Commercial Steep Roof Systems

A commercial steep roof is defined as having a slope or pitch greater than 3:12, meaning it rises at least 3 vertical inches for every 12 horizontal inches. This system is used for enhanced water runoff and architectural appeal, and it is governed by specific building codes in Florida to withstand hurricanes and other harsh weather.

We at Southern Roofing Group specialize in the application of all commercial steep roof systems for your commercial roofing needs.

Commercial Asphalt Shingles

Commercial Metal Roofing

Commercial Clay & Concrete Tiles

Some Detailed info on Commercial Steep Roof Options Common materials for commercial steep roofs

Asphalt shingles: A popular, affordable, and durable option that offers good weather resistance.
Metal roofing: Highly durable, fire-resistant, and energy-efficient. Panels are fastened with clips, and proper installation is critical to prevent leaks. Standing seam metal roof panel systems are permitted at lower slopes (down to 1:12) if they meet specific static water leakage tests.
Clay and concrete tiles: Offer a distinct look, exceptional durability, and weather resistance. Installation is more expensive than shingles.

Aspect	Advantages of steep roofs	Disadvantages of steep roofs
Durability and maintenance	Better water and debris runoff, which reduces potential damage, leaks, and maintenance. The roof is exposed to less direct sunlight, which can prolong its lifespan.	Requires more specialized labor for installation and maintenance due to safety risks associated with working on steep inclines, which can increase costs.
Energy efficiency	Improved airflow from the attic space helps regulate the building’s temperature, potentially lowering heating and cooling costs.	Attic space can be an insulating buffer, but it can also create unusable space.
Aesthetics	The wide range of available materials offers design flexibility and can significantly boost a commercial property’s curb appeal.	Costlier materials like slate or tile may not be practical for large commercial buildings.

Florida building code requirements

Because of the high risk of hurricanes and water intrusion, Florida has strict building codes for roofing that are particularly stringent in high-velocity hurricane zones (HVHZ), which include Pompano Beach.

Wind and water resistance: The 2023 Florida building codes (8th Edition) include enhanced requirements for new roofs and roof replacements to improve wind and water infiltration resistance.
Underlayment: For slopes of 4:12 or greater, one layer of specific ASTM-compliant underlayment must be applied shingle-fashion, with required fastening schedules. Alternatively, a self-adhering polymer-modified bitumen sheet that meets specific ASTM standards can be used to cover the entire roof deck.
HVHZ application: Specific requirements with associated roofing application standards (RAS) and testing application standards (TAS) must be followed within HVHZs.
The 25% Rule (updated): While the original rule could mandate full replacement if damage exceeded 25% of a roof area, the Florida legislature updated it in 2022. Buildings with roofs installed after March 1, 2009, according to the 2007 FBC, may have a path to avoid full replacement under certain conditions.