The Importance of Roofing Underlayment in Florida’s Climate

Florida’s unique weather conditions, characterized by frequent hurricanes and heavy rainfalls, necessitate robust roofing systems. A critical component of these systems is the roofing underlayment. This layer, positioned beneath the main roofing material, plays a pivotal role in protecting homes from water intrusion. The state’s recent experiences with devastating hurricanes have led to significant updates in roofing underlayment requirements, ensuring enhanced protection for residential and commercial properties.

Enhanced Underlayment Requirements for Optimal Protection

Upgraded Material Standards

The Florida Building Code, 7th Edition, has raised the bar for underlayment materials. Now, underlayments must either be #30 felt or meet the stringent standards of ASTM D 226 Type II or ASTM D4869 Types III or IV. This upgrade is a direct response to the need for materials that can withstand severe weather conditions, particularly wind-driven rain.

Installation and Layering Techniques

Proper installation is as crucial as the material quality. The code now requires that #30 underlayment be used to seal all self-adhering tapes over roof deck joints. In cases of redecking, existing self-adhering tapes can be left in place, but a new layer of #30 or equivalent underlayment must be added. This ensures a continuous, unbroken barrier against water ingress.

Sealed Roof Deck Options

The new code outlines three methods to achieve a sealed roof deck, a crucial defense against hurricane damage:


  • Single Layer of Peel-and-Stick Underlayment: This involves applying a self-adhering rubberized asphalt underlayment across the entire roof deck.
  • Combination of Screwed Underlayment and Adhesive Strips: First, apply¬†

self-adhering rubberized asphalt strips to the deck joints, followed by a layer of #30 or equivalent felt or synthetic underlayment over the entire roof deck.


  • Dual Layers of Felt or Synthetic Underlayment: For those opting out of self-adhesive layers, installing two layers of felt or synthetic underlayment over the entire deck is a viable alternative.

The Role of Professional Roofing Services

Expertise in Compliance and Quality

Navigating the complexities of the updated Florida roofing codes requires professional expertise. FIXD Roofing LLC, a leading roofing company in Port St Lucie, specializes in ensuring that your roofing project not only meets but exceeds these new standards. Our team’s deep understanding of the local climate and building codes makes us an ideal partner for your roofing needs.

Comprehensive Roofing Solutions

At FIXD Roofing LLC, we offer a range of services, from roof repair in Port St Lucie FL to complete roof replacements. Our approach is tailored to each project, ensuring that every roof we work on is robust, compliant, and ready to withstand Florida’s challenging weather conditions. We pride ourselves on using the latest technology and materials, aligning with the state’s commitment to safer and more durable roofing systems.


The updated Florida roofing underlayment requirements are a testament to the state’s commitment to building safety and resilience. As homeowners and building managers navigate these changes, partnering with experienced roofing contractors like FIXD Roofing LLC becomes essential. With our expertise in the latest roofing technologies and a deep understanding of local building codes, we are well-equipped to provide roofing solutions that are not just compliant but also offer long-term protection and peace of mind.