Daily Archives: April 23, 2025

If you’ve ever asked, “What is the underlayment under the roof?”—you’re not alone. While most homeowners in West Palm Beach, Florida focus on roofing materials like shingles or tiles, there’s a critical component just beneath that often goes unnoticed: the roofing underlayment. This hidden layer plays a starring role in protecting your home from moisture, wind, and the harsh coastal climate typical of South Florida.

With Star Roofing, let’s dive into what roofing underlayment is, the types available, how it works, and why it matters specifically for homes in West Palm Beach.

What Is the Roofing Underlayment?

The underlayment under the roof is a water-resistant or waterproof barrier that sits directly on the roof deck, underneath the outer roofing material (such as asphalt shingles, metal panels, or clay tiles). Its purpose is to serve as a secondary line of defense against elements like wind-driven rain, extreme humidity, and, in the case of West Palm Beach, potential hurricane conditions.

Salient Entities:

• Roof deck
• Asphalt shingles
• Synthetic underlayment
• Roofing felt
• Ice and water shield
• Moisture barrier
• Wind uplift resistance

Why Roofing Underlayment Matters in West Palm Beach, Florida

West Palm Beach homeowners are no strangers to extreme weather. With hot, humid summers and a hurricane season that stretches from June to November, the underlayment becomes crucial. Here’s why:

1. Hurricane Protection

Florida building codes require roofing systems to withstand high winds. The roof underlayment helps maintain a waterproof seal even if the outer roofing material is damaged during a storm. It acts as a critical barrier against water intrusion, a leading cause of structural damage.

2. Humidity and Mold Resistance

High humidity can lead to condensation beneath the roof deck. Quality underlayment prevents this moisture from seeping into your home, reducing the risk of mold and rot—common concerns in coastal climates.

3. Compliance With Florida Building Code

Underlayment requirements in Florida have evolved significantly post-Hurricane Andrew. Today, compliance includes specific installation techniques and materials, such as peel-and-stick waterproof membranes and synthetic underlayment, especially in areas like Palm Beach County.

Types of Roof Underlayment (With Pros and Cons)

Let’s look at the most common types of underlayment used in residential roofing projects across West Palm Beach.

1. Asphalt-Saturated Felt (Roofing Felt)

• Pros: Affordable, time-tested, and easy to install.
• Cons: Less durable, tears easily in high winds, absorbs moisture over time.
• Best for: Budget-conscious homeowners or homes not exposed to frequent storm events.

2. Synthetic Underlayment

• Pros: Lightweight, tear-resistant, water-repellent, and UV-resistant.
• Cons: Slightly more expensive than felt but far more durable.
• Best for: Homes in coastal or high-wind zones like West Palm Beach or Boynton Beach.

3. Rubberized Asphalt (Self-Adhering Membranes)

• Pros: Superior waterproofing, excellent adhesion, self-sealing around nails.
• Cons: Costlier and heavier to install.
• Best for: High-risk areas, especially hurricane-prone neighborhoods in Palm Beach County.

How the Underlayment Works with the Entire Roofing System

Think of the roofing underlayment as your roof’s internal armor. It supports the overall system that includes:

• Rafters and decking
• Drip edge flashing
• Ice and water shield
• Shingles or tiles
• Ventilation systems

When installed correctly, these components work synergistically to manage water runoff, improve thermal efficiency, and extend the lifespan of your roof—an especially smart investment in a location like West Palm Beach, where real estate values are rising and curb appeal is everything.

Local Considerations: Choosing the Right Underlayment in West Palm Beach

Here’s where local knowledge counts. Not all roofing underlayment is created equal, and what works in dry, inland areas may not cut it in a subtropical environment.

Factors to Consider:

• Proximity to the ocean: Salt spray can corrode certain roofing materials; synthetic underlayment often offers better resistance.
• Building code updates: Palm Beach County mandates stricter requirements for homes near the coastline.
• Insurance incentives: Some insurers offer discounts for homes using approved water-resistant underlayment.

Local LSI Keywords:

• South Florida roofing
• Palm Beach County building code
• Roof replacement West Palm Beach
• Hurricane roof prep Florida
• Florida wind mitigation
• Moisture barrier installation

FAQs About Roofing Underlayment

Q: Do I really need underlayment if I have shingles?
A: Yes. Shingles alone can’t seal out water—especially during West Palm Beach’s tropical downpours. Underlayment is essential for waterproofing.

Q: How long does roof underlayment last?
A: Depending on the type, underlayment can last between 20 to 50 years. Synthetic versions offer the longest lifespan, making them ideal for Florida homes.

Q: Is it worth upgrading to peel-and-stick?
A: In high-risk areas like West Palm Beach, absolutely. The cost upfront pays off by preventing costly water damage and may qualify you for wind mitigation credits.

Final Thoughts: Don’t Skip the Layer That Saves Your Roof

So, what is the underlayment under the roof? It’s not just a technicality—it’s your home’s frontline defense against Florida’s fiercest elements. If you’re planning a roof replacement or repair in West Palm Beach, make underlayment a top priority.

Talk to licensed roofing contractors familiar with Florida building codes and Palm Beach County permits. A quality underlayment not only protects your investment but also boosts energy efficiency, resale value, and peace of mind.

Call to Action

Looking to upgrade or inspect your roof underlayment in West Palm Beach, FL? 🌴
Get a free consultation from certified local roofers who specialize in storm-ready roofing systems. Make sure your home is sealed, secure, and future-proof!

