The surfaces of the ceiling elements in healthcare facilities must be cleaned or disinfected regularly, taking hygiene aspects into account, depending on the area of application.
The materials on the visible side of the tiles must be able to withstand these processes without restricting their specific properties. In principal, it is recommended to consult a hygienist when choosing the material for the ceilings in healthcare facilities.
It is important to use only the right cleaning method with the appropriate cleaning agents for each face coating of the ceiling tiles.
The following types of cleaning are possible:
A normal vacuum cleaner should be used as the standard cleaning method for dust, loose dirt and / or deposits, provided it has a soft brush.
The surfaces can be cleaned with a damp cloth for more intensive cleaning. This must always be done with a squeezed out, soft cloth or sponge. After cleaning, the surface must be dried with a soft cloth.
Wet cleaning must be carried out with lukewarm water (up to 40 ° C) using a sponge and in combination with a mild cleaning agent (pH value between 7 and 9). Make sure that the edges and the back of the tiles do not come into contact with moisture. After cleaning, the surfaces must be dried.
Pressure cleaning must only be carried out for ceilings with an exposed, pressure-resistant construction (Exposed System - System C, edge SK) under the following technical requirements:
- Water temperature: max. 40 °
- Working pressure: max. 80 bar, the delivery rate may be max. 500 l / h
- Spray angle (nozzle): at least 30 °
- Minimum distance: 1.0 m (nozzle - surface)
With cleaning methods 2 to 4, it is essential to prevent moisture from penetrating into the substructure. Before cleaning the ceiling surface, it is worth carrying out a test on a non-visible tile or on a test piece in order to assess the effect and to rule out any interactions with the coating. Abrasives are generally not suitable.
Knauf AMF provides an overview table with the most suitable cleaning method for each ceiling tile surface (
- page 15).
In certain areas of application, hygiene regulations require the face side of the ceiling tiles to be disinfected. Therefore, when selecting the material, make sure that the surfaces are resistant to disinfectants.
The determination of the material compatibility when using disinfectants is carried out according to EN ISO 2812-3: 2012 and EN 12720: 2013. The tests simulate exposure over 3, 9 and 15 years. The evaluation is carried out in grades from 5 (no change in the test areas) to 1 (major change).
Knauf AMF has proven the disinfection resistance of the relevant ceiling tiles. The systems and the respective suitable disinfectants are clearly shown in a table (
- page 13).
Humidity and corrosion resistance
The air humidity has a significant influence on the stability and structure of a mineral ceiling and thus its durability. In many cases, high water vapour content leads to loss of dimensional stability and deformation. Air behaves like a sponge and, depending on the temperature, can absorb water in the form of steam. In addition to the resistance of the tiles to high humidity, the substructure in such areas should be made corrosion-resistant. EN 13964: 2014 "Suspended ceilings - requirements and test methods" specifies exposure classes.