Impact Sound Insulation - PAROC

Impact Sound Insulation

Building InsulationJanuary 2012

I M PA C T S O U N D I N S U L AT I O N

2

ContentsWorld of Steps ..................................... 3

Demands regarding sound in buildings ... 4

Why choose PAROC® Stone wool? ........ 6

Dimensioning, General ......................... 8

Concrete Floors .................................. 10

Wooden Floors .................................. 12

Solutions, Impact Sound ...................... 14

Comments to Solutions ........................ 16

Product Information ............................ 17

General Working Instructions ............... 18

PAROC® Energywise House™ With the Energywise House™ concept,

Paroc would like to give advice and

instructions about what you can do to

reduce the energy consumption when

building new houses or when renovating.

An energywise solution means that higher

requirements than those stipulated in the

building regulations are fulfilled, which

is a good investment for the future. So,

when you want to build energywise, think

PAROC® Energywise House™.

3


Concrete or wooden structureThe standards allow calculation of the results for a construction when the basic properties for the material are known, especially regarding monolithic fl oors made of concrete. Wooden fl oors are more complex and the sound insulation depends on the layers and the layer structure, the thickness and weight etc. Wooden fl oors have to be individually designed and probably also measured to get an accurate result.

Added demandsIn some countries the demands also includes an adoption term called the C-term. Demands and measurement results with the C-terms included are more fair when comparing constructions. It is however more diffi cult to make accurate measurements at low frequencies. Normally the C-term means that the construction gets a lower value of 0-3 dB for both airborne and for impact sound, but for constructions intended for high sound insulation the difference can be much larger.

RecommendationsThe idea of this brochure is to introduce solutions, with PAROC® Stone wool, that meet the local national requirements.

The values given includes a safety margin, due to the regulations, that are “normal” at a building site!

World of Steps

ComfortThe need of privacy and comfort in our homes becomes bigger and bigger due to the fact of the noisier atmosphere surrounding us.

PAROC® Stone wool is very useful in connection to this by making more sound reducing constructions. Stone wool is used in fl oors to reduce the impact or step sound from fl ats above. But may also be used in walls to reduce noise from your neighbour or from outside.

This brochure is about impact sound and how to make our living more comfortable by good fl oor solutions.

NeedsThe needs regarding impact sound insulation have increased during the last years. New machines and loud sound reproduction equipment have caused an increased need for constructions with high sound insulation. Modern machines are furthermore comparatively strong in the low frequency region, which means that low frequency noise issues in buildings is becoming more important.

RegulationsNormally the regulations are divided into classes where the basic demand easily can be upgraded by the use of a PAROC® Stone wool step sound board in the construction. The aim of this brochure is to inform about the connection between product choice and resulting sound insulation and to present how to design buildings according to the requirements.

The technical demands are all covered by the EN regulations, which mean that the requirements are referring to the same standards all over Europe. The science, building acoustics, as such is relatively new why the test methods and also demands were relatively harmonised also before the EN regulations.


4

Demands regarding sound in buildings

In the building regulations from “Boverket” (BBR) the following demands are set on dwellings:– Minimum airborne sound

insulation– Maximum impact noise level– Maximum noise level from

installations– Maximum reverberation time for

different rooms– Maximum outdoor and indoor

noise levels due to traffi c.

The demands are fulfi lled if; at least, the values for class C in the swedish standard SS 252 67 are reached, in some cases including the C-terms.The terms R´

w and L´

n,w and R´

w +

C50-3150

and Lń,w

+C50-3150

are defi ned in SS EN ISO 717. See Insulation Theory.

In the following a short overview of the demands in SS 252 67 is given.

Noise level from installations:DemandsNote that the limits are set for the total sum of installations.

24 h equivalent levelIn bedrooms LpA ≤ 30 dB LpC ≤ 50 dBIn living rooms LpA ≤ 30 dBIn kitchen LpA ≤ 35 dB

Sound with short durationIn bedrooms LpAFmax ≤ 35 dBIn living rooms LpAFmax ≤ 35 dBIn kitchen LpAFmax ≤ 40 dB

Traffi c noise level• Indoors:

The 24 h equivalent noise level in a dwelling shall not exceed 30 dBA. The maximum noise level in a bedroom shall not exceed 45 dBA during nighttime (22-06).

