Commission Delegated Regulation (EU) 2026/331 of 13 February 2026 supplementing Regulation (EU) 2024/3110 of the European Parliament and of the Council by determining classes of performance in relation to the essential characteristic reaction to fire

32026R0331RegulationMay 11, 2026

Open source

of 13 February 2026

supplementing Regulation (EU) 2024/3110 of the European Parliament and of the Council by determining classes of performance in relation to the essential characteristic reaction to fire

(Text with EEA relevance)

Preamble

THE EUROPEAN COMMISSION,

Having regard to the Treaty on the Functioning of the European Union,

Having regard to Regulation (EU) 2024/3110 of the European Parliament and of the Council of 27 November 2024 laying down harmonised rules for the marketing of construction products and repealing Regulation (EU) No 305/2011 1 , and in particular Article 5(5), third subparagraph thereof,

Whereas:

(1) In order to enable manufacturers to declare sufficiently detailed classes of performance of products within the harmonised zone established pursuant to Article 11 of Regulation (EU) 2024/3110, it is necessary to establish classes of performance that are aligned to the latest technological and market developments.

(2) Classes of performance in relation to the essential characteristic reaction to fire were established by Commission Delegated Regulation (EU) 2016/364 2 on the basis of Regulation (EU) No 305/2011 of the European Parliament and of the Council 3 . However, those classes of performance are not applicable under Regulation (EU) 2024/3110. Therefore, in order to keep the continuity of the system, the CPR Acquis Expert Group advised the Commission to establish the same classes of performance set out by Delegated Regulation (EU) 2016/364.

(3) The Commission should therefore determine the classes of performance to be used for the declaration of the essential characteristic reaction to fire,

HAS ADOPTED THIS REGULATION:

Article 1

The classes of performance in relation to the essential characteristic reaction to fire of products shall be those set out in the Annex.

Article 2

This Regulation shall enter into force on the twentieth day following that of its publication in the Official Journal of the European Union .

Final provisions

This Regulation shall be binding in its entirety and directly applicable in all Member States. Done at Brussels, 13 February 2026. For the Commission The President Ursula VON DER LEYEN

1 OJ L, 2024/3110, 18.12.2024, ELI: http://data.europa.eu/eli/reg/2024/3110/oj .

2 Commission Delegated Regulation (EU) 2016/364 of 1 July 2015 on the classification of the reaction to fire performance of construction products pursuant to Regulation (EU) No 305/2011 of the European Parliament and of the Council ( OJ L 68, 15.3.2016, p. 4 , ELI: http://data.europa.eu/eli/reg_del/2016/364/oj ).

3 Regulation (EU) No 305/2011 of the European Parliament and of the Council of 9 March 2011 laying down harmonised conditions for the marketing of construction products and repealing Council Directive 89/106/EEC ( OJ L 88, 4.4.2011, p. 5 , ELI: http://data.europa.eu/eli/reg/2011/305/oj ).

A. SYMBOLS

For the purposes of this Annex, the following symbols apply:

For all classes
ΔΤtemperature rise
Δmmass loss
t fduration of flaming
PCSgross calorific potential
LFSlateral flame spread
SMOGRAsmoke growth rate
For all classes except for classes related to electric cables
FIGRAfire growth rate
THRtotal heat release
TSPtotal smoke production
Fsflame spread
For classes related to electric cables only
HRR sm30 , kWheat release rate averaged by a 30-s sliding average
SPR sm60 , m 2 /ssmoke production rate averaged by a 60-s sliding average
Peak HRR, kWmaximum of HRR sm30 between test start and end of test, excluded contribution from ignition source
Peak SPR, m 2 /smaximum of SPR sm60 between test start and end of test
THR 1200 , MJtotal heat release (HRR sm30 ) from test start until end of test, excluded contribution from ignition source
TSP 1200 , m 2total smoke production (HRR sm60 ) from test start until end of test
FIGRA, W/sfire growth rate index defined as the highest value of the quotient between HRR sm30 excluding the contribution of ignition source and time. Threshold values HRR sm30 = 3 kW and THR = 0,4 MJ
FSflame spread (damaged length)
Hflame spread

B. DEFINITIONS

For the purposes of this Annex the following definitions apply:

(1) ‘material’ means a single basic substance or uniformly dispersed mixture of substances;

(2) ‘homogeneous product’ means a product consisting of a single material, having uniform density and composition throughout the product;

