Architecture & Planning

Acoustic spray is an acoustic absorber made of porous cellulose-based material that is applied seamlessly to ceilings and walls. The open-pored structure absorbs sound waves and reduces their reflection in the room.

Since the ceiling is usually the largest contiguous surface, it acts as a central sound absorber. This shortens the reverberation time, reduces the noise level, and improves the room acoustics in the long term.

The acoustic spray is highly versatile, seamlessly integrates into any design, and provides a continuous, smooth, and aesthetic surface with exceptional acoustic performance.

Unlike acoustic panels or ceiling baffles, it preserves the architecture and design freedom while offering superior sound absorption. This is how we provide a design-oriented acoustic absorber solution.

Another point: Our acoustic plaster is very sustainable. It's made from cellulose.

Acoustic spray plaster is versatile and suitable for spaces where a pleasant sound atmosphere is important. These include offices, restaurants, schools, hotels, supermarkets, healthcare centers, living spaces, museums, event halls, and so on.

It's especially beneficial in large, open, or reverberant spaces since it integrates discreetly and noticeably improves the room acoustics. Even in smaller rooms, acoustic spray calms the atmosphere and creates a pleasant spatial feel. Check it out for yourself with a look at our references.

Since acoustic spray is cost-effective and environmentally friendly, it is often used in warehouses, workshops and garages.

Acoustic spray is suitable for both new buildings and renovations. It can be applied to concrete, plaster, wood, or metal substrates and adapts to even complex geometries.

Ventilation pipes, cable carriers, or exhaust air boxes can be acoustically integrated, while lights, fire alarms, or shadow gaps remain precisely recessed. This creates seamless acoustic ceilings without compromising on design.

Depending on the acoustic requirements, the structure is only a few millimeters thick. Effective improvements in room acoustics can be achieved with a thickness of just 10 mm.

With a low weight of approximately 1.3 to 1.8 kg/m² per 10 mm, the static load remains minimal. No ceiling suspension is required.

We can achieve surfaces in five different textures, from 'structureless, very smooth finish' with our Acoplaster F to 'coarse-grained spray texture' with our Acospray DC3.

We offer twelve standard colors: White, Cool Gray, Concrete Gray, Anthracite, Black, Terracotta, Denim Blue, Olive Green, and the four special color blends from the Green Line product range. You are welcome to order samples of these colors and textures.

We can produce your individual color in RAL or NCS shades by adding water-soluble pigments to the adhesive. We achieve special effects by additionally spraying on acoustic paint. With careful processing, the acoustic values are retained.

For international corporations and larger projects, we're happy to produce the cellulose fibers in a chosen, exclusive color.

Sound primarily reflects off large, hard surfaces. In most rooms, the largest contiguous and smooth surface is the ceiling. A sound absorber on the ceiling is therefore particularly effective in physical terms.

Compared to acoustic panels, ceiling sails, or soundproof curtains, our acoustic spray solution remains flat, inconspicuous, and architecturally integrated. This reduces room reverberation without dominating the design.

Yes, acoustic spray plaster can be planned and applied even for existing or planned pendant lights, spotlights, ventilation pipes, cable ducts, motion sensors, WLAN devices, air conditioning systems, etc.

• Option: Overspraying: Acoustic spray plaster can be applied to all ceiling and wall surfaces, even if technical installations are present. Thanks to its seamless application, it adapts to the existing conditions. We often apply the spray plaster directly onto installations like cable trays and ventilation ducts. This further enhances acoustic absorption, and the visual effect is often appreciated.

• Option: Integration: Any object, be it lights, ventilation ducts, or air conditioning units, can remain accessible. In this case, we protect the objects, and the acoustic spray is carefully applied around them. With a few simple steps, we ensure a clean finish. For spotlights, motion detectors, etc., we create spacers using a 3D printer to embed them flush with the spray plaster surface.

We're happy to find the optimal solution with you for how acoustic spray plaster can be used in your project.

We'll guide your project from planning to execution:

• Planning: First, we clarify the acoustic requirements and design preferences. We'll help you choose the right material type, texture, and color. By briefly inspecting the spaces, we ensure all interfaces are clear and there are no surprises.

• Preparation: The substrate must be load-bearing, clean, and dry. Depending on its condition, a primer or bonding agent is applied to ensure optimal adhesion. We carefully protect all walls and floors with a waterproof covering.

• Implementation: The plaster is applied in multiple layers using a spray machine. The layer thickness varies depending on the desired sound absorption and surface appearance. This is followed by controlled drying.

• Completion: We check all surfaces and joints. If you'd like, we can also carry out an acoustic measurement. After all, we're all about excellent room acoustics combined with appealing aesthetics.

Our on-site work is usually pretty quick. Thanks to thorough preparation, our extensive experience, and our team and warehouse right here in Switzerland, we typically wrap up our projects within just a few days.

And yes, even after the project is done, we're still right here for you if any adjustments or improvements are needed.

Ultimately, what truly leads to an outstanding result is always a combination of great communication, solid preparation, quality workmanship, top-notch products, and local presence.

We promise: Our spray plaster provides the best acoustic improvement for every franc spent.

We'd be happy to provide you with a quote.

Audibility describes how well speech can be understood in a room. The controlled reverberation time in relevant frequency ranges is decisive for this.

In Switzerland, SIA Standard 181/1 defines clear requirements for room acoustics. In Austria, OIB Guideline 5 specifies the relevant framework conditions.

Standard-compliant planning—as is possible with Akustikspritz—ensures that people with increased speech intelligibility requirements are also taken into account.

Large rooms with high ceilings often produce long reverberations. In such cases, large-scale acoustic insulation on the ceiling is particularly effective.

With layer thicknesses of up to 35 mm, the acoustic spray achieves a sound absorption coefficient of αw = 1.00. This allows lecture halls, libraries, museums, or classrooms to be optimized in a targeted manner—without visually dominant fixtures.

Yes. The material is classified as RF2 / B–s1, d0, flame-retardant, low-smoke, and non-dripping.

Our Acospray products DC1, DC2, DC2+, and DC3 contain borate salts to guarantee this high classification and produce less smoke.
The product Acolaster F is a beard-free spray plaster variant and therefore only achieves the fire protection classification B-s2, d0.

Our Acospray products are certified according to ASTM standard C1338-19 and classified as "microbiologically resistant, compliant," making them resistant to mold and fungal growth.

Thanks to its high adhesive strength and elasticity, the composite remains stable and crack-free even with slight structural movements.

Our product is Cradle2Cradle Certified® Bronze and has been awarded the Ecobau Base certificate. The Green Line is even made from 100% post-consumer recycled materials such as paper.

This improves room acoustics while also pursuing a sustainable material concept.