Saints & Stars Gym


The futuristic and luxurious Saints & Stars gym in Amsterdam offers different high-intensity HIIT workouts and personal training sessions to help people get in shape.

To stop the transmission of unwanted noise and vibrations generated by the different gym activities toward the neighboring residential apartments, an “Extra Performance” CDM-GYM floating floor with dBooster® technology for added impact absorption and a 15mm CDM-GYMPACT impact absorption layer was installed by our local partner Delta-L.

Sound measurements have been carried out by Het GeluidBuro before and after the installation of the high-performance floating floor, showing that the requirements are met.

The “dry” build-up of the system with natural rubber pads, damping layers and impact insulation provides sufficient low-frequency noise isolation, without the need for a heavy concrete floating floor.

Because CDM-GYM-XP is lightweight and quick to install, it is the perfect solution for many existing buildings where the addition of a wet concrete floor is not possible or feasible. And because concrete curing times are no issue, Saints & Stars didn’t have to close for more than just a few days.


K1 Knightsbridge


K1 Knightsbridge is a mixed-use development in Knightsbridge, London SW1.

The 340,000sq ft/31,600m2 project comprises high-end retail and office space, 35 residential units and a new rooftop restaurant in the Royal Borough of Kensington & Chelsea.

The development sits on the corner of Brompton Road and Sloane Street in Knightsbridge. Opposite to Mandarin Oriental and One Hyde Park and next to Harvey Nichols. It is directly adjacent to
the Picadilly Line underground train line.

To achieve acceptable structure-borne noise levels within the residential element of the project, 10Hz CDM-VHS bearings were specified on top of the first floor columns.

CDM designed and installed the entire bearing assembly including top and bottom steel plates, disproportionate collapse and fail-safe details.

Every bearing can be replaced using our patented ‘CDM-FBT‘ frozen bearing technology.


Four Seasons Hotel Philadelphia at Comcast Center


The newly completed Comcast Technology Center stands as one of the tallest building in the United States and is the tallest building outside of Manhattan or Chicago.

Four Seasons guestrooms occupy floors 48 to 60, perched high above center Philadelphia. The ballroom located on the fifth floor is directly above the impressive Comcast office lobby, housing Steven Spielberg’s immersive VR Universal Sphere.

Constrained by a previously defined floor-ceiling height for the ballroom, very little space was left for the acoustical consultant, Metropolitan Acoustics, to isolate the lobby below from the ballroom.

With a build-up less than 3-1/2” thick, CDM-QuietDECK, an ultra-low-profile floor isolation system was able to meet the required acoustical performance and height constraints. This lightweight and low-profile floating floor system offers durability and functions for a wide range of live loads – a perfect solution for this multi use reconfigurable space. Today, the Four Seasons Ballroom, is one of the key elements of the hotel and building complex.

Key Benefit of CDM’s Solution:

  • CDM provided this system as a complete “turnkey” solution, manufacturing, delivering, and acting as the installing subcontractor. Assuring the construction team, design team, and owner of the isolation performance.
  • CDM offers installation services in select States, giving you both peace and quiet, and peace of mind.


Centr’Al Cultural & Sports Center


With the construction of Centr’Al, a new cultural & sports centre, the redevelopment of Place Albert, just on the border between Forest and Saint-Gilles, is well underway. The new landmark building complex designed by B-architecten comprises two buildings separated from one another by a busy intersection. Protecting the building and its users from the loud traffic noise was the main challenge of the acoustical consultants of Bureau Defonseca.

The largest of the two buildings houses two large polyvalent rooms, situated on top of each other. Both rooms will be used to organize dance classes, parties and receptions. Since both rooms should be able to be used at the same time, without causing an acoustical problem, a high-performance floating floor system was installed over the lightweight structural floor.

For the construction of the base slab, no concrete was used, allowing for faster installation. The base slab is made of high-profiled steel decking spanning from one steel beam to another on top of which several layers of fibre cement and OSB boards are installed. In turn, the completely dry build-up served as a sufficiently rigid basis for our CDM-QuietDECK wet floating floor system.

CDM-QuietDECK consisting of a thin 5 cm concrete screed poured on profiled metal decking, resting on resilient battens with elastomer pads, guarantees optimal noise and vibration isolation. The extra high air void created by positioning the resilient battens on top of wooden beams significantly reduced the air stiffness, contributing to the noise isolation. The result, an efficient “mass-spring-mass” system that decouples and isolates the rooms.


Volkswagen Autoeuropa


Autoeuropa is an automotive assembly plant owned by Volkswagen, located in the city of Palmela, near Lisbon, Portugal. Built in 1991, it began operations in 1995. VW Autoeuropa produces over 860 cars per day, making it one of the largest car plants in Europe.

A special CDM-MACHINE-FLOAT spring solution with a natural frequency of 4Hz was designed to support a 350 mm thick reinforced concrete floating slab, embedded in the floor, which in turn supports a 135 ton CNC precision milling machine. The isolation system was designed to prevent precision errors by the milling machine caused by the close proximity of a hydraulic press. In addition, a custom made lateral buffer in the floating concrete perimeter guarantees low dynamic stiffness and high deflections in the isolated concrete slab.


Santander Totta


Santander Group is a Spanish investment bank active in Portugal since 1988, with their headquarters in Praça de Espanha, Lisbon.