(3) ‘non-homogeneous product’ means a product that does not satisfy the requirements of a homogeneous product and that is composed of one or more components, substantial and/or non-substantial;

(4) ‘substantial component’ means a material that constitutes a significant part of a non-homogeneous product. A layer with a mass per unit area ≥ 1,0 kg/m 2 or a thickness ≥ 1,0 mm is considered to be a substantial component;

(5) ‘non-substantial component’ means a material that does not constitute a significant part of a non-homogeneous product. A layer with a mass per unit area < 1,0 kg/m 2 and a thickness < 1,0 mm is considered to be a non- substantial component. Two or more non-substantial layers that are adjacent to each other, where there are no substantial components in between the layers, are considered as one non-substantial component and are classified in accordance with the criteria for a layer that is a non-substantial component;

(6) ‘internal non-substantial component’ means a non-substantial component that is covered on both sides by at least one substantial component;

(7) ‘external non-substantial component’ means a non-substantial component that is not covered on one side by a substantial component.

C. CLASSES OF PERFORMANCE IN RELATION TO THE ESSENTIAL CHARACTERISTIC REACTION TO FIRE OF PRODUCTS

General

The relevant definitions, tests and performance criteria are fully described or referenced in the relevant harmonised technical specifications, European assessment documents, European reaction to fire classification standards and European testing standards.

1. Products excluding floorings, linear pipe thermal insulation products, and electric cables

Table 1

ClassTest method(s)Classification criteriaAdditional classification
A1Non-combustibility test 1 ;
and		ΔΤ ≤ 30 °C;
and
Δm ≤ 50 %;
and
t f = 0 (that is to say, no sustained flaming).
Heat of combustion testPCS ≤ 2,0 MJkg -1 1 ;
and
PCS ≤ 2,0 MJkg -1 2 3 ;
and
PCS ≤ 1,4 MJm -2 4 ;
and
PCS ≤ 2,0 MJkg -1 5 .
A2Non-combustibility test 1 ;
or		ΔΤ ≤ 50 °C;
and
Δm ≤ 50 %;
and
t f ≤ 20 s.
Heat of combustion test;
and		PCS ≤ 3,0 MJkg -1 1 ;
and
PCS ≤ 4,0 MJm -2 2 ;
and
PCS ≤ 4,0 MJm -2 4 ;
and
PCS ≤ 3,0 MJkg -1 5 .
Single burning item test).FIGRA 0,2MJ ≤ 120 Ws -1 ;
and
LFS < edge of specimen;
and
THR 600s ≤ 7,5 MJ.		Smoke production 6 ;
and
Flaming droplets/particles 7 .
BSingle burning item test;
and		FIGRA 0,2MJ ≤ 120 Ws -1 ;
and
LFS < edge of specimen;
and
THR 600s ≤ 7,5 MJ.		Smoke production 6 ;
and
Flaming droplets/particles 7 .
Ignitability test 8 :
Exposure = 30 s.		Fs ≤ 150 mm within 60 s.
CSingle burning item test;
and		FIGRA 0,4MJ ≤ 250 Ws -1 ;
and
LFS < edge of specimen;
and
THR 600s ≤ 15 MJ.		Smoke production 6 ;
and
Flaming droplets/particles 7 .
Ignitability test 8 :
Exposure = 30 s.		Fs ≤ 150 mm within 60 s.
DSingle burning item test;
and		FIGRA 0,4MJ ≤ 750 Ws -1 .Smoke production 6 ;
and
Flaming droplets/particles 7 .
Ignitability test 8 :
Exposure = 30 s.		Fs ≤ 150 mm within 60 s.
EIgnitability test 8 :
Exposure = 15 s.		Fs ≤ 150 mm within 20 s.Flaming droplets/particles 9
FIgnitability test 8 :
Exposure = 15 s.		Fs > 150 mm within 20 s.
1 For homogeneous products and substantial components of non-homogeneous products.
2 For any external non-substantial component of non-homogeneous products.
3 Alternatively, any external non-substantial component having a PCS ≤ 2,0 MJm -2 , provided that the product satisfies the following criteria of Single burning item test: FIGRA ≤ 20 Ws -1 ; and
LFS < edge of specimen; and
THR 600s ≤ 4,0 MJ; and
s1; and
d0.
4 For any internal non-substantial component of non-homogeneous products.
5 For the product as a whole.
6 s1 = SMOGRA ≤ 30 m 2 s -2 and TSP 600s ≤ 50 m 2 ;
s2 = SMOGRA ≤ 180 m 2 s -2 and TSP 600s ≤ 200 m 2 ;
s3 = not s1 or s2.
7 d0 = no flaming droplets/particles in Single burning item test within 600 s;
d1 = no flaming droplets/particles persisting longer than 10 s in Single burning item test within 600 s;
d2 = not d0 or d1;
Ignition of the paper in Ignitability test results in a d2 classification.
8 Under conditions of surface flame attack and, if appropriate to the intended use of the product, edge flame attack.
9 No ignition of the paper = no additional classification;
Ignition of the paper = d2 classification.

