Building Acoustics Guide
Building AcousticsGuide
Noise affects everyone. It is everywhere... in the street, on work-sites, in stations and airports but also
in our houses.
We are all sensitive to noise, whether at work or at home, alone or socially.
This well-known urban phenomenon causes numerous problems such as sleep disorders, stress or loss of
concentration. Acoustic comfort is an essential element of the quality of life.
ISOVER has been conducting extensive research and development to achieve this goal for many years.
It is constantly improving its products in order to enhance their acoustic performance. As a result, they
provide the best available response to acoustic issues.
Silence is the feature of places where we feel comfortable.
44% of the EUs population is exposed to a harmful
level of traffic noise
according to WHO guidelines (Lday > 55 dB)
PRINCIPLES OF BUILDING ACOUSTICS
UNDERSTANDING SOUND 3 AND NOISE
Sound 4
Noise and the human ear 5
Noise level addition rules 7
Noise sources 8
Noise level scale 9
BUILDING ACOUSTICS 11Sound Insulation 13
> Airborne Noise 13
> Impact Noise 15
> Equipment Noise 16
Achieving effective sound insulation 18
Achieving proper impact sound insulation 20
Acoustic correction 21
Choosing the right insulation solution 24
ACOUSTIC REGULATIONS 27Republic of Ireland 28
Northern Ireland 30
ACOUSTIC APPLICATIONS & PRODUCT GUIDE 35Separating Party Walls
Timber Frame Twin leaf construction 38
Metal Stud Twin leaf construction 39
Masonry Single leaf construction 40
Other Construction Types 41
Partitions
Internal Partitions Metal studs 42
Internal Partition Timber studs 43
Floors
Separating Floors Timber 44
Internal Floors Timber 45
ISOVER PRODUCTS 46
Contents
BUILDING ACOUSTICS BASICS 01
02 BUILDING ACOUSTICS BASICS
SOUND 4
NOISE AND THE HUMAN EAR 5
NOISE LEVEL ADDITION RULES 7
NOISE SOURCES 8
NOISE LEVEL SCALE 9
UNDERSTANDING SOUND AND NOISE
03
03
DEEP SOUND HIGH-PITCHED SOUND
Pre
ssur
e (P
a)
Frequency (Hz)
Time (s)
UNDERSTANDING SOUND AND NOISE
SOUND
Sound is an auditory sensation produced by an air pressure variation propagated in all ambient
environments (water, air, gases, concrete, wood, glass, etc.) excepting a vacuum.
This sensation is perceived by our ear, from which the information is sent to the brain
where it is analysed.
In a building, sound can come from outside (road, rail or air traffic,
or voices in the street), from equipment in the building, from neighbours
or from ourselves.
SOUND CHARACTERISTICSSOUND IS CHARACTERISED BY 1 ITS FREQUENCY 2 ITS SOUND LEVEL 3 ITS LENGTH
1 THE FREQUENCY of a sound is the number of air pressure fluctuations per second and is expressed
in Hertz (Hz). This frequency determines the pitch of the sound: a low frequency produces a deep
sound, whereas a high frequency will give a high-pitched sound.
Frequency (Hz)
Frequency (Hz)
1009080706050403020100
5,000
4,500
4,0003,5
003,0
002,5
002,0
001,5
001,0
0050
0
9080706050403020100
20 100 350 1,500 5,000 20,000
deepsounds
mid-rangesounds
highsounds
RANGE AUDIBLE BY HUMAN EARInfrasound Ultrasound
RANGE TAKEN INTO ACCOUNT FOR BUILDING ACOUSTICS
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STANDARD EMITTED NOISE1NOISE DETECTED BY THE EAR2
Level (dB)
Level(dB)
04 BUILDING ACOUSTICS BASICS
3 LENGTH: the ability to perceive a given sound varies depending on how long the sound is heard.
In some cases, the regulations refers to this
scale in order to take into account the “ear’s
sensitivity”.
In terms of the sound level, the smallest variation
liable to be detected by the ear is around 2–3 dB (A).
The human ear can detect sounds of
frequencies between 20 and 20,000 Hz with
various degrees of sensitivity depending on
the frequency.
As a result, in some cases we use the dB(A),
a scale representing more accurately the
sensitivity of the human ear. The dB(A)
reduces a lot the sounds less perceived by
ear (notably deep ones) and, reduces less the
high-pitched sounds.
Frequency (Hz)
Frequency (Hz)
1009080706050403020100
5,000
4,500
4,0003,5
003,0
002,5
002,0
001,5
001,0
0050
0
9080706050403020100
20 100 350 1,500 5,000 20,000
deepsounds
mid-rangesounds
highsounds
RANGE AUDIBLE BY HUMAN EARInfrasound Ultrasound
RANGE TAKEN INTO ACCOUNT FOR BUILDING ACOUSTICS
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STANDARD EMITTED NOISE1NOISE DETECTED BY THE EAR2
Level (dB)
Level(dB)
Frequency (Hz)
Frequency (Hz)
1009080706050403020100
5,000
4,500
4,0003,5
003,0
002,5
002,0
001,5
001,0
0050
0
9080706050403020100
20 100 350 1,500 5,000 20,000
deepsounds
mid-rangesounds
highsounds
RANGE AUDIBLE BY HUMAN EARInfrasound Ultrasound
RANGE TAKEN INTO ACCOUNT FOR BUILDING ACOUSTICS
12
STANDARD EMITTED NOISE1NOISE DETECTED BY THE EAR2
Level (dB)
Level(dB)
Frequency (Hz)
Frequency (Hz)
1009080706050403020100
5,000
4,500
4,0003,5
003,0
002,5
002,0
001,5
001,0
0050
0
9080706050403020100
20 100 350 1,500 5,000 20,000
deepsounds
mid-rangesounds
highsounds
RANGE AUDIBLE BY HUMAN EARInfrasound Ultrasound
RANGE TAKEN INTO ACCOUNT FOR BUILDING ACOUSTICS
12
STANDARD EMITTED NOISE1NOISE DETECTED BY THE EAR2
Level (dB)
Level(dB)
The noise spectrum represents the sound levels according to the frequency
NOISE AND THE HUMAN EARPhysically, a noise is a set of sounds of differing frequencies and power levels.
