FAQ

The Mantobit multi-coupled panel is a complete mass-spring-mass system and has a soundproofing function, especially on very light brick walls. It is anchored with 3 screws on the upper part of the panel and glued with Bostik glue. It is recommended to use 2 more screws on the middle and lower part of the panel. The correct installation calls for the edges of the panels to be perfectly matched and sealed with ALLUMINATO AD TAPE.

The SUPREMA 3.5 multilayer technical membrane has multiple uses, starting from the walls up to the ceilings, especially light ones. The membrane provides excellent soundproofing performances as indicated in the certified solution with overall thickness of 8.0 cm (see our certified solution).

For these cases, our company offers a certified solution with a thickness of 3.5 cm that can improve the protection against airborne noise (voices, TV, radio, etc.) coming from neighbouring houses. In the event of different types of noises or if the existing wall is made of heavy and thick brickwork, it is better to use the certified solution with a thickness of 7.5 cm (see our certified solutions).

The presence of electrical systems, such as electrical boxes, can be a weak point and drastically reduce the benefits of the sound insulation covering, however, this problem can be remedied by covering the seat of each electrical box with the MANTOPHON PBX soundproofing membrane.

The MANTOPHON PBX multi-layered covering is often used on ceilings, especially light ones, and on vertical walls, also light ones, like brick partitions, because its high specific weight allows obtaining excellent insulation values with reduced thickness. This product, however, contributes little or not at all with applications behind a massive face (e.g. brick wall) with a weight “n” times greater and with fixing by means of rigid anchors. In fact, no improvements in soundproofing performance are obtained from this application because the increase in weight brought by MANTOPHON PBX is not very significant compared to that of the existing partition.

Based on experience acquired after many instrumental tests, installing the product only on one side of the wall results in greater benefits, at least in numerical terms, to the side opposite the covered wall where, in the presence of a double brick face (12+air+6 cm), the product was installed behind the much lighter face. If to this situation we also add an unfavourable ratio between the wall mass and lateral masses and an unbalanced flanking transmission, in rare cases, a different soundproofing performance is obtained analytically by inverting the sense of measurement.

According to our experience, the creation of a new drywall or wall must have insulation strips against the existing structure. In the presence of the certified solution with a thickness of less than 6.5 cm, the insulation is carried out by applying ROTOCELL AD adhesive strip along the entire perimeter of the new wall. For interventions with a thickness greater than 6.5 cm, on the other hand, a POLYPRILL eco-rubber strip must be applied to the base in order to support the new loads of the wall, while the usual ROTOCELL AD adhesive strip must be used on the rest of the perimeter. Insulation between the newly built elements and the existing structure is essential for proper execution.

The false ceiling made with vibration-damping brackets or with self-supporting structure are two systems that can be used in different situations: the use of a self-supporting structure is recommended with a span of less than 3 - 4 m (e.g. corridors, bathrooms), while the system with vibration-damping brackets must be used for larger spans (e.g. bedrooms, living rooms). The use of a self-supporting structure is much more effective, in the absence of lateral transmissions, as the existing floor is not impacted by the intervention.

Knowledge of the ceiling to be acoustically insulated is the fundamental starting point for developing a specific solution. Noise insulation, whether airborne or impact, will be better as the soundproofing characteristics of the ceiling decrease. With the same thickness, the false ceiling made of a massive structure (e.g. brick-concrete, reinforced concrete) can lead to lower performances compared to a light structure (e.g. beams and planks, Xlam).

Even if the acoustic false ceiling is lowered by means of protruding tie rods, it never loses its sound-insulating function. On the contrary, the air cavity created between the existing ceiling and the new ceiling improves the acoustic values. In addition to sound insulation products, the air blade allows complete disconnection between the new structure and the existing structures.

An acoustic false ceiling can be installed in two solutions on a wooden roof.
1- It is possible to intervene using a special damping system with a false ceiling between the beams, thus maintaining the acoustic bridge generated by the beams that allow the connection between the inside and outside.
2- The most effective low-thickness solution uses a structure inside the centre distances filled with an ecofibre mat coupled with a finishing sheet just below the wooden beams. This solution is better than the first as it completely eliminates the acoustic bridge coming from the wooden beams.

The POLYWALL BLS or NLS sound-absorbing panels can also be glued to the wall or soffit using acetic silicone or adhesives for plastic products. The gluing can be done in two ways: 1. Place the silicone on the four corners of the flat surface 2. Apply a bead of glue around the entire perimeter of the face at a distance of about 2 cm to simulate the suction effect and place an “X” shape in the middle. The second solution allows a safer and more effective gluing, and we recommend it. For greater safety, double-sided adhesive tape can also be applied to allow the sealant to dry without the panel moving.

The POLYWALL panel is made of white polyester fibre (BLS) or black polyester fibre (NLS), which contains tiny cavities that create traps for the wave that hits the panel. The panel has a smooth finish to provide greater compactness and greater sensitivity to contact. It has numerous laboratory certificates, including sound absorption, emission of volatile organic compounds (VOC), resistance to impact, mechanical resistance to baffles.

In the presence of footfall sound insulation, the pipes should not be laid and fixed directly to the floor as this would create an acoustic point between the pipe and floor. The most appropriate solution is to lay our MAX-CORE cement slab between the pipe and floor covering, allowing the pipes and fittings to be fixed in the traditional way. If the pipes or ducts have a small diameter, like those of electrical systems, cement mortar or PE adhesive strips can also be used.

A particularly important problem comes from the lack of or insufficient insulation of drainpipes and their connections, because if they are not properly insulated the flow of water in the pipes causes vibrations that propagate through the pipes along the walls and floors until they reach the external environment.

This makes it necessary to cover the straight sections of the pipes with the COVERSOUND BIT acoustic insulation specifically designed to cover drainpipes; while the ROTOCELL AD strip can be used in the connection points. The adaptability of this strip allows it to be used much more easily on site.

Moreover, it is fundamentally important to position the ROTOCELL strip between the edges of COVERSOUND BIT so that there is continuity between the various straight sections where the insulation will be positioned.