When protecting your home, the roof is your first line of defense—shielding you from the elements year-round. But, did you know that a crucial layer beneath your roof covering plays an important role in its performance and longevity?
That layer is called roof underlayment.
If you’re a homeowner here in Arizona, understanding what roof underlayment is—and why it’s so important—is key to maintaining a durable and efficient roof for your home.
Here is your guide on everything you need to know about roof underlayment.
What Is Roof Underlayment?
Roof underlayment is a water-resistant or waterproof layer installed between your roof’s decking (the wooden structure) and the outer roof covering (like tiles or shingles).
Its primary function is to provide an extra barrier of protection against moisture, wind, and other elements that could seep through the roof’s primary materials.
Think of it as an added insurance policy for your home’s most essential protective layer. Without proper underlayment, your roof may not perform optimally, especially in challenging climates like Arizona, where extreme heat and sudden downpours are common.
How Does Underlayment Protect Your Roof?
- Moisture Barrier: It prevents rainwater or condensation from trickling into your home, especially if the roof covering is damaged.
- Wind Resistance: Strong Arizona winds can lift roof coverings or tiles, but the underlayment ensures nothing enters your home.
- Extra Thermal Protection: Quality underlayment offers some protection against the state’s hot temperatures, safeguarding your roofing materials and decking over time.
Types of Roof Underlayment
Not all roof underlayments are created equal. Here are the most common types used in the industry today:
1. Asphalt-Saturated Underlayment
Traditional and reliable, asphalt-saturated underlayment is made from fiberglass matting soaked in asphalt.
It’s highly water-resistant and offers decent protection, making it a popular choice for many homeowners.
2. Synthetic Underlayment
Increasingly favored in new roofing projects, synthetic underlayment is crafted from durable polymers.
It’s lightweight yet incredibly strong, providing superior water resistance underlayment. Durability compared to asphalt-saturated varieties.
3. Rubberized Asphalt Underlayment
Priced at the premium end, rubberized asphalt underlayment is fully waterproof, thanks to its rubberized properties. It’s ideal for homes located in areas prone to heavy rain or leaks.
When choosing an underlayment for your roof, factors like budget, roof type, and local climate will play a role.
Why Is Roof Underlayment Crucial for Arizona Homes?
Arizona’s climate is tough on roofs. Blazing summer heat, monsoon rainstorms, and dust storms can all take their toll. That’s where proper roof underlayment becomes even more critical.
Specific Arizona Considerations:
- Extreme Heat: Roof tiles and shingles in Arizona expand and contract due to high temperatures. Without a high-quality underlayment, this could lead to cracks, leaks, or material failure.
- Monsoon Season: Arizona experiences sudden, torrential downpours during monsoon season. Roof underlayment serves as an essential waterproof layer to stop water infiltration.
- Desert Dust: Fine particles of desert dust can work their way under roof tiles. Underlayment acts as a protective shield, preventing dirt from affecting the roof deck.
Signs of Roof Underlayment Damage
Worried your underlayment might need attention?
Here are some common warning signs homeowners should look out for:
- Leaks or Water Damage: Water stains on ceilings or walls often indicate underlayment failure.
- Lifted Roof Tiles or Shingles: Shingles or tiles out of place could expose the underlayment, making it vulnerable to damage.
- Visible Tears or Cracks (in the underlayment): During roof inspections, visible wear, or holes in the underlayment signal it’s time for a replacement.
- Poor Energy Efficiency: If your home’s energy bills spike, it may be due to poor roof insulation caused by damaged underlayment.
If you notice any of these signs, you should contact a roofing contractor to assess the situation. They’ll be able to determine if your underlayment needs repair or replacement and recommend the best course of action.
Replacing and Installing Roof Underlayment
When roof underlayment has reached the end of its lifespan (often 10–20 years, depending on the material), replacement is essential. Installing or replacing underlayment requires professional expertise to ensure proper sealing and alignment.
It’s generally not a DIY situation for more homeowners. With that being said, here are the general steps and what to expect for replacing the roof underlayment.
Steps to Replace Roof Underlayment:
- Inspection: A thorough inspection to identify which areas need attention.
- Removal: Carefully removing the roof covering to access the underlayment.
- Installation: Laying down the new water-resistant or waterproof underlayment.
- Re-sealing: Reinstalling roof tiles or shingles to leave the roof in perfect condition.
Here at Kore Roofing, we rely on high-quality materials and a proven process to ensure your roof’s integrity. Whether you’re replacing underlayment or installing it during a new build, our in-house team of experts uses industry-leading products, like synthetic underlayment ideal for Arizona homes.
Secure Your Home’s Future with Quality Underlayment
In conclusion, investing in quality roof underlayment is a critical step in safeguarding your home against the harsh elements characteristic of Arizona’s climate.
From providing an essential moisture barrier during monsoon seasons to offering extra thermal protection against relentless heat, the right underlayment enhances the durability and efficiency of your roof.
Now that you know the importance of roof underlayment, it’s time to ensure your own roof is in great shape. If you suspect your underlayment is damaged—or you want to ensure your roof is ready for Arizona’s extreme climate— Kore Roofing is here to help.
We offer:
- A free roofing quote to evaluate your roof and underlayment.
- High-quality underlayment options designed for Arizona weather.
- Trusted workmanship, backed by a 10-year warranty.
Protect your home, family, and peace of mind with Kore Roofing. Contact us today for your free roof inspection and quote.