Level (dB)
LOUD SOUND QUIET SOUND
Time (s)
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2 THE SOUND LEVEL characterises a sound’s amplitude. A low amplitude
produces a quiet sound; a high amplitude produces a loud sound. As
the human ear has a very wide perception scale, in practice we use a
logarithmic scale to represent the sound amplitude. This smaller scale
is expressed in decibels (dB).
05
Unwanted noise
A noise hidden by other noises during the day might be disturbing at night
Cocktail effect: difficulty in understanding a conversation in a noisy internal environment,
requiring the speaker to talk louder
Noises representing a danger or reminder
Exposure time
Filtering of noise: noises that are harmonious or acceptable when heard directly can become difficult
to withstand when emitted behind a wall (filtering certain frequencies)
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Physiologically, noise is a generally unpleasant or uncomfortable auditory
sensation. This is a purely subjective concept. A noise may be perceived
by a person as being a nuisance due to the length of time for which he or
she is exposed to the noise, its appearance during a period of sleep or
the memory associated to the noise.
NOISE LEVEL ADDITION RULES
As the sound level is expressed using a logarithmic scale, in decibels (dB),
arithmetic addition rules do not apply to noise levels.
IF THE NOISE LEVELS ARE SIMILAR (DIFFERENCE < 10 dB):
If the noises are similar, the resulting noise level is evaluated by adding the value provided
in the following table to the louder noise:
IF THE NOISE LEVELS ARE VERY DIFFERENT:
If the difference between the sound levels is at least 10 dB, the louder noise hides the weaker noise.
+ 170dB83dB 87dB 88,5dBbut≠+ 166dB83dB 83dB 86dBbut≠
+95dB 80dB 95dB=
+ 170dB83dB 87dB 88,5dBbut≠+ 166dB83dB 83dB 86dBbut≠
+95dB 80dB 95dB=
Difference between two sound levels (in dB) Ó Ó Ó Ó Ó Ó Ó Ó Ó
0 1 2 3 4 5 6 7 8 9
Value to be added to the highest level (in dB)
3.0 2.6 2.1 1.8 1.5 1.2 1.0 0.8 0.6 0.5
Ó Ó Ó Ó Ó Ó Ó Ó Ó Ó
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NOISE SOURCESThere are four noise sources in the building acoustics domain:
1 Airborne noise from external sources: road, rail or aircraft noise, voices in the street, etc.
2 Airborne noise from internal sources: conversations, Hi-Fi, television, etc.
3 Impact noise: movements of people or furniture, falling objects, etc.
4 Equipment noise: elevators, valves, ventilation fans, etc.
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NOISE LEVEL SCALE
Noise can cause cognitive disorders:
Increased tiredness and level of stress. As a result, recovery periods in a calm, quiet location are required.
Noise can directly affect personal health, depending on its intensity and exposure time:
This can consist of sleep disorders, effects upon the cardiovascular system (rapid heartbeat and raised blood
pressure) and impaired hearing acuity.
Calm is a source of well-being.
120
140
130
110
100
90
80
70
60
50
40
30
20
10
Impossible to hear each other (jet engine at ground) 100–130 dB, deafening noise
Shout to be heard (concert or train passing) 80–100 dB, dangerous noise
Talk loudly to be heard (washing machine, screaming baby or noisy classroom) 60–80 dB, tiring noise
Talk softly (quiet o�ce or normal conversation) 40–60 dB, ambient noise
Whispering (wind in the trees, quiet apartment or library) 10–40 dB, slight noises
120
140
130
110
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90
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60
50
40
30
20
10
On ne s'entend plus (moteur d'avion à réaction au sol) De 100 à 130 dB, bruits assourdissants
Crier pour s'entendre (concert, passage d'un train)De 80 à 100 dB, bruits dangereux
Parler fort pour s'entendre (machine à laver, hurlements de bébé, salle de classe bruyante) De 60 à 80 dB, bruits fatigants
Parler doucement (bureau calme, conversation à niveau normal) De 40 à 60 dB, bruits d'ambiance
Chuchoter (vent dans les arbres, appartement calme, bibliothèque) De 10 à 40 dB, bruits légers
Hearing loss
above 140 dB
Pain threshold
120–140 dB
Normal conversation
55–75 dB
Audibility threshold
>3 dB
In order to be noticeable, any acoustic improvement must be more than 3 dB. As a result,
any difference of less than 3 dB between two sound insulation systems (mainly technical or
materials used) will not be audible.
Reducing the level by 10 dB gives the impression of hearing half the noise.
