The Right Underlayment for Your Metal Roof: Why It Matters in Florida

What’s the Best Underlayment for a Metal Roof in Florida?

When it comes to installing a metal roof in Florida, choosing the right underlayment is just as important as the panels themselves. Whether it’s for a residential roof replacement or a commercial roof repair, the underlayment is your first line of defense against Florida's heat, humidity, and hurricane-force winds.

Why Underlayment Matters

The underlayment sits between your roof decking and the metal panels. It protects your home or business from:

• Water infiltration during storms

• Condensation and trapped moisture

• Heat transfer that raises energy bills

• Damage from roof leaks or panel failure

Florida-Approved Underlayment Options

For Florida’s harsh climate, the best underlayments include:

• Synthetic Underlayment: Lightweight, tear-resistant, and ideal for high-wind areas. Great for both residential and commercial roofing.

• High-Temperature Ice and Water Shield: Required under metal in many codes, especially around edges, valleys, and penetrations. It self-seals around nails, offering excellent leak protection.

• Self-Adhering Underlayment: Provides a watertight seal and performs well on low-slope roofs or complex rooflines.

According to the Metal Construction Association, the right underlayment also helps your roof handle thermal movement, which is critical with Florida’s wide temperature swings.

What Type of Roofing Projects Need Quality Underlayment?

• Roof Replacement: If you’re swapping an old shingle roof for a new standing seam metal system, upgraded underlayment is non-negotiable.

• Roof Repair: For leak-prone areas or storm-damaged sections, the right underlayment can prevent further interior damage.

• New Construction: Whether you're building a custom home or a commercial facility, underlayment sets the foundation for long-term performance.

FAQs

What underlayment is best under a metal roof in Florida?
Synthetic underlayment combined with high-temp peel-and-stick membrane is ideal for Florida’s heat, rain, and storm risk.

Is underlayment required for metal roofs?
Yes. Florida Building Code requires underlayment for all roof coverings, especially in wind-borne debris regions.

Can I use felt paper under a metal roof?
Technically yes, but it’s not ideal for Florida. Felt breaks down faster and can wrinkle, trapping moisture. Stick with synthetic or self-adhering products.

Trust Roof Nuts FL for Expert Roof Work

Whether you’re planning a residential roof replacement in Jacksonville or need commercial roof repair in Tampa, Roof Nuts FL has you covered.

Call Jay Bradley and Blake Williamson at 904-694-3426 to schedule your inspection today.