• Outdoors: The 24 h equivalent noise level on

the outside of the windows shall not exceed 55 dBA. In special cases, e.g. due to central locations or where it is not technically or economically possible to fulfi l this demand, it is suffi cient that the demand is fulfi lled outside the windows of at least half of the rooms intended for living. At a patio the equivalent level of the traffi c noise shall not exceed 52 dBA and the maximum level shall not exceed 67 dBA. All levels are free fi eld values

Acoustic environment in dwellingsThe demands in BBR are a minimum level and thus give no guarantee for a disturbance-free environment. There is a standard, SS 252 67: “Sound classifi cation of spaces in buildings - Dwellings”, that simplifi es the design of dwellings with higher acoustic standard.

ClassesAccording to this standard dwellings can – after measurements and/or calculations – be rated in a “acoustic class” which range from A to D. • Class C is the minimum level in the

building code (BBR)• Class B mean “good sound

standard”• Class A mean “excellent sound

standard”• Class D may be used for buildings

where class C is unreachable due to e.g. preservation issues.

Acoustic demands of the classesThe same objects are classifi ed in SS 252 67 as in BBR:– Minimum airborne sound

insulation– Maximum impact noise level– Maximum noise level from

installations– Maximum reverberation time for

different rooms– Maximum outdoor and indoor

noise levels due to traffi c.

Increased frequency rangeIn BBR R´

w and L´

n,w was earlier used

for airborne sound insulation and impact noise level respecively. These summarized values cover the frequency range from 100 - 3150 Hz and gives a single number evaluation of the measured curve by weighting the results with a reference curve.

Modern electronic equipment which have been introduced in our homes, e.g. stereo and TV, can easily radiate sound that can be disturbing in the low frequency region, i.e. below 100 Hz.

In the new BBR and in SS 252 67 measurements shall be performed for an increased frequency range down to 50 Hz.

The new single number terms are written with adaptation terms, C-terms:R´

w + C

50-3150 and L´

n,w + CI,50-2500

For an exact defi nition, see PAROC® Insulation Theory on our web pages www.paroc.com

5


Airborne sound insulation

ClassType of room A B C D

Between dwelling and 61 57 53 49areas outside of dwelling

Between dwelling and 61* 57* 53* 49*external gallery andentrance and outside corridor

Between two rooms 44** 40**within dwelling (applicable for dwellings with more than two rooms)

* Special demands for walls with a door** Without the C-factor

Impact noise level

ClassType of room A B C D

In dwelling from 54 58 62 66stairs, corridor or external gallery

In fl ats from other 48 52 56 60areas

Within dwelling. 64** 68**

* Without the C-factor

Reverberation time

ClassType of room A B C

Stairs 0.8 1.2 1.5

Corridor 0.6 0.8 1.0

Airborne sound insulation, Impact noise level and Reverberation time for Sweden


6

Why choose PAROC® Stone wool?

Stone wool is versatile non-combustible thermal insulationPAROC® Stone wool is the most versatile and commonly used thermal insulation material in many European countries.

PAROC® Stone wool uniquely combines excellent thermal and sound insulation properties with a highly fi re retardant material. In addition to construction, stone wool is used in conditions that impose extremely demanding and versatile requirements on insulation such as the shipping industry and nuclear power plants.

Excellent fi re resistance properties in constructionsPAROC® Stone wool is made of stone and can therefore be used as thermal insulation in applications with highly demanding fi re specifi cations. Almost all types of mineral wool are classifi ed as non-combustible material, but PAROC® Stone wool has an exceptionally high melting temperature of around 1000 °C, providing longer protection. Therefore, rather than adding to the fi re load, PAROC® Stone wool offers an effective fi re resistant thermal insulation solution. Most non-coated PAROC® Stone wool products are classifi ed in best Euroclass A1.

Because of its unique fi re properties PAROC® Stone wool can be utilized as fi re insulation and as structural protective cladding. In structures insulated with PAROC® Stone wool, the spreading of any fi re is retarded or prevented altogether.

