All building products have to comply with the criteria of the Dutch Building Decree.
Table 1: test methods reaction to fire presentation | Product | Test method | Class | | For building products expected flooring | NEN 6065 "Contribution to fire propagation", resulting in classes 1 (best) to 5.
Classification is the result of two tests:
- "Flash-over box test"
- "Surface spread of flame test" (similar to English BS 476-7) | From 1 to 5 | | NEN 6066 "Smoke production" (ISO dual chamber box), resulting in a smoke density measured in m-1 | | | NEN 6064 non-combustibility (similar to ISO 1182, also used in the Euroclass system) | | | For floorings | NEN 1775 "Contribution to fire propagation".
Classification in T1 is the result of two tests:
- "Flooring radiant panel test" (similar to ISO 9239-1, also used in the Euroclass system)
- "Small flame test" (similar to ISO 11925-2, also used in the Euroclass system) | From T1 to T3 | | NEN 6066 "Smoke production" (ISO dual chamber box), resulting in a smoke density measured in m-1 | |
In the Building Decree, basis requirements are given for all building products, with additional requirements near fireplaces and in chimneys, in escape routes and for facades. The smoke requirements are only valid inside buildings(see table below). Table 2: main building requirement | Example of component | Fire behaviour according to NEN 6065 | Fire behaviour according to NEN 1775 | Smoke density according to NEN 6066 | | Area ducts, chimneys | 1 Non-flammable | | | | Main escape ways | 1 Non-flammable | | < 5.4 m-1 | | Facade up to 2.5 m above ground level for buildings with floors levels above 5m | 1 Non-flammable | | | | Main escape ways | 2 Weakly flammable | T1 | < 2.2 m-1 | | Façade | 2 Weakly flammable | | | | Floors | 3 Low flammability | T3 | < 10 m-1 | | Floos from main escape routes | | | | | All building materials excluding floorings | 4 Moderately flammable | | < 10 m-1 | | | 5 High flammability | | |
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