If you’re a homeowner in West Palm Beach, Florida, you’ve probably heard your roofing contractor mention “roof underlayment” at some point—perhaps while prepping for a hurricane season upgrade or replacing aged shingles under the relentless South Florida sun. But what does the term roof underlayment refer to, exactly?

With David Spade of Star Roofing, let’s break it down with precision, a bit of local flair, and a whole lot of insight. Because understanding what’s beneath your roof might just be the key to protecting everything under it.

What Is Roof Underlayment?

Roof underlayment is the protective layer installed between your roof deck and the outer roofing material, such as shingles, tile, or metal panels. While it might seem like an invisible component, this layer plays a critical role in waterproofing and weather protection.

In Florida—especially in high-moisture coastal areas like West Palm Beach—this is not a feature you want to skimp on.

Salient Entities & LSI Keywords:

• Roof deck
• Asphalt shingles
• Peel-and-stick underlayment
• Synthetic roofing membrane
• Wind uplift protection
• Secondary water barrier
• Florida Building Code
• Roof inspection
• Hurricane mitigation

Why Is Roof Underlayment Essential in West Palm Beach?

With the city’s tropical rainforest climate, West Palm Beach homeowners face a one-two punch of intense UV radiation and frequent torrential downpours. Not to mention the very real threat of hurricanes during storm season.

Underlayment provides secondary protection against moisture intrusion in case the top roofing material is damaged or lifted due to strong winds. It’s essentially your roof’s backup plan—especially important in areas with high wind uplift zones, like those found across Palm Beach County.

Local Relevance:

Florida’s Statewide Building Code, especially the HVHZ (High-Velocity Hurricane Zone) provisions, requires enhanced roofing systems. West Palm Beach sits near the HVHZ threshold, which means many roofing systems here must include upgraded underlayments like self-adhered membranes or double-layered synthetic products.

Types of Roof Underlayment Used in Florida

Roof underlayment comes in several types, each offering different benefits, especially when tailored for the humid, salt-air-laden environment of coastal Florida.

1. Asphalt-Saturated Felt (Felt Paper)

Once the industry standard, this “old-school” material still has its uses. It’s economical and water-resistant—but less effective in humid climates. In West Palm, it’s often used in budget-conscious repairs or under less demanding conditions.

2. Synthetic Underlayment

Lightweight, durable, and resistant to mold and UV damage, synthetic membranes have become the go-to underlayment for new roof installations across West Palm Beach. Products like Tyvek Roof Protector or GAF Deck-Armor™ are popular for their high tensile strength and ease of installation.

3. Rubberized Asphalt (Peel-and-Stick)

This is the gold standard in coastal environments. With adhesive backing and self-sealing properties, it’s ideal for hurricane-prone zones. Homeowners upgrading to metal roofs or clay tile systems often opt for this option due to its superior waterproofing.

Common Roof Systems in West Palm Beach

The type of underlayment you choose is often dictated by the type of roofing material you install. Here’s how underlayment pairs with the popular roof styles in our area:

• Clay Tile Roofs: Popular for their Mediterranean aesthetic and heat resistance, these require premium underlayment due to their long lifespan and heavier weight.
• Metal Roofs: Increasingly used in hurricane mitigation retrofits. Here, a rubberized peel-and-stick underlayment is often recommended.
• Asphalt Shingles: Still common in residential developments. A synthetic underlayment paired with architectural shingles offers a solid, cost-effective solution.

Roof Underlayment and Florida Code Compliance

Florida doesn’t mess around when it comes to roof integrity. Whether you’re dealing with the Florida Building Code (FBC) or your insurance company, underlayment choices can influence:

• Insurance eligibility and premiums
• Roof replacement permitting
• Wind mitigation credits
• Post-storm inspection approvals

In fact, Florida Statute 553.844 outlines underlayment specifications to improve resistance to water intrusion after shingle loss. Knowing your options isn’t just smart—it’s legally relevant.

How Long Does Roof Underlayment Last?

The lifespan of underlayment depends on the type and installation quality. Here’s a general guideline:

• Asphalt Felt: 10-15 years
• Synthetic: 25-30 years
• Peel-and-Stick: 30-40 years

However, given West Palm Beach’s high humidity, salt exposure, and storm threats, real-world durability might lean toward the lower end—unless properly maintained.

Pro Tip:

Always ask your roofer if they’re using FBC-compliant materials, and whether they’re installing underlayment with drip edge flashing—a small detail with big impact on water shedding.

When Should You Replace Your Roof Underlayment?

Roof underlayment is typically replaced during a full roof replacement—or if there’s storm damage that penetrates below the top layer. Warning signs include:

• Water leaks in the attic after storms
• Visible sagging or moisture in decking
• Shingle loss after strong winds
• Insurance inspection requiring upgrades

For homeowners in West Palm Beach, it’s wise to schedule a roof inspection every 2-3 years, particularly after major weather events. Local companies like Star Roofing and Palm Beach Roof Pros often provide free evaluations post-hurricane.

Final Thoughts: Why It Matters

So, what does the term roof underlayment refer to?

It refers to the invisible armor that guards your home against moisture, wind, and decay. It’s the unsung hero of roofing systems—especially vital in regions like West Palm Beach, Florida, where nature pulls no punches.

Choosing the right underlayment isn’t just a technical decision—it’s a strategic investment in your property’s longevity, value, and resilience.

Call to Action: Don’t Just Cover—Protect!

If your roof is more than 15 years old or you’re unsure about your current underlayment, get a free inspection from a certified local roofer. Ask about synthetic vs. peel-and-stick, and make sure your home meets or exceeds Florida Building Code standards.