Humidity resistance Info
      to 95 % RH

Humidity resistance

Suspended ceilings are exposed to extreme stresses in areas such as swimming pools and bathrooms.

Humidity is measured as relative humidity (RH) and also always depends on the room temperature.

OWA mineral wool plates can withstand humidity of up to 100% depending on the dimensions and the design.

Sound absorption Info
      αw =  0.55
NRC =  0.55

Sound absorption

Sound absorption means that the sound energy is swallowed by components such as the OWA ceiling elements, i.e. it is not reflected.

The indicated degree of sound absorption αw defines the ratio of reflected to absorbed sound energy. A value of 0 corresponds to total reflection; a value of 1, in contrast, is complete absorption.

The indicated degree of sound absorption is determined in accordance with DIN EN 11654 and relates to an audio frequency of 500 Hz.

Resistance to fire Info
      to F 120 (DIN 4102)
up to REI 180 (DIN EN 13501-2)


Resistance to fire
Proven protection against fire

OWA ceiling systems provide effective protection against fires by preventing the fire from spreading for a certain period of time.

DIN 4102 divides components into various fire resistance classes: "F120 – fire resistant" means that a ceiling system can withstand a fire for 120 minutes.

Our ceiling systems have successfully passed fire tests in accordance with DIN 4102 or the European standards.

Possible system combinations:
please select 
Mineral tile Logos
Reaction to fire
A2-s1,d0 under DIN EN 13501-1
Particular class ISO 5 (ISO 14644-1:1999)
15 mm nominal
Thickness (inches)
5/8“ nominal
Light reflection
91 (ISO 7724-2, ISO 7724-3) nominal
Linear sound insulation
from 31 to 49 dB


Resistance to fire and linear sound insulation depending on system, structural slab and other additional measures

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