Processing guidelines

To ensure that everything goes well 

Service, security and much, much more

With the Dekozell system nothing will go wrong providing you adhere to the installation processes and product data sheets. Observing the relevant technical specification, information and approvals of the products.

No offence intended: Applicability and completeness must be checked by the installer and customer; their own responsibility must be taken for the proposed construction project. All specifications and information must be adapted to conform to local regulations.

Likewise, all information provided does not replace detailed work or installation planning. No matter what: Dekozell is ready to advise and help in all aspects of your project. In case of any concern or query we are on hand remotely to assist, as and when you need us. If in doubt, please contact us.

DEKOZELL® System Flexopanel



Our best-selling system: very flat, light as a feather, uniquely sound absorbing. Simply wallpaper walls and ceilings, even in swimming pools.



Turn any GK perforated panel into a seamlessly smooth heating/cooling acoustic ceiling. Even ball-proof for sports and multi-purpose halls.

DEKOZELL® System GK-Loch
DEKOZELL® System Robust



Ball-proof, even for walls: maximum impact resistance, installation depth of up to 5 cm for spotlights and cables, suitable for swimming pools and weathered outdoor areas.



Anyone who likes mineral wool will get their money’s worth here. The all-rounder for heat and sound insulation. Up to 5 cm installation depth for spotlights and cables, not suitable for swimming pools or external walls.

DEKOZELL® System Maxiswing
DEKOZELL® System Moderat



Prime, spray on, done. Inexpensive, possible on very uneven substrates. For revitalised rough surfaces, popular in brutalist architecture such as the industrial look or on unplastered concrete.


Do you have any questions? Give us a call!

Vivian Neubauer
Vivian Neubauer
Dipl.-Ing. Printing Technology
Thomas Neubauer
Thomas Neubauer
Dipl.-Ing. Process Engineering, Master of Business Administration

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Acoustic Spray Plaster

Specially developed for easy spraying of smooth and seamless surfaces. As a final coating for our smart coating systems, it provides a huge leap in performance and possibilities.

1. Types of utilisation

DIN 18041 (audibility in small and medium-sized rooms) distinguishes between different types of room utilisation. When a room is used for making music, a certain amount of reverberation is desirable so that the room “carries” the sounds. If the room is used for speech, two people can have a reasonable conversation, but if there are many children in the room, the individual sound pressure levels quickly add up again. If a room is used for normal school lessons or as a kindergarten room, the requirements for the amount of sound absorber capacity to be installed are correspondingly higher. However, a compromise often has to be found between the reverberation time to be achieved and the actual structural possibilities.
We would be happy to advise you on this for your specific project, including solutions from other manufacturers.

Overview of the categorisation of types of use


  • Music classroom with active music-making and singing;
  • Council and banqueting hall for musical performances.


  • Courtroom and council chamber
  • Community hall, meeting room
  • Music rehearsal room in music schools or similar
  • Sports hall and swimming pool with an audience


  • Classroom (except for music);
  • Music classroom with audiovisual presentation
  • Group rooms in kindergartens and day care centres, day care centres for the elderly
  • Seminar room, interaction room
  • Lecture theatre
  • Room for tele-teaching
  • Meeting room, conference room
  • Performance room for electro-acoustic use only

Sport 1

  • Sports halls and swimming pools without an audience for normal use and/or single class operation (one class or sports group, standardised communication content)

Sport 2

  • Sports halls and swimming pools without an audience for multiple classes
2. acoustically open window A o.F.

In order to reduce the reverberation time in a room to a certain value, a corresponding amount of so-called “acoustically open window” must be installed. This is an arithmetical auxiliary value that is specified in virtual square metres. A large window front that can be opened completely is an almost sound-reflecting surface when closed. When open, however, precisely this window surface forms an “acoustically open window” from an acoustic point of view – even with an efficiency (sound absorption coefficient) of 100%! In order to reduce the reverberation time in the room to an appropriate level, a corresponding amount of “acoustically open window” must also be installed in the room – strategically distributed throughout the room. The calculation value for the acoustically open window results from the sum of all sound-absorbing surfaces in the room, which have previously been multiplied by their respective sound absorption coefficient. We would be happy to advise you on this for your specific project, including solutions from other manufacturers.

3. Reverberation time T N-set

The reverberation time is the measurement by which you can judge the “reverberation” of a room. If a loud bang is produced in a room (e.g. by clapping your hands vigorously), you can almost count how long it takes for the reverberation to subside if the reverberation time is longer than 1.5 seconds. The eardrum in the human ear has a moment of inertia of approximately 0.7 seconds. Accordingly, reverberation times of more than 0.7 seconds are usually perceived as quite reverberant, while reverberation times of less than 0.7 seconds are much more pleasant. However, the actual target reverberation time for a room depends on its volume and the planned type of use for the room. Please use the acoustics calculator above. We would be happy to advise you on this for your specific property, including solutions from other manufacturers.

