This service delivers a standardized non-combustibility test for construction materials and product components using the Vertical Furnace Method, as defined in EN ISO 1182. This test determines whether a material can be classified as non-combustible, which is essential for products aiming to meet the highest Euroclass fire safety ratings – namely Class A1 and A2 under EN 13501-1.
In this test, a cylindrical specimen of the material is exposed to elevated temperatures inside a vertically oriented tube furnace. The material is observed for ignition, flame duration, temperature rise, and mass loss. A material is considered non-combustible if it meets strict limits for all these parameters.
The test is particularly relevant for:
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Base materials (e.g., mineral wool, gypsum, concrete, fibre cement)
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Additive components in composite products
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Fire-resistant construction products targeting Class A1 or A2
The test follows EN ISO 1182, which specifies:
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Sample shape: cylindrical, diameter 43–45 mm, height 50 ± 3 mm
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Test temperature: 750°C inside the furnace
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Measurement outcomes:
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Whether sustained flaming occurs
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Maximum temperature rise during combustion
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Final mass loss
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This test is often used in combination with EN ISO 1716 (bomb calorimeter) to fully determine compliance with A1/A2 classification criteria.
The NTUA fire testing laboratory is ISO/IEC 17025:2017 accredited, offering fully compliant and traceable test procedures. Clients receive a detailed test report, which can be used in certification processes, product declarations, or construction approvals.