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SOUND INSULATION 13
> AIRBORNE NOISE 13
> IMPACT NOISE 15
> EQUIPMENT NOISE 16
ACHIEVING EFFECTIVE SOUND INSULATION 18
ACHIEVING PROPER IMPACT SOUND INSULATION 20
ACOUSTIC CORRECTION 21
CHOOSING THE RIGHT INSULATION SOLUTION 24
BUILDING ACOUSTICS
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BUILDING ACOUSTICS
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THERE ARE TWO TYPES OF ACOUSTIC
TREATMENTS IN THE BUILDING :
Sound insulation: to reduce
transmission through walls,
partitions, floors or ceilings
(directly or indirectly)
See pages 13–20
Acoustic correction: to reduce a
room’s noise by means of absorbent
materials
See pages 21–23
1 Direct emission
2 Sound reflected by a wall
3 Direct transmission through a wall
4 Indirect transmission through walls
12 BUILDING ACOUSTICS BASICS
SOUND INSULATIONThe aim of acoustic insulation is to reduce noise transmission from one
room to another. As a result, the noise is reduced and comfort improved.
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Uninsulated walls Insulated walls
> The higher Rw is, the better the wall’s sound insulation.
Standardized level difference (field measurement):
DnT measures the quantity of sound stopped between two rooms,
taking into account all transmission (direct, lateral and parasite).
The insulation DnT varies depending on the frequency f (in Hz).
The overall value of the sound insulation is given by the index DnT,w(C; Ctr).
> The higher the DnT,w value, the more effective the insulation between the two rooms.
The regulatory value to follow is the sound insulation, as this takes into account
all transmitted sound. It is stated in the acoustic regulations (see the acoustic
regulations section on pages 28–31).
Three types of noise can be reduced by means of sound insulation:
1 AIRBORNE NOISE 2 IMPACT NOISE 3 EQUIPMENT NOISE
The acoustic performance expected from a room, in relationship with its neighboring rooms is achieved through insulation.
It depends on three parameters:
The acoustic properties of the products and systems used
The techniques implemented and the installation quality
The architectural context: join between walls and structural materials used.
1 Airborne noise
Two values are used to estimate sound insulation performance
against airborne noise (in dB):
Sound Reduction Index (laboratory measurement):
R measures the quantity of sound stopped by the wall, taking into account
solely direct transmission, at each frequency f (in Hz).
The overall value of the Sound Reduction Index is given by the index Rw(C ; Ctr).
ISOVER Recommendation: in order to obtain the proper insulation level, ISOVER advises choosing
walls whose RW index is at least 5 dB higher than the desired DnT,w value.
Emitting room
Receiving room
Test laboratory
Emitting room
Receiving room
Work-site
13
R(dB)
40
50
60
70
80
90
100
4,0
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2,0
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1,00
0
500
250
125
f(Hz)
Correction depending on the type of sound
As walls do not stop different types of sounds in the same way, their acoustic properties are corrected according
to the noise sources. They provide most effective insulation against pink noise (internal airborne sounds: TV sound,
conversation, etc.) or traffic noise (external airborne noise rich in low frequencies: road or rail transport infrastructure
noise, etc.).
We then talk of the following:
Sound Reduction Index for pink noise: RA = Rw + C
Standardized level difference for pink noise: DnT,A = DnT,w + C
Sound Reduction Index for traffic noise: RA,tr = Rw + Ctr
Standardized level difference for traffic noise: DnT,A,tr = DnT,w + Ctr
We often also talk of the Sound Reduction Improvement Index,
rated ∆R (in dB).
This is the difference between the Sound Reduction Index of an acoustically-treated wall and the index of the same
wall without insulation.
This value therefore represents the acoustic performance of an insulating system and can be used to compare the
performance of insulation systems for a given wall.
> The higher the ∆R value, the better the wall’s insulation.
Sound Reduction Index Sound insulation (in dB) Sound Reduction improvement (in dB)
Rw(C;Ctr) RA for pink noise RA,tr for road traffic noise ∆RA ∆RA,tr
Concrete block wall + Optima System with 100mm ISOVER High Performance Mineral Wool Insulation
78(-2 ; -8) 76 70 21 17
Uninsulated concrete block wall 56(-1 ; -3) 55 53 - -
Sound Reduction Index graph for an OPTIMA assembly with GR32 insulation 100 mm thick and BA13 finish, on 200 mm concrete block walls.
How should Sound Reduction Index measurements be read?
The measurement graphs represent the sound insulation
measurement relative to sound frequency. These graphs
are used to calculate the Sound Reduction Index: Rw
The pink noise and traffic noise spectra are then applied to
these graphs in order to obtain the RA and RA,tr indexes.
> RA must be considered in the case of interior partition, solid, separating or dividing walls
> RA,tr must be considered in the case of external walls or roofs
In this example:
The insulated wall reduces the pink noise (internal airborne) by 76 dB
The insulated wall reduces the road traffic noise (external airborne) by 70 dB
Without insulation, the wall would reduce the pink noise by 55 dB and traffic noise by 53 dB.
The OPTIMA insulation system can provide an additional insulation gain of 21 dB for the pink noise,
and 17 dB for the road traffic noise.
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2 Impact noiseIt is important to handle impact noise from one room to another
(footsteps on a floor or object falling on the floor, for example),
another source of discomfort in a room.
Direct transmission through the floor is often the main vector.
However, the sound can also be transmitted through
other walls, depending on their type and joints.
The regulatory value relating to impact noise is the Weighted
Standardized Impact Sound Pressure Level L’nT,w (in dB).
This measurement is performed on job site, by using a standard
tapping machine.
> The lower lower the value is, the less the noise
is noticed in the next room.
We often speak of the ∆L w (or impact sound insulation improvement)
to evaluate the performance of an insulation system against impact
noise transmitted by the floor under laboratory conditions.
This value is the measured difference between an insulated floor
and an uninsulated 14 cm concrete floor.
The result represents a product (or system) only in terms of direct
transmission.
> The higher the ∆L w value, the more the insulation
system attenuates impact noises.
