When you need soundproofing of foam block walls, the technology for its implementation

Soundproofing is essential for establishing a more peaceful and comfortable living or working environment. Although they offer insulation, foam block walls might not always be able to completely shut out noise from the outside or from adjacent rooms. By greatly reducing noise transmission, soundproofing technology can enhance overall acoustic comfort.

Multiple essential techniques are involved in soundproofing foam block walls. Adding more layers of sound-absorbing materials directly onto the walls, like acoustic panels or dense insulation, is one popular technique. By absorbing and dispersing sound waves, these materials aid in preventing sound waves from entering the interior spaces through the wall structure.

Using decoupling materials or resilient channels is another successful strategy. With these methods, an air gap is made between the freshly installed drywall or other finishing material and the wall that already exists. By severing the direct connection between the two surfaces, this airspace lessens the amount of vibration and sound waves that are transmitted.

The precise noise sources you’re attempting to reduce, the thickness and design of the foam block walls, and the required degree of sound reduction all play a role in selecting the best soundproofing technique. It’s critical to carefully consider these variables in order to choose the best soundproofing option for your unique circumstances.

Is it necessary to do noise protection and sound insulation??

Foam block was created from the ground up as a less expensive substitute for reinforced concrete slabs and brick walls.

Because of the foam structure, which has a large volume, the amount of components used during production decreased significantly, but the walls’ quality level remained essentially unchanged. Simultaneously, foam blocks went above and beyond what developers had anticipated.

In several significant performance parameters, the material performs better than conventional building materials:

• thermal protection;
• soundproofing;
• sound insulation.

The cellular structure of multiple air-filled pores in foam concrete blocks accounts for their noise-proof qualities by obstructing the propagation of sound waves.

In Russia, internal walls are required to meet a noise protection standard of no more than 43 DB. When a layer of plaster is applied, the noise threshold of a standard D600 brand foam block increases significantly by at least 4 DB from 48 DB in its pure form.

Installing inter-apartment walls made of D500 foam concrete that are 150 mm thick and plastered on both sides is sufficient to ensure the sanitary standard for sound protection of walls between apartments with a standard of 52 DB.

Consequences of absence

Additional installation of noise and sound-proofing layers will be necessary when using another lower modification of the blocks for the walls; otherwise, a very "noisy" apartment could endanger other people’s health.

Numerous studies conducted globally have determined that one of the primary factors contributing to people’s physical and psychological stress is noise. The latter has a direct correlation with a number of common health issues, including headaches, fatigue, irritability, and cardiovascular disease.

The following primary forms of protection are employed in homes and apartments to lessen noise levels and sound propagation:

• Soundproofing. Capable of suppressing mid- and high-frequency sound waves.
• Damping. Suppresses structural low-frequency sound.
• Sound-absorbing. Absorbs sound like a sponge absorbs water, thereby protecting the room from the echo effect.

Easy and affordable ways to increase the amount of sound that a foam concrete wall blocks out:

1. Plastering walls with special mixtures increases the noise protection index to 5 DB.
2. Application of special soundproofing systems.
3. Installation of fiberglass boards, mineral wool and drywall.

When to insulate from the outside and inside?

Although foam concrete can absorb excessive background noise, the choice of whether and how much insulation to use depends on the following factors:

1. foam block density;
2. thickness of the wall structure;
3. masonry mortar and the size of its layer;
4. location of the object in relation to increased sources of noise and sounds.

The developer must consider that a double wall structure is better than a single wall when selecting the type of soundproof wall.

The principle of acoustic decoupling is applied when constructing protective layers, removing inflexible connections between partitions. In order to be considered soundproof, walls must also be airtight, meaning that holes and cracks cannot exist.

Noise protection can be installed outside or on the outside of a load-bearing wall whose thickness is less than 300 to 400 mm; if the wall’s thickness is between 200 and 300 mm, it must be installed on both sides.

The most often used components for foam block wall-based noise and sound absorption systems are:

• “Acoustic-Butts” based on stone wool, absorbs up to 11 dB;
• plasterboard 10 mm – up to 35 dB;
• glued plywood – 19 dB;
• sandwich panels – 40 dB;
• plaster 12 mm – 4 dB.

For buildings to effectively reduce noise, it is important to understand the proper techniques when considering soundproofing foam block walls. In order to improve sound insulation in foam block structures, this article examines useful techniques and technological advancements. It covers all the necessary steps to create quieter and more comfortable living or working environments, from selecting the right materials to putting soundproofing solutions in place.

Correct wall pie

A 100 mm layer of mineral wool is thought to be the best option for protection when there is 300 mm of external sound insulation for walls; in this design, thermal and sound insulation will be used for house protection.

The following layers will make up the wall pie:

• supporting subsystem;
• sound insulator, mineral wool;
• windproof layer;
• waterproof layer;
• fastening system;
• exterior finishing material.

Sheathing for sound and noise insulation uses specific building materials, like:

1. acoustic mineral wool;
2. soundproof plasterboard;
3. flexible soundproof fastenings;
4. elastic membranes with high density;
5. elastic insulating tapes.

The 200 mm thick foam concrete walls in the house have soundproofing installed on both sides, both inside and outside the building, as per the pie above.

There are many efficient internal sound-dampening systems available in the retail network these days, such as the Vibrofix Protector Extra system, which can reduce noise levels by up to 11 dB.

What makes up its wall cake:

• Vibrofix fastening system;
• mineral wool with an acoustic effect, 20 mm;
• rack and guide profiles;
• soundproofing membrane;
• drywall 12.5 mm x 2;
• Vibrofix Norma – soundproofing tape.

