Codes, Listings, Fire Ratings, Wind Uplift, and Energy Requirements

Five Different Documents—Five Different Jobs

First Identify the Adopted Code

Model codes are not self-enforcing. A state, city, county, or other authority adopts a particular edition and may amend it. Do not assume that the newest International Building Code shown online governs the project.

Determine the adopted building and energy codes, local amendments, permit requirements, and authority having jurisdiction. Also identify owner or insurer requirements that may exceed the code minimum, including FM requirements, high-wind criteria, enhanced hail performance, or project-specific standards.

Liquid-Applied Roofing in the Building Code

The 2024 International Building Code includes liquid-applied roofing in Chapter 15. Code compliance still depends on the complete roof assembly and other applicable provisions, including weather protection, fire classification, wind resistance, materials, drainage, reroofing, and rooftop structures.

A code section recognizing liquid-applied roofing does not mean every roof coating is approved as a new roof covering. The contractor must establish the specific system's permitted use and the evidence supporting the proposed construction.

External Fire Classification

Roof-covering fire classifications commonly address performance when exposed to an external fire source. UL 790 and ASTM E108 include tests involving spread of flame, intermittent flame, and burning brands.

Roof coverings may be classified as Class A, B, or C when tested and constructed within the applicable classification.

Fire Classification Belongs to a Construction

• Deck type and thickness
• Insulation and cover board
• Attachment method
• Existing roof or substrate
• Primer, membrane, reinforcement, coating, surfacing, and application rate
• Slope and other conditions stated in the classification

Do not describe a pail of coating as “Class A” without confirming the listed or classified roof construction and its limitations. A coating that contributes to one Class A construction may not make every existing roof Class A.

External roof-covering classification is also different from an hourly fire-resistance rating for a roof-ceiling assembly. UL 263 and ASTM E119 address fire-resistance testing of building construction. Do not substitute one type of fire evidence for the other.

Wind Uplift Is an Assembly Issue

Wind creates negative pressure that attempts to lift the roof from the building. Required pressures vary by location on the roof and are normally greater at perimeters and corners than in the field.

Building height, location, exposure, enclosure classification, roof geometry, parapets, openings, and other design conditions affect the required resistance.

Common roof-system wind-uplift test methods and approval programs include UL 580, UL 1897, FM Approvals testing, and other code-recognized methods. ASCE/SEI 7 is widely referenced for determining design wind loads; it is not a product approval.

Perimeters, Corners, and Edge Systems

Wind-related failures often begin at the roof edge. Edge metal, copings, gravel stops, gutters, nailers, fasteners, cleats, splice plates, joints, and transitions must be evaluated independently from the field coating.

ANSI/SPRI/FM 4435/ES-1 addresses wind design for edge systems used with low-slope roofing. The contractor should verify the edition referenced by the adopted code or project documents and confirm that the actual edge construction matches the tested or engineered system.

Wrapping coating over loose coping, failed cleats, deteriorated wood nailers, corroded fasteners, or undersized edge metal does not correct the underlying wind-resistance problem.

Using UL, FM, and Evaluation Documentation

ENERGY STAR Roof Products: Avoid an Obsolete Claim

The U.S. Environmental Protection Agency sunset the ENERGY STAR specification for roof products effective June 1, 2022. Contractors should not use an old ENERGY STAR roof-products listing as current proof of compliance.

Use the rating, code, specification, and product documentation actually required for the project, such as current CRRC-rated values or another accepted source identified by the governing requirements.

Reflective Coating Does Not Replace Insulation

Reflective roof surfaces can reduce solar heat gain at the roof surface under appropriate conditions, but they do not add the same thermal resistance as roof insulation.

Do not represent solar reflectance, thermal emittance, or SRI as an insulation R-value.

Energy effects depend on climate, roof insulation, building operation, HVAC efficiency, roof area, surface condition, shading, orientation, and other variables. Make only supportable product and project claims.

Restoration over an Existing Roof

A coating or liquid-applied recover system can change the roof's surface characteristics, but it does not erase the existing assembly. Confirm:

• Whether the existing roof may remain under the adopted reroofing provisions
• Number and type of existing roof coverings
• Condition of deck, insulation, cover board, attachment, membrane, and perimeter
• Extent of wet or deteriorated material requiring removal
• Fire classification of the completed recover construction
• Wind resistance and attachment of the existing and proposed assembly
• Drainage, overflow, slope, edge, and flashing requirements
• Energy-code provisions triggered by the work and applicable exceptions

Claims That Should Stop the Review

• “The product is UL approved,” without the certification category, construction, standard, and limitations.
• “It is FM rated,” without a matching RoofNav assembly and required rating.
• “The coating makes the roof Class A,” without evidence for the completed construction.
• “The coating locks the roof down,” without tested or engineered wind-uplift documentation.
• “It meets all codes,” without identifying the adopted code, section, report, and project conditions.
• “It is ENERGY STAR approved,” relying on the discontinued roof-products program.
• “White means cool roof,” without current rated initial and aged radiative properties.
• “The warranty proves compliance,” when no code or assembly evidence has been submitted.