Navigating Florida Building Codes: The Importance of Double-Layered Underlayment with Brehm Roofing

Florida’s unique climate poses a myriad of challenges to homeowners, particularly when it comes to roofing. From torrential rain and hurricanes to intense heat and humidity, the weather conditions in the Sunshine State demand robust roofing solutions. At Brehm Roofing in Gainesville, Florida, we understand the critical role that proper roofing installation plays in protecting your home and ensuring its longevity. One of the key components of a durable roof is the underlayment, and Florida Building Codes mandate the installation of two layers of underlayment for added protection. In this blog, we delve into the why’s and how’s of this requirement, helping you make informed decisions for your roofing needs.

Understanding Underlayment

Before diving into the specifics of the building codes, let’s first understand what underlayment is. Underlayment is a water-resistant or waterproof barrier material installed directly onto your roof deck. It provides an additional layer of protection from severe weather conditions, acting as a shield between your roof deck and the shingles. This is crucial in preventing water damage and ensuring the structural integrity of your roof.

The Florida Building Code Requirement

The Florida Building Code (FBC) is stringent when it comes to roofing standards, and for good reason. Given the state’s propensity for hurricanes and heavy rain, the FBC has set forth specific requirements to ensure that roofs can withstand these extreme conditions. One such requirement is the installation of two layers of underlayment on your roof replacement (when installing synthetic underlayment).

Why Two Layers?

  1. Enhanced Water Resistance: The primary function of underlayment is to provide a waterproof barrier. By installing two layers, you significantly enhance the water resistance of your roof, ensuring that even if the outer layer gets damaged, the second layer provides an additional level of protection, preventing water from seeping into your home.
  2. Improved Durability: The intense UV rays and high temperatures in Florida can cause single-layered underlayment to deteriorate faster. The second layer helps in prolonging the life of your underlayment, and by extension, your roof.
  3. Increased Wind Resistance: Florida is no stranger to strong winds and hurricanes. A double-layered underlayment provides better adhesion and stability, ensuring that your roof can withstand high winds and reducing the risk of shingles being blown off.
  4. Insurance Benefits: Some insurance companies offer reduced premiums for homes that adhere to higher roofing standards. By following the FBC requirements and installing two layers of underlayment, you may qualify for these benefits, saving you money in the long run.

Choosing the Right Underlayment with Brehm Roofing

At Brehm Roofing, we pride ourselves on providing top-notch roofing services that comply with all local building codes. Our team of experienced professionals is well-versed in the FBC requirements and can help guide you in choosing the right underlayment for your home. Whether it’s selecting the best material or ensuring proper installation, we’ve got you covered.


Investing in a robust roofing system is crucial, especially in a state like Florida where the weather can be unforgiving. By adhering to the Florida Building Codes and installing two layers of underlayment, you are taking a significant step towards safeguarding your home from potential damage. At Brehm Roofing, we are committed to providing our clients with durable, long-lasting roofing solutions. Contact us today to learn more about how we can help you meet and exceed roofing standards, ensuring that your home stays protected, come rain or shine.