Table of contents:

The right footfall sound insulation for every floor covering
The right footfall sound insulation for every floor covering

Video: The right footfall sound insulation for every floor covering

Отличия серверных жестких дисков от десктопных
Video: Ultimate Floor Soundproofing 2023, February
Anonim

Trampling from the upper floor, which is perceived as impact noise, is an annoying topic for many tenants. In existing houses, you can also install footfall sound insulation with a few tricks.

Table of contents Table of contents The right impact sound insulation for every floor covering

  • What is impact sound?
  • Measure impact sound level
  • Impact sound insulation in new buildings
  • The right material
  • The right footfall sound insulation for different floor coverings
  • Avoid sound bridges
  • An overview of the different materials

Table of contents Table of contents The right impact sound insulation for every floor covering

  • What is impact sound?
  • Measure impact sound level
  • Impact sound insulation in new buildings
  • The right material
  • The right footfall sound insulation for different floor coverings
  • Avoid sound bridges
  • An overview of the different materials

Impact sound can become a burden in the long run, because the resulting noise level should not be underestimated. If you move into a new building, you have the option of installing impact sound insulation right from the start. But you don't have to despair even in old buildings with several rental apartments. Here too there are ways to put an end to the noise.

What is impact sound?

Impact sound is the sound that is caused by movement on the floor. But not only walking creates noise, washing machines and other household appliances also vibrate the floor, which are passed on by components in the house and arrive as sound on the lower floors.

Impact sound propagates in the form of waves. If they make the air vibrate, we speak of airborne sound - our hearing perceives every sound as airborne sound. Structure-borne noise vibrates solid materials and transmits them over the surface as airborne sound. If the structure-borne noise arises from walking on a staircase or floor, one speaks of impact sound - the impact sound level measures its intensity.

Measure impact sound level

The impact sound level determines how loud noises penetrate the ceiling and arrive in the room below. Everyone has their own individual feeling for volume. In order to be able to compare stair or ceiling constructions with each other, the penetrating impact sound level is measured under standardized conditions. It indicates in decibels (dB) how much sound penetrates a reception room with an absorption area of ​​ten square meters. The test sound is generated by a hammer mechanism that generates 16 individual frequencies between 100 and 3150 heart (Hz). The frequencies are each one third apart, one also speaks of third filter analysis. A kind of mean value is calculated from these 16 individual values ​​- the evaluated standard impact sound level L n, w.

Sound not only penetrates through the ceiling, but also gets down through secondary paths, for example through adjacent components. L n, w evaluates the standard impact sound level without taking into account the structure-borne noise that is transmitted via the flanks of the stairs or ceiling - this value results on the sound test bench. The construction value indicates the impact sound level that is transmitted via the built-in staircase or ceiling and its flanks, the measurement value is marked with an apostrophe: L 'n, w. The lower the value, the better the impact sound insulation.

Trittschall
Trittschall

The easiest way to plan for impact sound insulation in the floor of new buildings. But insulation layers such as floating screed or resilient floor coverings can also be retrofitted.

Photo: Galderma Labartorium GmbH / Locreyl

Impact sound insulation in new buildings

If you have the option of integrating an impact sound into the floor from the start, you should definitely do so. Most of the time, footfall noise in new buildings is counteracted in the floor construction. For this purpose, a layer of foam plastics or mineral fibers is introduced as a so-called "floating sub-floor". This must not have a hard connection to adjacent components in order to contain the impact sound or to make it disappear entirely.

Think carefully about where in-house sound insulation would make sense and get different offers.

Tip: parquet, real wood or plank floors are particularly happy to pass on the noise. Impact sound insulation is essential here. But even with wooden stairs, insulation can reduce the noise level. An insulating layer is usually sufficient here.

The right material

If you want to equip your floor with impact sound insulation, you are faced with a multitude of different materials with different properties. As a guideline, the value for the impact sound reduction (IS) in decibels is used on the one hand, and the walking sound reduction (RWS) in percent on the other. Values ​​of less than ten to over 30 percent are common for the latter. With impact sound insulation, the value should be around 20 decibels or higher.

Furthermore, you should also pay attention to whether the selected material is heat-insulating. It is best to ensure that the WDW value per m2 K / W is as high as possible.

Good to know: 0.1 is considered a high value, values ​​of 0.0 have no use.

There are usually four different materials that are suitable for impact sound insulation:

Foam / plastic

An inexpensive way to insulate the impact sound is PE foam or pure foam. PE foam (polyethylene foam) is available both with and without an integrated vapor barrier and can also be attached above an underfloor heating system. In principle, PE foam can be combined with all floor coverings. However, you should choose a thicker PE foam film for laminate than for a vinyl floor. Expect costs of around one to ten euros per square meter.