The right products guarantee the best resultsOf all mineral wools stone wool possesses the best alkali resistance properties. This is particularly important when dealing with the cement and lime-based mortars associated with rendered facades.

Life-long insulation materialPAROC® Stone wool retains its thermal insulation properties for the entire lifetime of a building. PAROC® Stone wool is a chemically robust material with a strong resistance to organic oils, solvents and alkalis.

Soft and hard at the same timePAROC® Stone wool has excellent properties as the resilient layer in fl oating fl oors. It is possible to make the material hard to bear load from the upper layer of the fl oor. But it is

also possible to make the same product soft enough to effectively reduce the vibrations between the layers in the fl oor.

The important property is called dynamic stiffness which is expressed in MN/m3.

The lower the value of the dynamic stiffness for the Paroc product the better impact sound insulation. Read more about this on page 8.

The behavior of certain construction materials in a “standard” fi re. A “standard fi re” simulates the development of temperature of a fi re in normal room space.

PAROC PROTECTION

®

The insulation that also protects from fire and moisture

PAROC® PROTECTION is our concept for Nordic designed Stone wool, a material that has got superior properties when it comes to protection of fi re and moisture. Living in a home with PAROC® Stone wool insulation provides increased protection against moisture. Stone wool namely does not absorb water particularly well and due to its high steam permeability, it dries quickly if exposed to water. PAROC® Stone wool insulation is also non-combustible and is therefore classifi ed in best Euro Class A1.

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PAROC® Stone wool withstands very high temperatures. The image shows a test sample of the PAROC® UNS product before and after an EN ISO 1182 non-combustion test where the test sample is burned at a temperature of 750 °C. PAROC® UNS are in several of our markets developed into PAROC® eXtra™ with the same or better fi re properties.

Due to a “breathing”, air-permeable structure, moisture evaporates quickly in correctly realized constructions.

Stone wool does not melt even in a fi re. Thus a structure can withstand a fi re considerably longer, which can critically improve the chance of rescue and limit damage.

Retains its formPAROC® Stone wool does not expand or shrink, even as a result of dramatic changes in temperature or humidity. Therefore no cracks will form at the joints of the slabs and there is consequently no risk of heat leakage or moisture condensation.

Does not absorb or accumulate moisturePAROC® Stone wool does not absorb or accumulate moisture in a capillary way, ensuring rapid evaporation in regular structures. A building insulated with PAROC® Stone wool stays dry, ensuring healthy internal air quality and the longevity of the building. Extensive research carried out in Finland by Tampere University of Technology (Microbial Growth in the Insulation of Concrete Panel Facades, 1999) and Turku University (Microbial contamination in rendered insulation

layer of concrete walls, 1999) confi rms that PAROC® Stone wool is a poor environment for microbe growth.

Effi cient sound insulationDue to its porous fi ber structure and high density, PAROC® Stone wool provides excellent insulation against external noise through walls and roofs as well as internal noise through partitions, intermediate fl oors and acoustic ceilings.

SustainablePAROC® Stone wool is sustainable throughout its lifecycle. Stone wool is a proven, durable insulation material that provides signifi cant energy saving, fi re protection and excellent sound insulation properties for a multitude of applications. Stone wool does not con-tain any ingredients or chemicals that prevent or impede recycling.

Paroc – an expert in insulationAs one of the leading thermal insulation manufacturers, Paroc, together with the top researchers and institutions in the fi eld, has developed considerable expertise in the thermal insulation sector.

PAROC® Stone wool and indoor air qualityPAROC® Stone wool is an extremely clean material and as such has been selected as the insulation material for houses built for people with allergies and respiratory illnesses. The Finnish Building Information Foundation and the Indoor Air Association both classify PAROC® Stone wool as the best M1 grade in the emission classifi cations as it does not pollute internal air.


8

PAROC® Stone wool is a heterogeneous material. This means that the dynamic stiffness differs signifi cantly from the static stiffness.

Static stiffness means how much the slab can stand or is pressed down under static load. The dynamic stiffness is equivalent but under dynamic load (vibrations).

The upper surface of a slab with low dynamic stiffness can vibrate signifi cantly without transferring the vibration to the underlying construction.