1 �� Direct transmission
through the wall
2 �� Indirect transmission
through walls
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A building’s equipment may be occasionally or continuously annoying and have different acoustic impacts
in the building:
1 The equipment may emit noise when operating, which we try to minimise (through insulation or absorption).
An example of this is ventilator or motor noise.
2 The joint between the equipment and the mounting on which it is fixed can transmit this sound to other rooms.
We then try to isolate the equipment from the mounting in order to reduce the vibrations.
3 Noise can radiate through pipes lines or ventilation ducts (in the case of ventilation ducts, for example, or
noise in ducts).
It is possible to act in two ways:
By reducing the noise generated by the equipment
A device’s sound level, LW in dB(A), is determined under laboratory conditions.
> The lower the value LW, the quieter the device.
By reducing the transmission of the noise emitted
The normalized sound pressure level , LnAT in dB(A), represents the noise in a room when a device is operating.
> The lower the value LnAT, the quieter the device in the room.
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The following standards provide more information on the definition and measurement of these values:
Airborne sound insulation: NF EN ISO 10140-1, NF EN ISO 10140-2 and NF EN ISO 717-1
Impact sound insulation: NF EN ISO 10140-1, NF EN ISO 10140-3 and NF EN ISO 717-2
Airborne, impact and service equipment sound insulation (field measurements): NF EN ISO 10052.
SUMMARY OF INDEXES AND THEIR MEANING
Noise sourcePerformance
evaluationLaboratory
measurement indexField
measurement indexHow to reduce
the noise
Internal airborne noise/ Pink noise
Noise difference between two rooms
RA = Rw+C (in dB)Sound Reduction Index
for pink noise Sound insulation
DnT,A = DnT,w + C (in dB)
Standardized level difference for pink noise
Noise reduction when RA
or road DnT,A is high
External airborne noise/ road traffic noise
Noise difference between exterior
and interior
RA,tr = Rw+Ctr (in dB)Sound reduction index
for traffic noise sound insulation
DnT,A,tr = DnT,w + Ctr (in dB)
Standardized level difference for traffic noise
Noise reduction when
RA,tr or DnT,A,tr is high
Impact noise
Noise heard in the next room (impact noise)
L’nT,w (in dB) Standard impact noise weighted pressure level
Noise reduction when
L’nT,w is low
Noise difference between
an insulated floor and a reference floor
∆L w (in dB)Impact sound insulation
improvement
Noise reduction when
∆L w is high
Equipment noise
Noise heard at the other side
of the wall (equipment noise)
L nAT (in dB(A)) Standard sound pressure level
Noise reduction when
L nAT is low
Equipment noise emission level
L w (in dB(A))Equipment sound level
Noise reduction when
L w is low
AIRBORNE NOISE/IMPACT NOISE/EQUIPMENT NOISE
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MORE INFORMATION
Increasing the concrete thickness from 10 to 16 cm increases the
sound insulation weight by switching from for all frequencies by
around 10 dB.
Increasing the surface gypsum boards 10 cm thick (surface
weight 100 kg/m2) to concrete of the same thickness (surface
weight 220 kg/m2) reduces the critical frequency from 400 Hz
to 100 Hz while also increasing the wall sound insulation.
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50
60
80
70
125 250 500 1K 2K 4K
R(dB)
f(Hz)
ATTENUATION INDEX
10 cm concrete
16 cm concrete
10 cm gypsum boards
10 cm gypsum block
10 cm concrete
16 cm concrete
Rw (C;Ctr) 38(-1 ;-3) 49(-2 ;-7) 59(-2 ;-6)
Critical frequency
According to an experimental law called the Mass Law, the Sound Reduction Index sound insulationof single-skin walls varies with the frequency. The critical frequency is the frequency at which the wall’s sound insulation is the lowest. Beyond this frequency, the attenuation index increases linearly.
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Single-skin partition wall behaviour: the Mass Law
Principle:
Single-skin partition walls are composed of a single material. Their acoustic performance varies depending on its
nature and surface weigh. In this particular case, the heavier and thicker the wall, the better the sound insulation.
What performance do single-skin walls offer?
The critical frequency (frequency at which the sound insulation is the lowest) must be below 100 Hz for the wall to
be acoustically effective.
This frequency can be reduced by increasing the thickness of the single-skin wall.
ACHIEVING EFFECTIVE AIRBORNE SOUND INSULATIONCombating airborne noise is a two-stage process:
Identifying the noise sources
Treating the partition wall effectively by taking into account
the frequencies emitted
MORE INFORMATION
ON SINGLE-SKIN WALLS
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Wall Sound Insulation
18 cm concrete wall RA = 60 dB 60 dB 70 dB 56 dB
215mm Block Masonry on flat with ISOVER Calibel dabbed and placed on one side. RA = 56 dB60 dB 70 dB 56 dB
Separating party wall with double-framed structure with 50mm Acoustic Roll, 100mm Spacesaver plus, gyproc plank & Standard wallboard single layers on either side.
RA = 70 dB60 dB 70 dB 56 dB
ISOVER mineral wools are excellent sound absorbent materials.
Thanks to its open-cell, porous structure (due to its randomly arranged
fibres), it traps the sound energy and dissipates it within its thickness.
Better acoustic attenuation can be
achieved with light systems than
with heavy systems, within the
same thickness.
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Mass-spring-mass systems and the effect of ISOVER mineral wools
Principle:
To optimise the acoustic performance of walls and reduce their weight and
thickness, double-skin walls may be used (referred to as lightweight walls).
These are composed of two single-skin walls separated by a cavity.
In order to improve the sound insulation, the cavity created between the
two skins is filled with an insulating material.