Materials for work

Complex-action materials that can prevent heat loss and moisture intrusion into the house are typically used to block external sound. These materials are covered from above with decorative plaster or protective finishing plates.

The most widely used and reasonably priced materials for sound absorption are:

1. Classic basalt mineral wool with a sound-reducing and heat-insulating effect. The most accessible and inexpensive material, capable of completely making the house quiet. There is only one drawback – the high width of the protective layer.
2. Materials obtained from eucalyptus, bamboo or coconut processing. In many respects, functionality and durability, they are practically no worse than mineral wool, but at the same time they are environmentally friendly.
3. Cork mats are currently considered the best internal sound insulator, due to the fact that it effectively blocks sound even with a relatively small layer thickness. It is used as an interior finishing material for individual artwork. There is only one drawback – the high cost of both materials and finishing work.

Technology and step-by-step procedure

There are two ways to protect against noise in the home:

1. eliminate sources of noise;
2. establish barriers to its spread.

Two major methods are also used in soundproofing:

1. reducing the volume of vibrations of sound waves by increasing the massiveness and weight of the wall structure;
2. absorption of sound waves by multilayer porous building materials that scatter sound waves inside the layers.

Outside

Look for cracks and voids in the walls by carefully inspecting and tapping them before beginning any insulation work. The most common locations for them are corners, where the wall meets a floor slab or a partition. If any voids are discovered, they are filled in with cement or gypsum.

An insulator known as mineral wool is installed using suspended ventilated structures for an external load-bearing wall. The use of elastic spacers to secure the brackets and guide profiles is crucial.

A fully independent frame composed of a metal profile in the shape of a screen is used for mineral wool, filled with the material, at a specific distance from the wall, in order to achieve a high degree of noise protection.

Technology used to install the sound-absorbing system:

1. Cleaning the walls from dirt, repair work as necessary, and impregnation of the wall surface with a primer.
2. Laying waterproofing.
3. Installing the lathing.
4. Laying mineral wool.
5. Installing wind protection.
6. Installing fiberglass mesh.
7. Applying plaster.

From the inside

It is preferred that foam block partitions’ interior sound insulation offer protection above 70 dB. A functional TV’s typical sound will not be audible in another room at this volume.

Affordably priced technique for soundproofing utilizing acoustic mineral materials for base wall cladding:

1. Move away from the wall at the distance required by the project, make parallel markings of 2 lines, one on the floor and the other on the ceiling.
2. Drill holes along the designated lines every 1 m for dowels.
3. Glue polyethylene elastic tape or other foamed material to the guides of the frame structure with a width exceeding the total thickness of the insulation.
4. Mount metal profiles using special vibration washers.
5. The installation points of the rack profiles are fixed in increments of 600 mm, which corresponds to the width of the insulating mats and 1/2 the width of the drywall.
6. In cases where the finishing is planned to be done with tiles, the gaps are reduced to 400 mm.
7. Vertical lines are marked on the wall for the racks on which the attachment points of direct hangers are fixed, in increments of no more than 1.2 m.
8. Glue an elastic tape to the base of the suspension, which is secured to the wall.
9. Direct suspension and tapes are attached to the structure using special vibration-isolating fasteners.
10. Cut mats of acoustic mineral wool are placed in the profile cells.
11. Lubricate the surface with elastic sealant.
12. Cover the structure with an outer finishing layer.

Difficulties and errors

When it comes to noise and sound insulation systems for walls, the most frequent errors occur when the walls were first constructed without following modern building codes. For instance, when blocks are put on concrete mixtures rather than specific adhesives. Sound waves are well-transmitted through concrete.

All sources of elevated sound, such as windows and doors, must be eliminated in order for the protection system to function properly. It’s also important to pay attention to the roof, which can make noise during certain events, like rain. The room will be noisy if the ceilings are not covered with insulating boards.

Avoid using assembly adhesive when covering walls with protective mats. Not only is it impossible to reduce sound insulation in this situation, but oscillations in the system may also start to occur.

Since Penoplex and polystyrene foam cannot shield a home from outside noise, many experts advise against using them as sound insulation.

Cost of work

Ascertain the volume and cost of the required building materials before estimating the cost of installing a sound protection system.

Calculation of the quantity of construction materials needed to protect foam block walls from noise:

Wall measurements are as follows: S area = 13.75 m2, L length = 5.00 m, and H height = 2.75 m.

Plasterboard, a specialized material for sound protection, must be installed along with wall plastering in order to guarantee sound and noise protection for walls composed of foam blocks. In the Russian Federation, the average cost of labor will be between 700 and 1000 rubles per square meter.

It’s essential to soundproof foam block walls if you want to keep your home quiet. Using soundproofing technology can greatly improve your living environment, regardless of whether you live in a noisy neighborhood or just want to lessen the amount of sound that travels between rooms.

Foam block walls can be effectively soundproofed using a number of techniques. Using acoustic insulation and resilient channels is one common method. Resilient channels stop sound waves from passing through the building by forming a space between the drywall and the wall. Sound waves are further absorbed by acoustic insulation, like mineral wool or fiberglass batts, which lowers noise transmission.

Applying mass-loaded vinyl (MLV) directly to the foam block walls is an additional method. MLV is a flexible, dense material that gives the wall more mass and effectively blocks sound waves from entering the room. It can be put in as a layer between the foam blocks and the drywall or before the drywall is added.

Furthermore, using acoustic sealant to close any holes or fractures in the walls can greatly increase the effectiveness of soundproofing. Since sound can pass through even tiny gaps, complete sealing is crucial.

Consider speaking with an expert when organizing foam block wall soundproofing to make sure the techniques and supplies chosen are suitable for your particular circumstance. Since every house is different, professional guidance can help you get the best soundproofing outcomes.

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