PAROC® Stone wool is composed of solid material and air. When stone wool is used as resilient layer, the dynamic stiffness, s, is composed of two components:s

d = material stiffness and

sa = the stiffness of the enclosed air.

The following values of sa can be

used for different thicknesses:

t, mm sa MN/m3

5 22 10 11 20 6 30 4 50 2 100 1

The value of sd is measured separately

for respective thicknesses and density of the product

Dimensioning, General

For fl oating fl oor constructions the resilient layer shall be as soft as possible. In accordance with testing standards, the dynamic stiffness of stone wool must be stated for a loading of 200 kg/m2 when it is to be used in fl oating fl oor under concrete overfl ow. The material is tested in accordance with EN 29052-1:

Dynamic stiffness, sd MN/m3, at a load of 200 kg/m2

Thickness 20 25 30 50

PAROC® SSB1 12 10PAROC® SSB2t 17 15

Altogether the dimensioning dynamic stiffness will be:

Dynamic stiffness, sa +sd , MN/m3, at a load of 200 kg/m2

Thickness 20 25 30 50

PAROC® SSB1 16 12PAROC® SSB2t 23 19

For further thicknesses see diagram below.

Estimating Sound InsulationWhen estimating airborne as well as impact sound insulation between rooms in buildings, it is not enough to use insulation data from the separating elements, like the intermediate fl oor. The total sound insulation is also affected by the transport of sound in fl anking constructions. This fact is especially valid for high levels of sound insulation.

Therefore it is not always certain that the mentioned insulation data of the fl oors will be fulfi lled in the buildings.

A fl oating fl oor may often be a better solution than a soft carpet on the fl oor, just because of the lower fl anking transmission.

When estimating sound insulation you can fi nd calculating models in the European standards: EN 12354-1 and EN 12354-2

Other Stone Wool ProductsThe PAROC® SSB products are specially designed for the fl oor application. The Fibre orientation is mainly horisontal compared to e.g. root slabs or ground slabs. The horizontal fi bre direction gives a lower dynamic stiffness, which means a better impact sound insulation. The difference when used in fl oor may be 5 dB or even more. This means one class difference.

The lower the dynamic stiffness value, the better impact sound insulation.

The dynamic stiffness, sa + sd, MN/m3, for PAROC® SSB 1 and PAROC® SSB 2t

PAROC® ROS(Roof Slab)

PAROC® SSB

9



10

An intermediate fl oor made of concrete has already a relatively good airborne sound insulation. The new demands for impact sound insulation makes it however more and more common to add a fl oating fl oor.

AssemblyThe fl oating concrete slab shall be homogenous with a thickness of at least 50 mm. It shall be separated from the adjacent building elements so that it may move freely in all directions. This can be achieved using strips of stone wool against the walls, pillar foundations, etc. The separation is important, not the thickness of the layer.

When casting the fl oating concrete slab all transportation on the resilient layer must be done on temporary bridges.

Dimensioning Concrete Floors

Approximate data for airborne and impact sound insulation of concrete fl oors, with and without a fl oating fl oor, see table.

With 30 mm instead of 50 (PAROC® SSB 1) or 17 mm instead of 25 (PAROC® SSB 2t), the impact noise level can be roughly 1-3 dB worse.

The thicknesses given in the table above are for homogenous concrete. However, it is the surface weight (kg per square meter) that is important, which means that hollow core concrete fl oors with the same surface weight will give approximately the same results.

Use strips of stone wool against the walls to separate the fl oating concrete slab from the adjacent building elements

The table above present simple examples of the result with PAROC® Step Sound Board in the construction. On page 14-15 you can fi nd solutions that meet the current demands in Sweden.

2*13 gypsum board + 50 mm concrete Wooden fl oor board + + 50 mm PAROC® SSB1 25 mm PAROC® SSB2 + +Concrete fl oor Concrete fl oor Concrete fl oor Concrete fl oor

Density R’w /L’nw R’w /L’nw R’w /L’nw

kg/m2 dB/dB dB/dB dB/dB

300 (130 mm) 50/80 55/50 53/58400 (175 mm) 55/75 60/45 58/53600 (260 mm) 60/70 65/40 63/48

R’w + C50-3150 can be 0-3 dB lower.L’nw + CI,50-2500 can be 0-3 dB higher.

