Service
UL Solutions tests and certifies thermal barrier materials used with foam plastic insulation or metal composite materials to help verify that the barrier can delay ignition and reduce heat transfer during a fire event. This evaluation supports compliance with building code requirements for assemblies that contain foam plastics left exposed to the building interior.
We perform the two-part NFPA 275, standard method of fire tests for the evaluation of thermal barriers, evaluation. First, we run a temperature transmission assessment aligned with the fire endurance exposure in accordance to UL 263, the Standard for Fire Tests of Building Construction and Materials. Second, we perform an integrity evaluation using large- or intermediate-scale methods referenced by NFPA 275.
Standard method of fire tests for the evaluation of thermal barriers
Standard for Fire Tests of Building Construction and Materials.
Certified thermal barrier systems are listed in UL Product iQ®, including allowances and limitations, so architects, code officials, and specifiers can confirm certification details during design and permitting. Product iQ supports searches by product type, category control number, and related design information.
For material developers who also need thermal conductivity testing services, our Physical Tests for Plastics include the NanoFlash™ method to determine thermal diffusivity and calculate thermal conductivity. This supports material selection and heat management decisions that often accompany insulation system design.
Exterior wall assemblies face thermal and fire performance demands. UL Solutions provides thermal testing of assemblies such as ASTM E1363 as part of our exterior wall system portfolio, along with fire propagation, air, water, and structural performance testing. If your project spans beyond the barrier and into system performance, start here.
When foam plastic insulation is left exposed to the interior of a building, the code requires it to be separated from the occupied space by an approved thermal barrier. UL’s program evaluates barriers intended for use over foam plastics and metal composite materials to address these conditions.
NFPA 275 calls for two evaluations. One measures heat transmission using the UL 263 fire endurance exposure. The other evaluates system integrity using methods such as UL 1715, NFPA 286, UL 1040, or FM 4880 to assess flame spread and smoke development.
Yes. UL Solutions provides global testing and certification solutions that support acceptance in regions including North America, Latin America, Europe, the Middle East, and Asia. This helps manufacturers address market entry requirements efficiently.
Certified systems are listed in UL Product iQ® where you can review conditions of use, assembly details, and related guide information for fire-resistance and passive fire protection categories. Learn how to search Product iQ.
Yes. UL Solutions provides thermal conductivity and diffusivity measurements for plastics using the NanoFlash™ method. These tests help characterize material heat flow behavior during development. See Physical Tests for Plastics.