These partitions respect to the so-called “mass-spring-mass” principle:
1 The first skin serves as a mass (as in a single-skin wall): it reflects a part
of the noise and allows the rest to pass.
2 The remaining noise is transmitted into the elastic insulating material,
which absorbs it and so reduces the amplitude of the waves.
3 The second skin again reflects part of the noise inside the isolating
material (which absorbs more noise).
4 It finally transmits the attenuated noise into the adjoining room.
IN SUMMARY: Double-skinned walls are useful
because they offer high attenuation without
requiring heavy or excessively thick walls.
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SOUND INSULATION
Recommended action In order to achieve the most effective floor insulation against impact noise, handling the noise at its source is
recommended.
Treating the floor in the room in which the impacts occur is also recommended. This is done by separating the
supporting structure from the finished floor, thereby reducing lateral transmission and ensuring that direct impact
noise is partly absorbed by the insulating material between the two elements.
> Due to their elasticity, glassl wool and stone wool both provide effective isolation, between the screed
and the concrete slab for example. In this case, the glass wool provides the mechanical link between
the two claddings, serving as a spring to act as an intermediate or as spacing material that actively
helps to increase the acoustic insulation.
The insulation used in this case must therefore be sufficiently elastic to serve as a spring yet sufficiently rigid to
ensure proper mechanical behaviour in the screed or load distribution surface. The insulating material’s spring effect
is characterised by its dynamic stiffness.
Supplementary actionIf it is impossible to handle the noise when emitted, systems should be used to limit direct noise transmission (floor
underlay) and indirect noise transmission (vertical wall cladding). The best result is achieved by combining both actions.
Recommended action
Direct treatment of floor insulation
Further action
Direct and indirect treatment (ceiling and walls)
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MORE INFORMATION
ACOUSTIC CORRECTIONAs well as reducing sound transmission through a partition,
it may be useful to reduce or control sound propagation
within a room.
This is the role of acoustic correction. This uses the
sound absorption concept to reduce the amount of sound
reflected by the surrounding partition.
Acoustic correction reduces reverberation and so controls
the sound level and optimises listening quality throughout
the room (classroom, for example) and improves speech
intelligibility.
Absorption coefficientThe absorption of insulating materials is characterised by an
absorption coefficient, rated αw. This coefficient is between 0 and 1.
Nonabsorbent partition
Absorbent partition
Emitted noise
Reflected noise
mm
4,0
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2,0
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1,00
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500
250
125
f(Hz)
100 mm Isofaçade 32
0,3
0,6
0,9
1,2
1,5
αw is a single coefficient that takes into account all frequencies and is deduced from the absorption measurements at various frequencies, in accordance with the NF EN ISO 354 standard. These frequency-related measurements are rated αs (Alpha Sabine) to avoid confusion and can take values greater than 1. The calculation of αw is described in the NF EN ISO 11654 standard.
> The closer αw is to 1, the more absorbent the material. On the contrary, the closer αw is to 0, the less absorbing
the material — in other words, the more it reflects noise in the room.
> ISOVER glass mineral wool, which is inherently porous, is an excellent sound absorbent material. Rigid insulating
materials or surfaces have lower absorption coefficient.
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> The presence of glass wool behind cladding of which more than 20% consists in perforations offers an effective
acoustic solution for providing acoustic correction, due to the high absorption coefficient of the wool (nearly 1).
To be more specific, the sound absorption of porous materials depends
on many parameters:
Thickness: a greater thickness will have a significant positive effect upon
the absorption of low frequencies
Material airflow resistance: a higher AFr value will significantly increase absorption
Material porosity and structure: the characteristics of mineral wool including non-fiberized
content will be worse than those of mineral wool not including such particles.
Equivalent absorption areaThe equivalent absorption area defines the absorbing power of a room and is expressed in m2.
The higher this value, the more the room’s walls absorb sound energy and the less the room echoes.
This area is calculated from the different wall surface areas multiplied by their respective sound absorption coefficients.
A = ∑Si.αi
Staircase surface area to treat
Absorption area fixed by the regulations (1/4 of the floor area in collective housing)
Absorption coefficient αW of the insulating
material used
Equivalent area of absorbent insulating
material to be used
20 m2 5 m2 (1/4 of 20 m2) 0,2 25 m2 (i.e., 5/0.2)
20 m2 5 m2 (1/4 of 20 m2) 0,9 5,5 m2 (i.e., 5/0.9)
Reverberation time
A room’s resonance effect is represented by the reverberation time. This time, noted Tr, is the time needed for the
power of a noise to decrease by 60 dB from its initial value.
As a result, the more the room
contains absorbing materials,
the shorter the reverberation time.
Reverberation time (Tr)
TIME(s)
LEVEL (dB)
60 dB
ABSORBING OF SOUND EMITTED BY THE SOURCE
This reverberation time:
varies depending on the frequencies.
increases with the room’s volume.
decreases when the absorption area increases
(furnished or unfurnished room).
decreases when the absorption of the materials
increases (room with or without carpet).
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The reverberation time is linked to the room volume and equivalent absorption area. In the case of simple room : Tr = 0.16.V/A where V is the volume of the room and A is the equivalent absorption area of its walls.
For example: a 75 m3 room with a 10 m2 equivalent absorption area => Tr = 0.16*75/10 = 1.2 s
Index summary
A moderate reverberation time (of around a second) provides good speech intelligibility
and comfortable listening. Its ideal value will therefore depend on the intended use of the room.
Regulatory values are defined for certain types of buildings (healthcare or educational institutions, for example).
