Kingspan is dedicated to providing premium-performance, innovative insulation solutions that not only deliver superior construction efficiencies and lifetime performance, but that are underpinned by extensive system fire testing and proven fire performance.

What Underpins the Fire Performance of Kingspan's Insulation Boards?

In terms of reaction to fire, and in accordance with the Euroclass system, Kingspan Kooltherm insulation products can achieve as good as B,s2,d0. Our products with bonded facers, for example Kooltherm K110 PLUS, can achieve as good as B,s1,d0, which is the highest possible performance for a material that is 'combustible':

  • B - Very limited contribution to fire and will not lead to flashover
  • s1 - Little or no smoke production
  • d0 - No flaming droplets / particles

All euroclass ratings for Kooltherm, OPTIM-R, QuadCore, Therma, Kingspan GreenGuard and K-Roc products can be found on their respective product pages.

In addition, Kingspan's thermoset insulation can also offer high levels of fire resistance. Our Kooltherm K12 product, tested to BS EN 1365-1 in the construction below achieved a result of 49 minutes in all three (REI) categories, comfortably meeting the 30-minute legal minimum fire resistance for this construction in the UK.

Test Construction Result
BS EN 1365-1: 1999 15 mm plasterboard, 38 mm x 38 mm timber battens, 25 mm Kooltherm K12 Framing Board fixed to internal face of studs, 70 mm Kooltherm K12 Framing Board fitted between 89 mm x 38 mm studs, with 9 mm OSB sheathing. Achieved 49 minutes insulation, loadbearing capacity and integrity

Kingspan Thermaroof TR26 & TR27 are also FM Approved in specific constructions. These products are subjected to rigorous insurance industry large-scale fire tests and associated ongoing audits.

Kingspan Kooltherm K5 & K15 have been tested in specific systems to BS 8414-1: 2015 + A1: 2017 and BS 8414-2: 2005 / BS 8414-2: 2015 + A1: 2017, or both, in accordance with the performance criteria set out in BR 135: 2013. Please see link below to our tested system repository.

Kingspan Kooltherm Charring Demonstration

This video shows how Kingspan Kooltherm insulation chars when it is burnt and self-extinguishes when removed from a heat source. Find out more here:

Comparative BS 8414 System Tests

Side by side footage of BS8414 tests featuring two different insulation types shows that systems which feature insulation that is not classified as 'non-combustible', may perform as well as systems that feature insulation that is classified as 'non-combustible'.

The relative impacts on facade fire spread of different types of insulation & ACM

This video illustrates, using ISO 13785: 1 tests, that the impact of using PE cored ACMs has far greater impact on the cladding system performance than whether the insulation material used is combustible or not.

A commitment to fire safety

Here at Kingspan we aim to provide clear and proven information about our products and their fire performance. Click on the pages below to learn more.

Kingspan Insulation Ltd

For queries relating to insulation boards, cavity closers or membranes.





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