The Hidden Layer That Protects It All
When it comes to roofing, most people focus on the panels — the material, the color, and the finish. But beneath every durable, long-lasting roof is an unsung hero: the underlayment.
This protective layer sits between the roof deck and the metal panels, providing an essential barrier against moisture, heat, and wind-driven rain. Choosing the right one can mean the difference between a roof that lasts decades and one that fails prematurely.
Why Underlayment Is So Important
A metal roof is designed to withstand Florida’s toughest elements — but underlayment adds that extra line of defense.
Here’s why it matters:
💧 Moisture Protection – Prevents condensation and rainwater from seeping through to the roof deck.
🌬️ Wind Resistance – Adds stability under strong wind uplift, critical for hurricane zones.
☀️ Thermal Regulation – Reduces heat transfer and improves energy efficiency, keeping interiors cooler.
🔥 Fire Resistance – Many synthetic and self-adhered underlayments are Class A fire-rated, adding another safety layer.
Types of Underlayment for Metal Roofs
Synthetic Underlayment
Lightweight, tear-resistant, and ideal for Florida’s humidity.
Provides superior traction and durability during installation.
Peel-and-Stick (Self-Adhered)
Offers the best waterproofing performance.
Recommended for low-slope roofs or areas with high wind and rain exposure.
Felt (Asphalt-Saturated Paper)
A traditional option that’s still used for specific applications but less durable under prolonged heat and moisture.
Florida Conditions Demand the Best
In Florida’s tropical climate, high-performance synthetic or peel-and-stick underlayments are the top choices.
They can withstand high humidity, resist UV damage, and meet Miami-Dade and HVHZ (High Velocity Hurricane Zone) approvals for maximum protection.
At ALSTEEL Metal Roof Manufacturing, we work with contractors to ensure every project uses the right materials — from panels to trims to the underlayment that ties it all together.
The Foundation of a Strong Roof
Your roof’s performance starts long before the panels are installed. By selecting the right underlayment, you’re not just protecting your roof — you’re protecting the structure, energy efficiency, and longevity of the entire building.
📍 17121 Cam Court Suite 5, Fort Myers, FL 33967
📞 (239) 288-4215 / (239) 849-8757 / (239) 406-9040
📩 sales@alsteelroofing.com
