Noise-control retrofit measures for walls or ceilings (drywall construction)

Many people will know the problem: After having bought a property you realize that the noise insulation in the building leaves a lot to be desired. This can happen with commercial properties as well as with residential buildings. But here too, retrofit sound insulation measures are a good option: All that is needed are our soniflex products and some manual skill to create an acoustically effective curtain wall (plasterboard) for walls and/or ceilings.

For sound insulation in drywall constructions we specifically recommend the following products:

soni COMPOSITE: This is a high-quality combination product made from our soni EVA synthetic heavy layer and an acoustic foam layer that is laminated with a decorative felt surface. These materials complement each other perfectly in acoustic terms and ensure that the product provides both a sound-absorbing and sound-insulating effect, making it the perfect sound insulation for drywall-type curtain walls.

soni 491 STL: This acoustically effective noise-control panel consists of a PUR foam in combination with a heavy layer. Its outstanding sound absorption values and excellent sound insulation efficiency make it the ideal product for retrofit noise-control measures on the walls or ceilings of all kinds of buildings, ensuring a significant reduction in noise. soni 491 STL can be used for so-called cavity damping, which means that it is mounted in the empty space behind a curtain wall. Typical applications for soni 491 STL are retrofit measures for the acoustic insulation of walls, partition walls or ceilings.

Advantages of our soni products for retrofit sound insulation measures

The different soniflex products recommended for drywall-type retrofit measures for the effective sound insulation of walls and ceilings score with excellent sound insulation values and outstanding sound absorption capacity. In addition to significant noise reduction and effective sound insulation, our materials installed on walls and/or ceiling will also provide thermal insulation and hence considerable energy saving benefits. Thanks to their outstanding quality, our soni COMPOSITE and soni 491 STL sound insulation panels are not only particularly robust, but also offer high ageing stability.

Sound insulation in drywall constructions – special tips for perfect outcomes

For the retrofit sound insulation of a dividing wall between apartments or neighboring terraced houses, we recommend the construction of a curtain wall behind which
soni 491 STL inserted. Our soni 491 STL sound insulation panel is a highly effective sound insulation product combining a bitumen heavy layer with a PUR foam that is additionally protected by a micro-perforated film.

For acoustic decoupling and to prevent sound bridges, we suggest applying our soni NBR sealing tape to the slats of the curtain wall.

As an alternative, you can use our noise-control products soni COMPOSITE , a high-quality acoustic foam with very good sound absorption and sound insulation efficiency.

Key features of soni 491 STL and soni COMPOSITE:

Excellent sound insulation values
Good sound absorption capacity
Additional energy-saving thermal insulation effect when used as wall or ceiling liner
High ageing stability
Free of mineral fibers, physiologically safe

Do you have specific questions about sound insulation measures for walls and ceilings or would you like to find out more about our products? We will be happy to provide you with expert advice and practical assistance.

Section of a PUR foam panel with black foil surface

soni 491 STL

soni 491 STL – Sound insulation board with heavy foil for effective wall and ceiling insulation Combined sound insulation and sound absorption in one product Our soni 491 STL sound insulation board is a highly effective PUR foam-based sound insulation product that is additionally combined with a heavy bitumen foil. The acoustic foam with sound-permeable foil ensures optimum sound absorption, while the bitumen layer effectively insulates and blocks sound. This intelligent combination of materials combines both sound insulation and sound absorption properties in a single product – ideal for anyone who wants to effectively reduce noise and create a quieter environment. Areas of application – versatile, efficient and reliable soni 491 STL is used wherever noise and sound transmission needs to be reduced – for example: ✔ Wall insulation between neighbouring flats ✔ Partition walls or ceilings in apartment buildings ✔ Technical rooms, machine rooms or workshops ✔ Cellars, garages and house walls The sound insulation board is ideal for retrofitting existing walls or ceilings with sound insulation – for example, by constructing a facing shell or cladding partition walls. Tip for constructing a facing shell: A facing shell is a very effective way of significantly improving wall insulation between neighbouring properties. Here's how to do it: 1. Attach battens: Attach 30 mm or 50 mm thick wooden battens to the wall. Use our soni NBR sealing tape to insert an elastic layer between the wall and the battens. This prevents sound bridges. 2. Insert sound insulation boards: Fill the gaps with soni 491 STL to achieve both sound insulation and sound absorption. 3. Attach cladding: Screw plasterboard or chipboard onto the battens. 4. Decoupling & joint sealing: Separate the construction from the floor, ceiling and adjacent walls with a small gap and seal the joints with acrylate for maximum insulation performance. Tip: In our experience report ‘Neighbourhood / facing shell’, you will find a practical example of how soni 491 STL can significantly improve the sound insulation of a wall. Alternative with visible surface: soni COMPOSITE If plasterboard cladding is too costly for you, we recommend our soni COMPOSITE as an alternative. This material combines sound insulation and sound absorption like soni 491 STL, but has a decorative felt surface in various colours – perfect for visible areas. Advantages of soni 491 STL at a glance ✔ Combined sound and heat insulation ✔ Heavy bitumen foil for high sound insulation ✔ PUR foam for strong sound absorption ✔ Wipeable, micro-perforated surface ✔ Self-adhesive and easy to process ✔ Effective noise reduction between neighbouring flats ✔ Ideal for facing shells, wall insulation, ceiling cladding ✔ Easy installation with a cutter knife and adhesive surface