A more effective variant is insulation boards made of polystyrene foam. However, you should not combine this material with underfloor heating. The prices for this are around three euros per square meter.

Corrugated cardboard

Corrugated cardboard is also inexpensive to buy, but has no heat-insulating properties - this does not necessarily have to be a disadvantage, because this material can be easily combined with underfloor heating. You should not lay corrugated cardboard under screeds as the material can only withstand pressure to a limited extent. Then choose hard foam sheets or mineral wool.

cork

If you would like to choose an ecologically harmless material, cork is the right choice. It is obtained from the renewable bark of the cork oak and is recyclable. You can choose between cork boards or roller cork. However, panels have significantly higher thermal insulation so that they cannot always be laid over underfloor heating. Impact sound insulation made of cork is available from around three euros.

Wood fiber

Another natural material is wood fiber boards. For this purpose, debarked residual wood is ground into fine wood fibers and pressed into plate form. The panels impress with optimal sound insulation and store heat particularly well. They also have the advantage that they can regulate moisture. Wood fiber boards are available from around 2.50 euros per square meter.

The right footfall sound insulation for different floor coverings

Hard floor coverings such as tiles, parquet, vinyl or laminate in particular transmit sound and are therefore suitable for impact sound insulation.

Good to know: Insulation is also required under screed. However, please note that this is permanently installed and therefore cannot be easily replaced or corrected later. Read more about the individual floor coverings below:

Underfloor heating

If there is underfloor heating under the parquet or laminate, you must in any case take into account the thermal resistance of the entire floor structure. So add the thermal resistance of the floor covering and the insulation. This should not exceed 0.15 m2 K / W. For example, insulation made of PE foam is suitable. If you are not sure, ask a specialist who can help you select and buy the right material.

Tiles

If the screed has already been laid floating, then impact sound insulation under tiles is not absolutely necessary. If you still want to insulate, you can choose special tile insulation boards or foils.

Vinyl floor

Vinyl floors are softer than, for example, laminate or parquet and therefore do not transmit impact sound as strongly - thin insulation is sufficient here.

Screed

Impact sound insulation under screed is extremely important and must be applied with care. Make sure that the screed is laid floating and does not touch the bare ceiling or walls at any point, otherwise the kick protection cannot be guaranteed.

The impact sound insulation is always installed under the screed and must be pressure-resistant under all circumstances so that it cannot deform.

Carpeting

Carpeting usually dampens noise. If you still want impact sound insulation, this should be fixed. Loose insulation makes waves over time.

Parquet or laminate

Almost any material is suitable for parquet, provided there is no underfloor heating. Please note, however, that depending on the thickness of the floor, the insulation material must also be thicker. You have the option of using either loose or firmly laminated insulation underlays. A firmly connected impact sound insulation has the advantage that air bridges and cavities are avoided. For loose insulation underlays, the best choice is corrugated cardboard or foam, which, however, guarantee reduced thermal insulation. Also note that if there is a risk of moisture, a vapor barrier must first be installed under the floor covering before the impact sound insulation can be installed between the sub-floor and the floor covering.

Avoid sound bridges

It is not just the floor in your home that can transmit impact sound. In old buildings, walls, shafts or pipes can also form sound bridges. In particular, heating pipes that run through the floor ceilings and directly touch the floor must be separated from the flooring.

But pieces of furniture that are screwed directly to the wall can also bridge the sound. In this case, rubber mats between the wall and the furniture ensure decoupling. In the case of a ceiling made of wooden beams, the planks should also not be screwed directly to the beams.

An overview of the different materials

Insulation material

PE foam

Polystyrene

cork

Wood fiber

Flooring

Parquet, laminate, Vinyl, design floors

Parquet, laminate

Parquet, laminate

Parquet, laminate

Impact sound reduction

16-20 dB

20 dB

17 dB

19 dB

Walking sound reduction

1-30%

15%

3%

3%

shape

Roll goods

plates

Roll goods or

plates

plates

Thermal resistance

0.01-0.063 m2 K / W

0.23 m2 K / W

0.042 m2 K / W

0.11 m2 K / W

Suitable for

Underfloor heating?

Yes

No

Yes

No

Recyclable?

No

No

Yes

Yes

costs

1-10 € / sqm

from € 2.79 / sqm

from € 3 / sqm

from € 2.50 / sqm

Lea Straub editors haus.de

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