Acoustic correction of buildings
Weighted absorption coefficient αw
Room equivalent absorption area A in m2
Reverberation time Tr in seconds
Activity Typical Reverberation time
Bedroom or lounge 0.6 s
Recording studio 0.25 s to 0.9 s
Classroom or courtroom 0.5 s to 1.2 s
Office (open-plan) 0.6 s
Cinema 0.8 s to 1.2 s
Multipurpose hall 1 s to 1.5 s
Church or cathedral 2 s to 4 s
Before beginning any project, certain simple questions must be considered in the case
of both new and renovation sound insulation projects.
Building structure
It is essential to consider the dimensions of floors, including the additional thickness of the implemented acoustic
treatment solution, as early as the overall preliminary project stage.
The acoustic performance of floors is fixed for the entire life of the building. The solutions you choose can no
longer be modified, particularly in the case of new buildings. Once built, the ceiling height — which is often 2.5 m
in residential premises — can no longer be changed.
1. Take into account the nature of the noises involved (impact noise, internal and external airborne noise and
equipment noise)
2. Take into account direct and indirect noise transmission
3. Insulate the rooms by means of suitable sound insulation solutions for the construction context
4. Handle acoustic comfort within a room by means of suitable acoustic correction solutions
New buildings
1. Check the regulations applicable to the rooms to be treated
2. Aim for performance levels that exceed the actual requirements in order to take into account lateral losses
and ensure occupant comfort
3. Choose the construction principles according to the required performance levels and building structure
4. Define the most suitable system for each wall
24 BUILDING ACOUSTICS BASICS
BU
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SOUND INSULATION SOLUTION
Renovated buildings
1. Identify the nature of the noise (airborne noise coming from within or outside the building, impact noise
or equipment noise)
2. Identify the walls to treat for noise transmission
3. Identify their nature: which material, and which joints with adjoining walls
4. Choose the insulation solution best suited to the objectives by referring to the regulations for new buildings
and choosing systems whose attenuation index Rw exceeds the desired insulation level by 5 dB in order to take
lateral losses into account and ensure occupant comfort
> Note: It is recommended to choose insulation solutions having proven performances, such
as any ISOVER insulation solution
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REPUBLIC OF IRELAND 28
NORTHERN IRELAND 30
ACOUSTIC REGULATIONS
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ACOUSTIC REGULATIONS
REGULATIONS, CODES & CERTIFICATIONS
IntroductionAcoustic regulations vary according to building type, as well as in terms of location (Republic of Ireland’s regulations differ to
those in Northern Ireland). Here is a useful summary of the regulations that are in place for residential building for both Republic
of Ireland and Northern Ireland.
Sound
T e c h n i c a lG u i d a n c e
D o c u m e n t
E
Environment, Community and Local GovernmentComhshaol, Pobal agus Rialtas Áitiúil
Bui ldingRegulat ions
2014
REPUBLIC OF IRELAND ✔ Part E (Resistance to the passage of sound), came into
effect from July 1st
✔ Requires all separating walls and floors to demonstrate
their compliance by successfully passing on-site testing
on their respective projects
✔ Requirements of BCAR contractors require sufficient test
evidence prior to specification
✔ Unlike the regulations for England and Northern Ireland,
there is no provision in the regulations for the adoption of
‘Robust Details’ to avoid on-site testing or provision to use
them as demonstration of a compliant solution.
✔ There is however a provision within the regulations to bring
the number of tests required on site to the same level as the
systems outlined in the TGD once it can be demonstrated
that the solution has successfully shown compliance on 30
separate tests (Table B1 below) undertaken across at least
two different project locations.
✔ Once achieved the system can be registered (not sure with
who) as an ‘Assessed Sound Detail’ (ASD). Once registered
we could promote a solution without having to impose
additional testing requirements on the customer.
✔ Tables 3A and 3B below highlight the differences in testing
requirements between solutions identified in the regulations
(3A) and those that are not (3B)
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Republic of Ireland required sound performance levels - New Build
Republic of Ireland minimum frequency of testing per group or sub-group type
Republic of Ireland other constructions - minimum frequency of testing per group or sub-group type
Republic of Ireland other constructions - minimum frequency of testing per group or sub-group type
Separating construction Airborne sound insulation DnT.w dB Impact sound insulation L3nT.w dB
Walls 53 (min) -
Floors (including stairs with a separating function)
53 (min) 58 (max)
Number of attached dwellings ‘Sets of tests’ required
4 or less At least 1
Greater than 4 but less than or equal to 20 At least 2
Greater than 20 but less than or equal to 40 At least 2 + 10% x No. of attached dwellings greater than 20
Greater than 40 but less than or equal to 100 At least 4 + 5% x No. of attached dwellings greater than 40
More than 100 At least 7 + 5% x No. of attached dwellings greater than 100
Number of attached dwellings ‘Sets of tests’ required
First 8 dwellings (or part thereof) planned for completion
At least one ‘set of test’ for each separating element up to 4 No. ‘sets of tests’
Greater than 8 but less than or equal to 20 At least 6 (in total)
Greater than 20 but less than or equal to 40 At least 6 + 10% x No. of attached dwellings greater than 20
Greater than 40 but less than or equal to 100 At least 8 + 5% x No. of attached dwellings greater than 40
More than 100 At least 11 + 5% x No. of attached dwellings greater than 100
Min number of individual tests
Min number of sites Max number of tests per site Min number of test bodies
30 2 16 2
Resistance to the passage ofsound
Techn i c a lBook le t G
October 2012
Finance andPersonnel
Department of
www.dfpni.gov.uk
Building Regulations (Northern Ireland) 2012
Gu i d anceNORTHERN IRELAND ✔ Robust details outline acceptable builds for relevant
acoustic applications (party wall, floors, partitions),
without the need for on-site testing.