Results

11


12345

Floor covering

Floating concrete slab

PAROC® SSB 1

Load bearing concrete structure

Ceiling

5

1

2

3

4


12

Floating fl oors and suspended ceilings can be used either individually or in combination. It is common nowadays that a combination is used to reach the sound insulation demands. The solutions below have suffi cient strength and rigidity to be used in residential premises and offi ces.

Dry fl oating fl oor using panelsThese are constructed using a resilient layer of PAROC® Step Sound Board SSB 2t under pressure distributing panels of the fl oating fl oor.

Alternative 1:

• 14 mm Parquet• 22 mm Floor fi bre-board with tongue and groove• 25 mm PAROC® Step Sound Board SSB 2t

Alternative 2:

• Floor covering• 13 mm Floor gypsum• 19 mm Floor fi bre-board with tongue and groove• 25 mm PAROC® Step Sound Board SSB 2t

AssemblyThe boards are laid with the cloth covered side facing up. The tongues and grooves of the fl oor sheets are glued and the sheets are laid cross -ways. A 50-100 mm wide stud is laid against the adjacent walls, by the doors and under heavy fi xed fi ttings in order to prevent sinking. The stud must be 2 mm thinner than the boards. The joints along the walls are sealed using elastic joint sealer.

Dimensioning Wooden Floors

Approximate data for airborne and impact sound insulation of wooden fl oors, with and without a fl oating fl oor and suspended ceiling:PAROC® Step Sound Board (SSB 2t) is also available with a thickness of 25 mm.

Result

By choosing the thicker board the result may be a few dB better. This solution is therefore recommended if the solution is close to a limit in the demands.

In order to prevent impact sound transport from people walking and from the partition walls, the fl oor should be fi nished according to the fi gure above.

13 mm gypsum board 40 mm Anhydrit (70) + + 22 mm wooden fl oor board Plastic foil + + 17 mm PAROC® SSB2t 17 mm PAROC® SSB2t + + Normal wooden fl oor, Wooden fl oor, Wooden fl oor, 170 mm + 95 mm PAROC® eXtra™ 220 mm + 95 mm PAROC® eXtra™ 220 mm + 220 mm PAROC® eXtra™ + +

Suspended ceiling Suspended ceiling

Thickness 235 350 355mm

R’w/L’nw 35/78 60/54 60/50dB/dB

R´w + C50-3150 / - / - 52 /58 56/54Lń,w + CI,50-2500

dB/dB

13


12345

Floor covering

Flooring panel

PAROC® SSB 2t

Flooring panel

Wooden beams + PAROC® eXtra™

Ceiling6

1

2

6

5

3

4


14

PAROC® Solutions, Impact sound

Stair of Demands: A-, B- and C-classes, Lń,w + CI,50-2500 requirements for Sweden

48 C A-class: In fl ats from other room

B-class: In fl ats from other room

A-class: In fl ats and from stairs, corridor or external gallery

C-class: In fl ats from other room

PAROC® SolutionsSound Level Construction Description Airborne sound

This construction Demand

R´w + C50-3150 R´w + C50-3150

48 C 50 mm concrete 64 61 50 mm PAROC® SSB 1 250 mm concrete

52 C 50 mm concrete 61 57 50 mm PAROC® SSB 1 200 mm concrete

54 C 50 mm concrete 62 61 50 mm PAROC® SSB 1 HD/F 120/27

56 C 50 mm fl oor plasterboard 58 53 30 mm PAROC® SSB 1 160 mm concrete

58 C 2 x 12,5 mm fl oor plasterboard 58 57 17 mm PAROC® SSB 2t HD/F 120/27

62 C 2 x 12,5 mm fl oor plasterboard 54 53 25 mm PAROC® SSB 2t HD/F 120/19

58 C B-class: In fl ats and from stairs, corridor or external gallery

62 C C-class: In fl ats and from stairs, corridor or external gallery

Note: The values given are valid for the construction in a building, including fl anking transmission etc. When measured in laboratory the single construction may give better values.