2. Floorings

Table 2

ClassTest method(s)Classification criteriaAdditional classification
A1 FLNon-combustibility test 10 ;
and		ΔΤ ≤ 30 °C;
and
Δm ≤ 50 %;
and
t f = 0 (that is to say, no sustained flaming).
Heat of combustion test.PCS ≤ 2,0 MJkg -1 10 ;
and
PCS ≤ 2,0 MJkg -1 11 ;
and
PCS ≤ 1,4 MJm -2 12 ;
and
PCS ≤ 2,0 MJkg -1 13 .
A2 FLNon-combustibility test 10 ;
or		ΔΤ ≤ 50 °C;
and
Δm ≤ 50 %;
and
t f ≤ 20 s.
Heat of combustion test;
and		PCS ≤ 3,0 MJkg -1 10 ;
and
PCS ≤ 4,0 MJm -2 11 ;
and
PCS ≤ 4,0 MJm -2 12 ;
and
PCS ≤ 3,0 MJkg -1 13 .
Determination of the burning behaviour using a radiant heat source test 14 .Critical flux 15 ≥ 8,0 kWm -2 .Smoke production 16 .
B FLDetermination of the burning behaviour using a radiant heat source test 14 ;
and		Critical flux 15 ≥ 8,0 kWm -2 .Smoke production 16 .
Ignitability test 17 :
Exposure = 15 s.		Fs ≤ 150 mm within 20 s.
C FLDetermination of the burning behaviour using a radiant heat source test 14 ;
and		Critical flux 15 ≥ 4,5 kWm -2 .Smoke production 16 .
Ignitability test 17 :
Exposure = 15 s.		Fs ≤ 150 mm within 20 s.
D FLDetermination of the burning behaviour using a radiant heat source test 14 ;
and		Critical flux 15 ≥ 3,0 kWm -2 .Smoke production 16 .
Ignitability test 17 :
Exposure = 15 s.		Fs ≤ 150 mm within 20 s.
E FLIgnitability test 17 :
Exposure = 15 s.		Fs ≤ 150 mm within 20 s.
F FLIgnitability test 17 :
Exposure = 15 s.		Fs > 150 mm within 20 s.
10 For homogeneous products and substantial components of non-homogeneous products.
11 For any external non-substantial component of non-homogeneous products.
12 For any internal non-substantial component of non-homogeneous products.
13 For the product as a whole.
14 Test duration = 30 minutes.
15 Critical flux is defined as the radiant flux at which the flame extinguishes or the radiant flux after a test period of 30 minutes, whichever is the lower (i.e. the flux corresponding with the furthest extent of spread of flame).
16 s1 = smoke ≤ 750 %.min;
s2 = not s1.
17 Under conditions of surface flame attack and, if appropriate to the intended use of the product, edge flame attack.

