What’s Hiding Under Your Tile Roof Matters More Than You Think

Most homeowners focus on the tile itself when choosing a roof—but the real waterproofing comes from what’s underneath.

“What kind of underlayment do you use under tile roofing?”

We get that question often. And at L&L Roofing & Construction, we’re glad you’re asking—because underlayment is one of the most important parts of any tile roofing system.

What Is Underlayment—and Why Does It Matter?

Tile roofing is a water-shedding system, not a waterproof one. That means rain can (and does) get underneath the tiles. The underlayment is what actually keeps your home dry.

Think of it as the hidden barrier between your home and the elements. If the underlayment fails, it doesn’t matter how beautiful your tile looks—your roof can leak, rot, or trap moisture.

The Underlayment We Trust for Georgia’s Climate

At L&L Roofing, we install high-performance synthetic or peel-and-stick underlayment under all tile roofing systems.

Here’s a closer look:

✅ Peel-and-Stick Underlayment (self-adhered)

• Used on low-slope areas or high-wind zones

• Fully adhered to the deck—no nails needed

• Creates a watertight seal around fasteners

• Great for valleys, eaves, and problem-prone areas

✅ High-Performance Synthetic Underlayment

• UV-resistant for extended exposure during installs

• Tear-resistant and walkable for added crew safety

• Lighter than traditional felt but 5x stronger

• Doesn’t wrinkle or absorb moisture like felt does

We do not use standard 15- or 30-pound felt, which can degrade quickly under tile heat and moisture.

Why We Avoid Traditional Roofing Felt

Older tile roofs were often installed with asphalt-saturated felt. That material:

• Breaks down faster in heat

• Absorbs water over time

• Can crack or wrinkle, leading to trapped moisture

In Georgia’s humid climate, that’s a recipe for long-term issues. That’s why we only use modern underlayments rated for tile load, heat exposure, and storm durability.

FAQs: Tile Roof Underlayment

How long does tile roof underlayment last?

Premium synthetic and peel-and-stick underlayments can last 25–30 years or more, depending on conditions. Felt typically lasts only 10–15 years under tile.

Can you replace underlayment without removing the tile?

In some cases, yes. We can lift and reset tile to replace underlayment in sections. This is common in leak repair jobs where the tile is still in good shape.

Is underlayment included in your quote?

Absolutely. Every L&L Roofing tile quote includes high-quality underlayment and full installation, so there are no surprises later.

Protect What You Can’t See

A tile roof is only as strong as the system underneath it. That’s why at L&L Roofing & Construction, we never cut corners on underlayment—because it’s the foundation that keeps your roof dry for decades.

📞 Call us at (770) 874-0372 or schedule a free tile roof estimate anywhere in Gainesville, Cumming, Buford, or the surrounding area. We’ll walk you through the full roofing system—tile and all.