Content: 0.5 m² (€39.80* / 1 m²)

€19.90*

Section of a sound insulation panel for sound transmission insulation with black felt surface

soni COMPOSITE

Color: black | Thickness: 32 mm

Order your soundproofing panel from soniflex soni COMPOSITE is a combination product made from our synthetic soni EVA heavy layer and an acoustic foam laminated with a decorative felt layer. This ideal combination ensures a twofold noise-control effect: sound absorption plus sound insulation – for especially high overall effectiveness in reducing the noise level. Applications for soni COMPOSITE soni COMPOSITE is particularly suitable for sound-transmission insulation. Mounted on the wall towards the neighbor’s apartment or behind a so-called curtail wall, for instance, our two-layer acoustic product achieves a noticeable noise reduction. For individual design options, you have the choice of various felt colors. Using a carpet knife, you can cut soni COMPOSITE to the required size and shape. The self-adhesive equipment of the rear face serves primarily as an installation aid.

Content: 0.5 m² (€65.80* / 1 m²)

€32.90*

Standing roll of black sealing tape soni NBR

soni NBR sealing tape

Order your sealing tape from soniflex Our sealing tape is one of various products that can be used for sealing off specific areas or decoupling different elements from each other: an ideal and easy to use solution! soni NBR sealing tape is a closed-cell sealing material produced on the basis of NBR. Sealing tape from soniflex offers you a high level of safety, reliability and quality that you can rely on! Properties of soni NBR sealing tape The self-adhesive sealing tape is made of a closed-cell material and scores with a range of specific properties that make it particularly versatile to use. This sealing tape can withstand temperatures from -40 to +80 degrees and also offers a high level of safety and reliability. Thanks to its self-adhesive equipment, the application of soni NBR sealing tape is quick and easy. The high adhesive strength ensures a secure and reliable application. The sealing tape comes in 40 mm wide rolls and can be cut to the desired length with the appropriate tool. Each roll contains five meters of tape. The use of soni NBR sealing tape A typical application of soni NBR is in the construction of a curtain wall, where the tape is used to acoustically decouple the wooden lathing. As our product is suitable for contact with oils, e.g. engine oil, our sealing and decoupling tape has also proven its effectiveness and practical use in many technical areas, for instance in vehicles, machines, housings, hoods and other areas for many years now. What is more, our soni NBR is extremely resistant to deformation and wear, which makes it much more durable than other products in this field. The self-adhesive rear face makes installation fast and easy. Do you have any questions about our soni NBR sealing tape or other products from our soniflex shop? If so, please get in touch and we will be happy to help you.

Content: 5 m (€1.58* / 1 m)

€7.90*

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Installation

On request, nearly all our products can be delivered with self-adhesive rear faces, enabling easy, clean and time-saving installation – perfect for retrofit applications in rooms that are already in use.

Noise control

Thanks to their open-cell structure, our noise protection materials absorb sound waves and effectively attenuate bothering noise. A satisfactory result can already be achieved by lining 30 to 50 % of the ceiling and wall surfaces.

Fire protection

Many of our noise-control products are classified as flame-retardant according to DIN 4102 or DIN EN 13501. Please contact your local authorities in advance for information about the required fire protection class.