3. Linear pipe insulation products

Table 3

ClassTest method(s)Classification criteriaAdditional classification
A1 LNon-combustibility test 18 ;
and		ΔΤ ≤ 30 °C;
and
Δm ≤ 50 %;
and
t f = 0 (that is to say, no sustained flaming).
Heat of combustion test.PCS ≤ 2,0 MJkg -1 18 ;
and
PCS ≤ 2,0 MJkg -1 19 ;
and
PCS ≤ 1,4 MJm -2 20 ;
and
PCS ≤ 2,0 MJkg -1 21 .
A2 LNon-combustibility test 18 ;
or		ΔΤ ≤ 50 °C;
and
Δm ≤ 50 %;
and
t f ≤ 20 s.
Heat of combustion test;
and		PCS ≤ 3,0 MJkg -1 18 ;
and
PCS ≤ 4,0 MJm -2 19 ;
and
PCS ≤ 4,0 MJm -2 20 ;
and
PCS ≤ 3,0 MJkg -1 21 .
Single burning item test.FIGRA 0,2MJ ≤ 270 Ws -1 ;
and
LFS < edge of specimen;
and
THR 600s ≤ 7,5 MJ.		Smoke production 22 ;
and
Flaming droplets/particles 23 .
B LSingle burning item test;
and		FIGRA 0,2MJ ≤ 270 Ws -1 ;
and
LFS < edge of specimen;
and
THR 600s ≤ 7,5 MJ.		Smoke production 22 ;
and
Flaming droplets/particles 23 .
Ignitability test 24 :
Exposure = 30 s.		Fs ≤ 150 mm within 60 s.
C LSingle burning item test;
and		FIGRA 0,2MJ ≤ 460 Ws -1 ;
and
LFS < edge of specimen;
and
THR 600s ≤ 15 MJ.		Smoke production 22 ;
and
Flaming droplets/particles 23 .
Ignitability test 24 :
Exposure = 30 s.		Fs ≤ 150 mm within 60 s.
D LSingle burning item test;
and		FIGRA 0,4MJ ≤ 2 100 Ws -1 ;
and
THR 600s ≤ 100 MJ.		Smoke production 22 ;
and
Flaming droplets/particles 23 .
Ignitability test 24 :
Exposure = 30 s.		Fs ≤ 150 mm within 60 s.
E LIgnitability test 24 :
Exposure = 15 s.		Fs ≤ 150 mm within 20 s.Flaming droplets/particles 25 .
F LIgnitability test 24 :
Exposure = 15 s.		Fs > 150 mm within 20 s.
18 For homogeneous products and substantial components of non-homogeneous products.
19 For any external non-substantial component of non-homogeneous products.
20 For any internal non-substantial component of non-homogeneous products.
21 For the product as a whole.
22 s1 = SMOGRA ≤ 105 m 2 s -2 and TSP 600s ≤ 250 m 2 ;
s2 = SMOGRA ≤ 580 m 2 s -2 and TSP 600s ≤ 1 600 m 2 ;
s3 = not s1 or s2.
23 d0 = no flaming droplets/particles in Single burning item test within 600 s;
d1 = no flaming droplets/particles persisting longer than 10 s in Single burning item test within 600 s;
d2 = not d0 or d1;
Ignition of the paper in Ignitability test results in a d2 classification.
24 Under conditions of surface flame attack and, if appropriate to the intended use of the product, edge flame attack.
25 No ignition of the paper = no additional classification;
Ignition of the paper = d2 classification.

4. Electric cables

Table 4

ClassTest method(s)Classification criteriaAdditional classification
A caHeat of combustion test.PCS ≤ 2,0 MJkg -1 26 .
B1 caBurning behaviour and smoke production of bunched cable test (30 kW flame source);
and		FS ≤ 1,75 m;
and
THR 1200s ≤ 10 MJ
and
Peak HRR ≤ 20 kW
and
FIGRA ≤ 120 Ws -1 .		Smoke production 27 28 ;
and
Flaming droplets/particles 29 ;
and
Acidity (pH and conductivity) 30 .
Vertical flame spread of single cable test.H ≤ 425 mm.
B2 caBurning behaviour and smoke production of bunched cable test (20,5 kW flame source);
and		FS ≤ 1,5 m;
and
THR 1200s ≤ 15 MJ
and
Peak HRR ≤ 30 kW
and
FIGRA ≤ 150 Ws -1 .		Smoke production 27 31 ;
and
Flaming droplets/particles 29 ;
and
Acidity (pH and conductivity) 30 .
Vertical flame spread of single cable test.H ≤ 425 mm.
C caBurning behaviour and smoke production of bunched cable test (20,5 kW flame source);
and		FS ≤ 2,0 m;
and
THR 1200s ≤ 30 MJ;
and
Peak HRR ≤ 60 kW;
and
FIGRA ≤ 300 Ws -1 .		Smoke production 27 31 ;
and
Flaming droplets/particles 29 ;
and
Acidity (pH and conductivity) 30 .
Vertical flame spread of single cable test.H ≤ 425 mm.
D caBurning behaviour and smoke production of bunched cable test (20,5 kW flame source);
and		THR 1200s ≤ 70 MJ;
and
Peak HRR ≤ 400 kW;
and
FIGRA ≤ 1 300 Ws -1 .		Smoke production 27 31 ;
and
Flaming droplets/particles 29 ;
and
Acidity (pH and conductivity) 30 .
Vertical flame spread of single cable test.H ≤ 425 mm.
E caVertical flame spread of single cable test.H ≤ 425 mm.
F caVertical flame spread of single cable test.H > 425 mm.
a1 = conductivity < 2,5 μS/mm and pH > 4,3;

