic Underlayment

Synthetic underlayment has gained popularity in recent years due to its lightweight, durable, and moisture-resistant properties. Made from polypropylene or polyethylene, it offers superior performance compared to traditional felt.

One significant advantage of synthetic underlayment is its ability to lie flat, reducing the risk of wrinkles that can trap moisture underneath. Additionally, it is often more resistant to tearing and can handle foot traffic better than felt.

For installation, simply roll it out over the roof deck, using staples or adhesive to secure it. The seams should overlap by at least six inches to ensure a waterproof barrier.

3. Rubberized Asphalt Underlayment

Rubberized asphalt underlayment combines a layer of rubberized asphalt and a backing material, often polyethylene or fiberglass. This type is commonly used in areas prone to ice dams and heavy rainfall, making it an excellent choice for Denver homes.

Its sticky underside allows for easy adhesion to the roof deck, while the upper layer resists water penetration. However, if you plan to use rubberized asphalt, ensure that it is installed in areas that will be protected by the final roofing material.

The installation involves rolling it out and trimming it to fit the surface, ensuring that all edges are sealed for maximum protection against leaks.

Eye-level view of rubberized asphalt underlayment during the installation process.

4. Self-Adhering Underlayment

Self-adhering underlayment is a fantastic option for those looking for ease of installation. It comes with a sticky backing that adheres directly to the roof deck, making it less labor-intensive to apply compared to other types.

This type is especially effective in preventing water intrusion, making it a popular choice in regions with heavy snowfall and intense rain, like Denver. Additionally, self-adhering underlayment is usually made from rubberized asphalt, providing excellent waterproofing capabilities.

To install, simply peel away the release liner and press the underlayment onto your roof. Ensure that overlaps are correctly secured to create a tight seal.

5. Foam Underlayment

Though less common than the other types, foam underlayment presents a viable alternative for areas with very low slopes or flat roofs. Made from materials like polystyrene, it provides excellent thermal insulation and can help reduce energy costs.

Foam underlayment is lightweight and easy to handle, making it a favorite for DIY enthusiasts. For installation, cut the foam sheets to fit your roof's dimensions. Lay them down and attach them using an adhesive designed for roofing applications.

While foam underlayment does not provide the same water barrier as rubberized or synthetic options, its insulating properties make it worth considering, especially for energy-conscious homeowners.

Conclusion

For homeowners in Denver, understanding the different types of roofing underlayment can make a significant difference in the longevity and performance of your roof. The right choice not only protects your roofing investment but can also lead to savings on energy bills and repairs.

By learning the features and benefits of asphalt-saturated felt, synthetic, rubberized asphalt, self-adhering, and foam underlayment, you are well-equipped to decide which type best meets your home’s needs. Consider factors such as your roof's slope, local weather conditions, and budget when making your selection.

In the end, a well-installed roofing underlayment contributes to your home’s overall integrity, giving you peace of mind against the unpredictable Denver weather. Ensure that you consult a professional if in doubt, and always choose quality products for the best results.

Knowledge is power, and with this information, you can approach your next roofing project with confidence!