Professionally, the reverberation time is determined using appropriate sound pressure level measuring devices that measure the decay of the reverberation in the room. In simpler cases, the sound pressure level required for the measurement is generated by a shot from a shotgun or the bang of a starter flap, such as is used in a 100m race. In professional measurements, which also measure individual frequencies individually, special loudspeakers are set up in the room (so-called dodecahedrons), through which the room is filled with special noise. The decay time of the sound pressure level generated by the noise in the room is then measured. Should such a measurement be necessary, we will be happy to help you find a professional room acoustician.

Our systems

Systematically more possibilities. Acoustic ceilings, straight and curved walls, perfect edge finishes or curved domes can be provided with acoustic coatings more reliably than ever before.

Frequently Asked Questions (FAQ)

We frequently receive similar questions about acoustic plaster, acoustic ceilings and DEKOZELL in general. Here, we have summarised our answers for you.

Why have I never heard of DEKOZELL?

Seamless acoustic plaster systems are still a niche product. Most acoustic ceilings are installed as visible solutions, e.g. as perforated panels with visible holes or as grid cassette ceilings with visible 60×60 insert panels. We only make seamless and therefore invisible acoustic ceilings. Our smooth acoustic plaster coating is visually indistinguishable from a smoothly levelled ceiling – and therefore invisible. We are at home in concealment.  

Where can I buy DEKOZELL?

Directly from us. Because every project is an important multiplier for all of us and should be a perfect success. As an acoustic plaster is much more complex than a bag of cement, we seek to be close to the installer. In our experience, this is the only way to provide the necessary support during processing.

Is DEKOZELL also available commercially?

For very large projects, we use your trusted building materials dealer as an invoicing partner in exceptional cases. And there are dealers who are really committed and very active in providing advice. Feel free to ask us, we have a sensible solution for everything.   

Who can and may use DEKOZELL?

Basically, any painter. Our systems have been developed from the outset to prioritise safety and ease of application. DEKOZELL FLEXOPANEL is as simple as wallpapering. DEKOZELL DISTANCE-EASY is like hanging with a normal plasterboard ceiling. Any drywall installer can do it. Added to this are extremely long open times for plaster application, sandability and the possibility of making invisible repairs. Add to this our step-by-step work instructions and intensive site support with short video calls for each work step: DEKOZELL creates completely smooth acoustic ceilings with a net and double bottom. 

Does DEKOZELL pay off for me?

Absolutely. Renovation and invisible repairs are the key. Damage to the ceiling? Forgotten emergency lighting? Dirt? No problem? Instead of tearing everything down again, a DEKOZELL ceiling can also be partially repaired invisibly. If it’s done right, you won’t be able to find a repair even in the middle of the surface in the color white. Craftsmen can get started directly on the construction site without extensive training.  
Technically speaking, one man alone can coat any size of surface. A break can be taken at any time in the middle of the surface, even overnight. Instead of a complex surface scaffold, a normal rolling scaffold is sufficient. This means that every trade business can open up a new and lucrative area of business. Architects simply attach the DEKOZELL acoustic plaster system to the normal painting tender. Exciting? Find out more here

Why is invisible repairability so important?

The absolutely invisible repairability of the smooth white final surface is your life insurance in the project. If dust deposits appear over the years around ventilation outlets, for example, we simply polish them away. Do you know of any other manufacturer who can do this? But even during the construction phase, it’s almost certain that someone will damage something: a scaffolding pole or a ladder will hit the ceiling, a corner of the cupboard will be knocked into the ceiling when installing the built-in cupboards – or the ladder will tip over when installing the lighting: fortunately, the other hand can still just “grab” the ceiling – but unfortunately there was aluminium dust from the ladder on the hand. Nobody wants these souvenirs. 

What makes DEKOZELL so unique?

We have completely rethought acoustic plaster. Most other manufacturers’ acoustic plasters are mineral-based. However, a mineral is actually an airtight filler. Only through special processing can a mineral filler be used to create a plaster surface that is ultimately also permeable to air. This explains the susceptibility to defects of standard mineral acoustic plasters, which use airtight mineral particles as a filler. We use natural fibres as a filler instead of mineral particles. As renewable raw materials, plant fibres such as cellulose and cotton are not only more ecological – they are also highly permeable to air.  
So, we have a filler that is already naturally permeable to air. And therein lies the secret. We disperse this filler for the plaster with approx. 80% water. The water evaporates and leaves behind air-permeable micropores in our already air-permeable filler. With classic mineral acoustic plasters, the micropores have to be created using special tactics during processing–and this means that errors are already pre-programmed. Our completely different technological approach is the reason for the ingenious workability and repairability of our acoustic plasters. And we have the patent for the use of natural fibres as a filler in acoustic plasters. 

Does DEKOZELL have even more in store?

We “only” make seamless acoustic plaster systems. But we do it well and with enthusiasm! For us, an acoustic plaster system is not just something that we have to have in our portfolio in case someone doesn’t want to see any holes in the perforated panel. Or that someone who usually buys thermal insulation happens to ask for. Acoustic plaster systems are our life. Put us to the test. 


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