Noise insulation walls of an apartment or house – this is a common event to achieve comfort. In a noisy environment, as has been proven by scientists and doctors, human health deteriorates, he becomes irritable, nervous, there is chronic fatigue. Moreover, heart disease aggravated, and even airway ear drops.
Back in the Soviet guests were prescribed boundary permissible noise limits for residential and public buildings. And perform soundproofing rooms must still at the stage of construction builders home. But, unfortunately, not always and not all the rules are respected. Because owners often have to take care of your comfort and health.
From which to defend themselves?
Before determining how to protect against extraneous noise is needed to mark, on what exactly needs to be protected. Noise or sound insulation? Today these two concepts with a light hand building material dealers became one. Yet, returning to the roots, they can be divided. To understand the difference, we define what a noise and sound.
Sound – a sharp fluctuation of material particles. Soundproofing – quenching soundwaves surrounding objects (sound absorption) or its reflection, which prevents the penetration of sound in space. Indoors, you need to use absorbent material to a sound wave does not “walk” up and down the room, and inside or outside walls – sound-reflecting.
Noise – a disorderly, chaotic jumble of sounds, not just close and sharp, but also distant, deaf.
Noise isolation – protecting the premises from noise, or rather reduce the number of dB sounds that penetrate through the walls from other rooms or from the street. Even at a considerable distance from the sound source, as he enters the room noise. Because insulation walls requires all buildings and premises as the apartment in apartment buildings and private home. But the apartment is also needed for soundproofing ensure complete comfort to tenants.
Soundproofing materials for walls
Multilayer construction – one of the best ways to protect against noise. Why?
Each material in their own way and repels absorbs sound waves at the junctions of materials of different density dispersion of sound increases. This facilitates the rapid absorption and silencing waves. Such a system damping of sound waves is very effective, but the construction takes longer usable floor space than others. For example, 3-layer board (gypsum fiber, mineral or glass, drywall) with a thickness of 10 mm gives a reduction in noise by 13-15 dB.
Tyre noise reduction sandwich panels vary depending on a variety of factors: the thickness of the inner layer material layers, the total thickness of the panel. Besides these plates are inflammable, meaning they still combustible.
Another negative – weight design: one three-layer plate can weigh up to 20 kg. Because they can be used only when initially strong walls, designed for heavy loads.
Mineral wool is used more as a heater, but has excellent noise absorption properties. This material lost 90% of the incoming noise. Given that mineral wool have a thickness of 50 mm, it can be concluded that the insulation is great. But there are many problems with the use of cotton.
Do inside the building insulation mineral wool is not recommended, there are several reasons:
You can break the vapor barrier rooms, it has to shift the dew point inside, it concerns only those walls that overlook the street. Then the problems will become more fogging walls, mold, fungus, etc. Because before using rockwool indoors, you need to perform the calculations dew point.
Material much “eats” inner space.
For mounting frame is required in addition to create, and then cover the plate with solid material suitable for finishing.
Because if you can, then soundproofing walls using mineral wool perform better outside the premises. This will be the “three in one”: noise, vibration and heat insulation. For interior partitions mineral wool, perhaps one of the best options.
Drywall, but the level of noise suppression is small. Besides, it is rather the protection of outer space from the noise that is produced in the area. Because, if the walls are covered with plasterboard neighbors, noise from them will be less. But indoors this material reflects the percussive sound, and sounds in the room can be even more.
For high-rise apartment that decision may be optimal, though hope for complete isolation is not necessary. To do this, between the wall and plasterboard slabs lay a sound-absorbing material such as mineral wool. But then again there are the problems described above. Moreover, in high-rise building for tangible effect of noise reduction is necessary to isolate not only the walls, but the floor, ceiling, doors and windows.
Cork materials. Used for soundproofing walls of cork sheets. They reduce noise levels by 12 dB. These boards are used as a topcoat and, because they are pleasant to look at and touch. But to achieve the expected level of comfort seriously.
The reason is the same as in the case of plasterboard: Material does not absorb and reflect sound. Using plug, you isolate yourself from the neighbors, and not vice versa. If the sheathing stopper wall on two sides, the intended effect is achieved.
Expanded polystyrene and its “relatives” also sometimes be found in the list of materials for noise and soundproofing. They reflect the sound for that reason their efficiency is achieved only in the case of house exterior sheathing.
Indoors, apart from the problem of displacement dew point is added and the increase in sounds that are produced indoors. Unlike mineral wool, polystyrene is not recommended for interior walls, the same reason: a reflection of sound, rather than absorption.
Noise isolation, despite its apparent simplicity, the event difficult because you need to take into account the many nuances. And some of them can only be a specialist to determine using special equipment.
But to know the basic characteristics of the proposed materials for soundproofing needs at least to protect themselves from unscrupulous repairmen. It is also important to remember that quality insulation – a comprehensive protection of the whole room, not just the walls.