!

52 C

54 C

56 C

15


Stair of Demands: A-, B- and D-classes, Lń,w requirements for Sweden

48 C

D-class: In fl ats from other room

A-class: Within fl at. To one or several rooms

D-class: In fl ats and from stairs, corridor or external gallery

B-class: Within fl at. To one or several rooms

PAROC® SolutionsSound Level Construction Description Airborne sound

This construction Demand

R´w R´w

60 2 x 12,5 mm fl oor plasterboard 56 49 17 mm PAROC® SSB 2t HD/F 120/20

64 22 mm fl oor chipboard 55 44 25 mm PAROC® SSB 2t HD/F 120/20

66 22 mm fl oor chipboard 54 49 17 mm PAROC® SSB 2t HD/F 120/20

68 Any fl oating fl oor on any 40 concrete intermediate fl oor

60

64

66

68


16

The aim of the stairs is to present solutions which can meet the local demands. It is allowed in the EN-regulations to calculate the total sound insulation and impact noise level using the methods in EN 12354-1 and EN 12354-2. The security margin in the example constructions is set to at least 4 dB to account for varying room sizes and types of fl anking constructions. The rooms used in the examples are placed directly above each other, each with a size of Length x Width x Height =5x4x3 m. Flanking transmission is included in the model but is only relevant for the highest sound insulation examples.

The use of suspended ceilings does not give an increased impact noise insulation for demands below 40 dB including the C-factor.

One layer of plasterboard can be changed to one layer of chip board.

The impact noise level in practise is also depending on the chosen fl oor covering. Below you will fi nd a rough estimation of how big this infl uence is for different fl ooring materials placed on the fl oating fl oor.

Material ΔLn,w ΔLn,w + CI,50-2500

Linoleum 0 0PVC 1 1Parquet 2 1

Installations through the fl oor have to be separated with soft layers from both the main fl oor and the fl oating fl oor.

Comments to Solutions

Example calculations have also been done for fl oating fl oors on a wooden structure and comparing them to measurement results. The differences between calculations and measurements show very large fl uctuations and hence it is impossible to give general recommendations. Wooden structures have to be calculated, or maybe even measured, from case to case.

Of course it is possible to calculate the sound insulation and impact noise level for other combinations of concrete and fl oating fl oors than the examples presented above. The examples serve as guidelines for the total thickness and total in situ airborne sound insulation and impact noise level.

Recommendation: To make installation more simple please choose one solution for the whole building.

!Note: The constructions given are mainly based on concrete. A wooden structure is more complicated and has to be individually calculated for each combination of materials and thicknesses

17


More information on our website www.paroc.com

Product Information

PAROC® SSB 2t

Rigid, high quality impact sound insulation slab, fi re safe stone wool with glass tissue facing on one side. Special product for intermediate fl oor impact sound insulation to be placed underneath pumpable fi ller or for wooden intermediate fl oors.

Width x Length Thickness600 x 1200, 1800 x 1200 mm 20, 25, 30, 50 mmIn accordance with In accordance withEN 822 EN 823

PackagingPlastic Package or Loose Product on a Pallet

Lambda, declared, λD 0,037 W/mKIn accordance with EN 13162

Reaction to Fire A1,In accordance with EN 13501-1

Water absorption (short term), declared, WS ≤1 kg/m2 In accordance with EN 1609

Water absorption (long term), declared, WL(P) ≤3 kg/m2

In accordance with EN 12087

Water vapour transmission, declared, MUi 1In accordance with EN 12086

Compressive stress at 10% deformation, σ10 ≥40 kPaIn accordance with EN 826

Dynamic Stiffness, sa + sd See diagram on page 8In accordance with EN 29052-1

This board is the soft spring for step sound insulation.

PAROC® SSB 1

Rigid, high quality impact sound insulation slab, fi re safe stone wool. Special product for intermediate fl oor impact sound insulation to be placed underneath the fl oating concrete slab.