Footnotes

  1. For homogeneous products and substantial components of non-homogeneous products. ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7

  2. s2 = TSP1200 ≤ 400 m2 and Peak SPR ≤ 1,5 m2/s; ↩ ↩2 ↩3 ↩4 ↩5

  3. Alternatively, any external non-substantial component having a PCS ≤ 2,0 MJm-2, provided that the product satisfies the following criteria of Single burning item test: FIGRA ≤ 20 Ws-1; and ↩ ↩2 ↩3 ↩4

  4. For any internal non-substantial component of non-homogeneous products. ↩ ↩2 ↩3

  5. For the product as a whole. ↩ ↩2 ↩3

  6. s1 = SMOGRA ≤ 30 m2s-2 and TSP600s ≤ 50 m2; ↩ ↩2 ↩3 ↩4 ↩5

  7. d0 = no flaming droplets/particles in Single burning item test within 600 s; ↩ ↩2 ↩3 ↩4 ↩5

  8. Under conditions of surface flame attack and, if appropriate to the intended use of the product, edge flame attack. ↩ ↩2 ↩3 ↩4 ↩5 ↩6

  9. No ignition of the paper = no additional classification; ↩ ↩2

  10. For homogeneous products and substantial components of non-homogeneous products. ↩ ↩2 ↩3 ↩4 ↩5

  11. For any external non-substantial component of non-homogeneous products. ↩ ↩2 ↩3

  12. For any internal non-substantial component of non-homogeneous products. ↩ ↩2 ↩3

  13. For the product as a whole. ↩ ↩2 ↩3

  14. Test duration = 30 minutes. ↩ ↩2 ↩3 ↩4 ↩5

  15. Critical flux is defined as the radiant flux at which the flame extinguishes or the radiant flux after a test period of 30 minutes, whichever is the lower (i.e. the flux corresponding with the furthest extent of spread of flame). ↩ ↩2 ↩3 ↩4 ↩5

  16. s1 = smoke ≤ 750 %.min; ↩ ↩2 ↩3 ↩4 ↩5

  17. Under conditions of surface flame attack and, if appropriate to the intended use of the product, edge flame attack. ↩ ↩2 ↩3 ↩4 ↩5 ↩6

  18. For homogeneous products and substantial components of non-homogeneous products. ↩ ↩2 ↩3 ↩4 ↩5

  19. For any external non-substantial component of non-homogeneous products. ↩ ↩2 ↩3

  20. For any internal non-substantial component of non-homogeneous products. ↩ ↩2 ↩3

  21. For the product as a whole. ↩ ↩2 ↩3

  22. s1 = SMOGRA ≤ 105 m2s-2 and TSP600s ≤ 250 m2; ↩ ↩2 ↩3 ↩4 ↩5

  23. d0 = no flaming droplets/particles in Single burning item test within 600 s; ↩ ↩2 ↩3 ↩4 ↩5

  24. Under conditions of surface flame attack and, if appropriate to the intended use of the product, edge flame attack. ↩ ↩2 ↩3 ↩4 ↩5 ↩6

  25. No ignition of the paper = no additional classification; ↩ ↩2

  26. For the product as a whole, excluding metallic materials, and for any external component (that is to say, sheath) of the product. ↩

  27. s1 = TSP1200 ≤ 50 m2 and Peak SPR ≤ 0,25 m2/s; ↩ ↩2 ↩3 ↩4

  28. The smoke class declared for class B1ca cables must originate from the Burning behaviour and smoke production of bunched cable test (30 kW flame source). ↩

  29. d0 = no flaming droplets/particles within 1 200 s; ↩ ↩2 ↩3 ↩4

  30. Acidity of gases produced by burning cables test: ↩ ↩2 ↩3 ↩4

  31. The smoke class declared for class B2ca, Cca, Dca cables must originate from the Burning behaviour and smoke production of bunched cable test (20,5 kW flame source). ↩ ↩2 ↩3

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