Moisture-resistant Troldtekt acoustic panels consist of cement-bonded wood wool – a very sturdy and durable material. In short, cement-bonded wood wool is a mixture of wood wool and cement, but it is the curing and setting process which turns the cement into concrete and gives the material its strength. Due to the material’s natural composition of wood and cement, Troldtekt can absorb and give off moisture. Therefore, Troldtekt is very suitable for cladding ceilings and walls in wet rooms such as bathrooms and – not least – swimming baths. Troldtekt is also very suitable under in sheltered outdoor positions such as under eaves or in car ports. Ball impact certification Ceiling and wall cladding in sports facilities and gyms is exposed to considerable impact when, for example, a football strikes the wall at high speed. This requires an outstanding toughness that is both actual and proven:

In Germany, documentation is required for the ‘certification to withstand ball impact’ of the materials in accordance with ‘Prüfung der Ballwurfsicherheit, DIN 18032 Teil 3, Sportshallen für Turnen und Spiele’ (requirements and testing of ball impact safety, DIN 18032, Part 3, sports facilities). The tests are carried out at a laboratory in the facility for research and materials testing for the construction industry (Forschungs- und Materialprüfungsanstalt für das Bauwesen (FMPA)) at the Otto-Graf Institute at the University of Stuttgart. The CE standard for suspended ceilings, EN 13964, also includes ball impact certification as a parameter, and the German tests are performed accordingly. In accordance with EN 13964, Annex D, Impact resistance, Troldtekt is classified as class 1A.

A wide range of structures fitted with Troldtekt acoustic panels have been tested at the institute in Stuttgart and have been approved for use as ceiling and wall cladding in sports facilities. This applies to structures on wooden battens as well as structures suspended in C60 profile systems.

Prüfung der Ballwurfsicherheit DIN 18032, Teil 3, Sportshallen für Turnen und Spiele / EN 13964, Annex D, Impact resistance.

Ceiling cladding
A handball is thrown 36 times against the test ceiling at a velocity of 16.5 ± 0.8 m/s. The shots are thrown 2 × 12 times at an angle of 60° and 1 × 12 times at an angle of 90°.

Wall cladding
A handball is thrown 54 times against the test wall at a velocity of 22.5 ± 1.2 m/s. The shots are thrown 2 × 12 times at an angle of 45° and 1 × 30 times at an angle of 90°.