The original main building designed by Frederico Valsassina, received an extension in 2015. The bank’s new operational building occupies a total area of 9,600 m² and houses over 2,200 people. For the construction of the additional buildings, the sloped terrain had to be overcome. Three semi-buried and internally connected building blocks were constructed around the existing building. The 22.000 m² construction site houses an underground parking lot, an auditorium, gym and office spaces.

A CDM-MONT jack-up floating floor solution with a natural frequency of 8Hz, designed to support a 100 mm thick reinforced concrete floating floor, was installed in the gym situated on the
-2nd floor between the office levels, to shield the surrounding office spaces from unwanted noise and vibration. Reinforced steel boxes cast into concrete and jacked-up after the concrete has
cured, effectively decouple the entire floor surface of the rest of the building.


Atlântico Blue Studios


Atlântico Blue Studios, a state-of-the-art recording venue located just a few kilometers from Lisbon, reflects Portugal’s rich nautical history with ocean waves referenced throughout its design and construction. The Atlântico Blue Studios positions itself as a multicultural space that to brings together musical leads from the many shores of the Atlantic Ocean.

The studio complex is the largest of its kind in Europe, comprising a large hall suitable for orchestras, a smaller studio for bands and a mastering studio, as well as several production studios. Equipped for all types of audio recording, mixing and mastering, boasting the latest 5.1 surround sound systems, the Atlantico Blue Studios are the perfect venue to complete a project from start to finish. From start to finish.

To prevent noise pollution from interfering with the recording work in the different studios, high-performance CDM-WALL-STRIPS and CDM-WH wall fix isolators were used to decouple the inner walls of the building complex. Resilient CDM-WALL-STRIPS placed around all single cement/sand wall blocks in combination with the CDM-WALL-FIX resilient stability connections guarantee optimum vibration decoupling. A specially designed CDM-FLOAT system was installed in the floor to guarantee optimum vibration control between the different studio spaces.


King’s Cross Bridge


King’s Cross Bridge is a new commercial and retail development which sits directly on the Circle and District Line tunnels right next to King’s Cross Station. The level of noise and vibration from the underground trains meant that the existing building was not viable for any modern occupational use.

RBA Acoustics specified that the building must be isolated on the best practically available building isolation and CDM-UK was chosen to supply and install CDM-CHR-BOX pre-compressed springs.

The CDM-CHR-BOX bearings were adapted to have top baseplates that matched exactly the column baseplates and bottom plates that allowed them to be fixed down to the substrate. Each CDM-CHR-BOX was levelled to make the top plate within a tolerance of 2 mm and this made the installation of the steel frame exceptionally fast.

The completed building has achieved the required noise and vibration targets.


Basic-Fit Boulevard de Strasbourg


Boulevard de Strasbourg is a major thoroughfare, located in the 10th arrondissement of Paris. Basic-Fit Boulevard de Strasbourg is located on the ground floor of a multipurpose building that also houses apartments and offices. Adjacent are shops and a restaurant (structurally connected).

Basic-Fit Boulevard de Strasbourg is a gym with different workout areas: cardio area, functional zone, spinning room, strength zone and free weight lifting areas. Most of these areas are isolated from one another and are located in different rooms. Because of that, it was easier to understand the main noise concerns and define the noise levels that are generated in each space. Accordingly, we were able to propose the right solution for each zone.

From October 14 to November 1, Basic-Fit Boulevard de Strasbourg was closed for maintenance works. During this period, it was possible to install two CDM-GYM solutions:

  • 106 m² of CDM-GYM-XP with a high performance impact layer (CDM-GYMPACT45) and dBooster® technology for the free weight lifting area, improving the noise levels in surrounding
    rooms as well as making the performance of the floating floor less dependent on the impact energy;
  • 40 m² of CDM-GYM-SP was installed in the cardio area, bringing the desired acoustical performance with a floor system with low deformation, compatible with comfort of use and live load conditions (heavy equipment storage with their load concentrated on its feet).

Fitness enthusiasts are now able to exercise to their heart’s content without having to worry that their activities are disturbing the neighbors. The intervention was quick and easy, allowing Basic-Fit Boulevard de Strasbourg to reopen in only a couple of days. The installed floating floors did not add too much weight or height and the client was able to reuse their rubber tiles as finishing layer.


Galleria Office Building


The works on the shuttle parking of the station of Aalst and its surroundings are nearing completion. The site will include a parking building, bicycle sheds, a new Denderplein, housing and a ‘Galleria’ building with offices for SNCB staff.

The station and its surroundings will become a modern and accessible hub for trains, buses, cars, bicycles and pedestrians. The city of Aalst, the SNCB Group and De Lijn are jointly investing 40 million euros in the embellishment of the Aalst railway station district.

At the back of the train station, along the railway embankment, work is in full swing on a new parking building with a covered bicycle shed for some 800 two-wheelers. Between the existing and new underpass to the railway platforms will be the so-called ‘Galleria building’ with shops on the ground floor and above it offices and technical classrooms of the SNCB. Both the shuttle car park and the Galleria office building should be completed by the end of next year.

In order to limit the propagation of ground-borne noise and vibrations from the adjacent tracks to the new building, a CDM-RAFT solution was applied over the entire length of the 50 metre long and 6.5 metre high soil mix wall. After unrolling the rubber acoustic insulation mat from above, a wall in reinforced concrete was poured against it. By applying this extra damping layer, vibrations are not given free rein and the building and its occupants are protected against unwanted vibrations and the associated noise.