Width x Length Thickness600 x 1200 mm 30, 40, 50 mmIn accordance with In accordance withEN 822 EN 823

PackagingPlastic Package

Lambda, declared, λD 0,035 W/mKIn accordance with EN 13162

Reaction to Fire A1In accordance with EN 13501-1

Water absorption (short term), declared, WS ≤1 kg/m2 In accordance with EN 1609

Water absorption (long term), declared, WL(P) ≤3 kg/m2

In accordance with EN 12087

Water vapour transmission, declared, MUi 1In accordance with EN 12086

Compressive stress at 10% deformation, σ10 ≥15 kPaIn accordance with EN 826

Dynamic Stiffness, sa + sd See diagram on page 8In accordance with EN 29052-1

This board is the soft spring for step sound insulation.


18

General Working Instructions

Installation of the InsulationThe product should be cut carefully so that the joints fi t tightly together. The best results are achieved by cutting on a separate cutting table using tools that have been specifi cally designed for the purpose.

The use of small pieces of insulation best avoided as it can lead to defective joints. The product should be fi tted tightly against its base and care should be taken to avoid the creation of contact between the layers of concrete and air gaps between the layers of wooden board. Avoid 4-corner meetings because this may create a mechanically weak point of the construction.

The insulation shall be covered by a plastic foil, a paper or equal. This is to avoid concrete between the slabs, which can bring contact between the concrete layers.

Avoid walking on the insulation. Pipes are allowed in a separate added layer without effect on the impact sound reduction.

Assembly for the Concrete SolutionThe fl oating concrete slab shall be homogenous with a thickness of at least 50 mm. It shall be separated from the adjacent building elements so that it may move freely.This can be achieved using strips of stone wool against the walls, pillar foundations, etc.

When laying the concrete all transportation on the resilient layer must be done on temporary bridges.

Assembly for the Wooden SolutionThe boards are laid with the cloth covered side facing up. The tongues and grooves of the fl oor sheets are glued and then they are laid crossways. A 50-100 mm wide stud is laid against the adjacent walls, by the doors and under heavy fi xed fi ttings in order to prevent sinking. The stud must be 2 mm thinner than the boards. The joints along the walls are sealed using elastic joint sealer.

In order to prevent impact sound transport from people walking and from the partition walls, the fl oor should be fi nished according to the fi gure above.

joint sealer50-100 mm studfl oor material

Use strips of stone wool against the walls to separate the fl oating concrete slab from the adjacent building elements

19


2061BIEN0112

PAROC GROUPP.O.Box 47FI-00621 Helsinki, FinlandPhone +358 46 876 8000 www.paroc.com

A M E M B E R O F P A R O C G R O U P

The information in this brochure describes the conditions and technical properties of the disclosed products, valid at the time of publication of this document and until replaced by the next printed or digital version. The latest version of this brochure is always available on Paroc web site.Our information material presents applications for which the functions and technical properties of our products have been approved. However, the information does not mean a commercial guarantee, since we do not have full control of third party components used in the application or the installation.We cannot warrant the suitability of our products if used in an area which is not provided in our information material.As a result of constant further development of our products we reserve the right to make alterations to our information material.PAROC and red and white stripes are registered trademarks of Paroc Oy Ab. © Paroc Group 2012

Paroc Group is one of the leading manufacturers of mineral wool insulation products and solutions in Europe. PAROC® products and solutions include building insulation, technical insulation, marine insulation, structural stone wool sandwich panels and acoustics products. Paroc has production facilities in Finland, Sweden, Lithuania and Poland, and sales and representative offi ces in 13 countries across Europe.

Building Insulation produces a wide range of products and solutions for all traditional building insulation. The building insulation is mainly used for thermal, fi re and sound insulation of exterior walls, roofs, fl oors, basements, intermediate fl oors and partitions.

Sound absorbing ceilings and wall panels for interior acoustic control, as well as industrial noise control products, are available in the range.

Technical Insulation is used for thermal, fi re and sound insulation in building techniques, industrial processes and pipe work, industrial equipment and ship structures.

PAROC® fire proof panels are lightweight steel-faced panels with a core material of stone wool.PAROC® panels are used for façades, partition walls and ceilings in public, commercial and industrial buildings.

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Impact Sound Insulation - PAROC

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