✔ Any deviation from the standard robust details
must undergo testing to prove that the required
standard was met.
✔ Contractors can register each project they are working on
with the Robust Details body. The approved spec for each
relevant application will then be sent out to ensure the
relevant standard is met.
REGULATIONS, CODES & CERTIFICATIONS
IntroductionNorthern Ireland’s acoustic regulations are outlined in Technical Booklet G. These regulations are put into place
in a series of specifications known as ‘robust details’.
Northern Ireland dwellings Performance standards for separating walls, separating floors, and stairs that have a separating function.
Airborne sound insulation DnT.w dB + CtrdB (minimum values)
Impact sound insulation L3nT.w dB
(maximum values)
New dwellings
Walls 45 -
Floors and stairs 45 62
Dwellings formed by material change of use
Walls 43 -
Floors and stairs 43 64
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Northern Ireland Rooms for residential purposes Performance standards for separating walls, separating floors, and stairs that have a separating function.
Airborne sound insulation DnT.w dB + CtrdB (minimum values)
Impact sound insulation L3nT.w dB
(maximum values)
New Rooms for residential purposes
Walls 43 -
Floors and stairs 45 62
Rooms for residential purposes formed by material change of use
Walls 43 -
Floors and stairs 43 64
NEED REGULATORY ADVICE?
Contact our technical team:ROI: 1800 744 480NI: 0845 399 [email protected]
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SUSTAINABLE INSULATION SOLUTIONS
LOSING HEAT THROUGH YOUR WALLS? The best solution is Optima Drylining System. Watch our “OPTIMA” movie to find out more!
LOCK IN HEAT, LOCK OUT DRAUGHTS WITH VARIO RANGE! Learn more about our airtight and moisture control solution on ISOVER.ie
LOOKING TO INSULATE YOUR ATTIC? View our “How to Insulate” movie and step by step guide!
CONVERTING YOUR ATTIC? Check out the “Metac” movie!
32 BUILDING ACOUSTICS BASICS
NEED HELP? DO YOU HAVE A QUESTION? Contact our technical team:ROI: 1800 744 480NI: 0845 399 [email protected]
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34 BUILDING ACOUSTICS BASICS
SEPARATING PARTY WALLS
TIMBER FRAME TWIN LEAF CONSTRUCTION 38
METAL STUD TWIN LEAF CONSTRUCTION 39
MASONRY SINGLE LEAF CONSTRUCTION 40
OTHER CONSTRUCTION TYPES 41
PARTITIONS
INTERNAL PARTITIONS METAL STUDS 42
INTERNAL PARTITION TIMBER STUDS 43
FLOORS
SEPARATING FLOORS TIMBER 44
INTERNAL FLOORS TIMBER 45
ISOVER PRODUCTS 46
ACOUSTIC APPLICATIONS & PRODUCT GUIDE
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APPLICATIONS AND PRODUCT GUIDE
Walls Walls Walls Walls Floors Metallic Buildings
Product name Thermal Conductivity W/mK
External & Separating Internally Insulated Partition Separating Internal & Separating Floors Metallic Buildings
Spacesaver Plus Roll
0.040 ✔ ✔ ✔ ✔
Modular Roll 0.043 ✔ ✔ ✔
Acoustic Roll 0.036 ✔ ✔ ✔ ✔ ✔
Acoustic Batt 0.036 ✔ ✔ ✔ ✔ ✔
Calibel Board 0.034 ✔ ✔
Cavity Fire Barriers ✔
Sound Deadening Floor Slab ✔
36 BUILDING ACOUSTICS BASICS
Our products are independently lab tested
in application to ensure performance
Walls Walls Walls Walls Floors Metallic Buildings
Product name Thermal Conductivity W/mK
External & Separating Internally Insulated Partition Separating Internal & Separating Floors Metallic Buildings
Spacesaver Plus Roll
0.040 ✔ ✔ ✔ ✔
Modular Roll 0.043 ✔ ✔ ✔
Acoustic Roll 0.036 ✔ ✔ ✔ ✔ ✔
Acoustic Batt 0.036 ✔ ✔ ✔ ✔ ✔
Calibel Board 0.034 ✔ ✔
Cavity Fire Barriers ✔
Sound Deadening Floor Slab ✔
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SHERO SOLUTION
+ +
Timber Frame Twin leaf construction
70db reduction
1 Two frameworks of timberstud
2 ISOVER insulation (fully filled for zero U-value)
3 Vario membrane + tapes
4 2 x Gyproc plasterboard
5 300mm wide ISOVER Cavity Fire Barrier
1
2
3
4
5
Vario SystemAcoustic Roll Cavity Fire Barrier
Insulation Gyproc Plasterboard
Lab sound insulation 100 - 3150 Hz, Rw dB
Fire Resistance (mins.)
Overall thickness (mm)
50mm ISOVER Acoustic Roll 19mm Gyproc Plank + 12.5mm Gyproc WallBoard Premium
* 60 250
25mm ISOVER Acoustic Roll19mm Gyproc Plank + 12.5mm Gyproc WallBoard Premium
63 60 293
50mm ISOVER Acoustic Roll & 100mm ISOVER Spacesaver Plus (Compressed to fit in stud cavities).
19mm Gyproc Plank + 12.5mm Gyproc Fireline
70 60 253
* Isover insulation used in conjunction with Gyproc plasters & plasterboards meet the requirements of the guidance for Separating Wall Type 4 as per examples given in Northern Ireland Building Regulations Technical Booklet G 2012. Pre-Completion Testing is required when specifying Building Regulations Technical Booklet G Guidance Constructions.
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Metal Stud Twin leaf construction
Overall construction nominal width 250mm
1 2 x 15mm Gyproc SoundBloc
2 Isover Vario membrane + tapes
3 Two frameworks of Gypframe 60 I 50 ‘I’ Stud at 600mm centres
4 Isover Acoustic Roll in the cavity
Vario SystemAcoustic Roll
Insulation Gyproc PlasterboardLab sound insulation 100 - 3150 Hz, Rw dB
Fire Resistance (mins.)
Overall thickness (mm)
50mm ISOVER Acoustic Roll
15mm Gyproc SoundBloc 66 (Rw dB) 58 (Rw + ctr)* 60 200
100mm ISOVER Acoustic Roll
15mm Gyproc SoundBloc 70 (Rw dB) 62 (Rw + ctr)* 90 250
* Isover insulation used in conjunction with Gyproc plasters & plasterboards can meet the requirements of the guidance for Separating Walls in Northern Ireland Building Regulations Technical Booklet G 2012. The above are based on GypWall Quiet IWL systems PSR. No. A216013 & A216014 designed to achieve the minimum DnTw + Ctr 45 subject to pre-completion testing.
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4
1
2
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215mm block on flat
1 215mm solid block
2 Gyproc Compound dabbed
3 ISOVER Calibel Board
Masonry Single leaf construction
2
1
3
Product Wall type Db Reduction
42.5mm Calibel Board receiver side 215 dense concrete block 54
42.5mm Calibel Board both sides 215 dense concrete block 56
42.5mm Calibel Board both sides + additional 8mm to 12mm base coat of sand and cement
215 dense concrete block 59
**Although the above figures are based on site tests, design and sit conditions may vary. In addition testing is still mandatory under the regulations.
Calibel Board
HERO SOLUTION
59db reduction
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1 15mm external render
2 200mm concrete
3 13mm Gyproc internal plaster
4 Optima metal studs and fixings
5 ISOVER insulation
6 Vario membrane + tapes placed on studs
7 Gyproc WallBoard
OR OR
Other Construction Types
Optima Comfort Panel 32 Comfort Roll 35 Metac Roll Vario System
2
1
3
6
74
5
* This level of sound insulation performance is based on a construction comprising the described base construction only. Any compound elements to the overall construction, e.g. windows, doors etc., will result in a significant reduction in the overall performance.
Base Construction
Thickness of ISOVER insulation with AFr ≥ 5 kPa.s/m2
Board Lining
In-situ Sound Insulation Performance, dB R’w Gain in Sound
Insulation Performance, dBBase
Construction
Base Construction + OPTIMA
215mm solid blocks with 12.5mm sand/cement render on both sides
50mm12.5mm Gyproc WallBoard
54
63 9
100mm 64 10
160mm 65 11
200mm precast concrete(diagram above)
50mm12.5mm Gyproc WallBoard
55
64 9
100mm 65 10
160mm 66 11
215mm concrete block
50mm12.5mm Gyproc WallBoard
53
65* 12
100mm 66* 13
160mm 67* 14
Two leaves of 100mm dense concrete blocks with 100mm cavity
50mm12.5mm Gyproc WallBoard
58
67* 9
100mm 68* 10
160mm 68* 10
**Although the above figures are based on site tests, design and sit conditions may vary. In addition testing is still mandatory under the regulations.
42 BUILDING ACOUSTICS BASICS
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1 12.5mm Gyproc plasterboard
2 ISOVER Acoustic Roll / Batt
3 70mm Gypframe metal studs
4 12.5mm Gyproc plasterboard
One layer of 12.5mm Gyproc plasterboard each side of GypFrame metal studs at 600mm centres, with ISOVER insulation within the cavity.
Internal Partitions Metal studs
1
2
3
4
Insulation Gyproc Plasterboard Lab sound insulation 100 - 3150 Hz, Rw dB
Fire Resistance (mins)
Metal stud thickness (mm)
25mm ISOVER Acoustic Roll*
12.5mm Gyproc WallBoard Premium
** 30 70
25mm ISOVER Acoustic Roll*
12.5mm Gyproc SoundBloc 45 30 70
50mm ISOVER Acoustic Roll*
12.5mm Gyproc SoundBloc 47 30 70
50mm ISOVER Acoustic Roll*
2 x 12.5mm Gyproc SoundBloc 53 60 70
70mm ISOVER Acoustic Roll
12.5mm WallBoard 43 - 70
* ISOVER recommends full filling of metal stud with acoustic insulation for optimum performance** ISOVER Acoustic Roll used in conjunction with Gyproc Wallboard Premium meets the requirements of the guidance for
Internal wall type B as per examples given in Northern Ireland Building Regulations Technical Booklet G 2012.
OR
Acoustic Roll Acoustic Batt
Internal Partition Timber studs
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Internal Partitions Metal studs
ISO
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1 12.5mm Gyproc plasterboard
2 ISOVER Acoustic Roll / Batt
3 75 x 38mm timber studs
4 12.5mm Gyproc plasterboard
A partition wall constructed from one layer of 12.5mm Gyproc plasterboard each side of timber studs at 600 mm centres, with ISOVER
insulation within the cavity
Internal Partition Timber studs
Insulation Gyproc Plasterboard Lab sound insulation 100 - 3150 Hz, Rw dB
Fire Resistance (mins)
Timber stud thickness (mm)
25mm ISOVER Acoustic Roll*
12.5mm Gyproc WallBoard Premium
** 30 75
25mm ISOVER Acoustic Roll*
12.5mm Gyproc SoundBloc 40 30 75
25mm ISOVER Acoustic Roll*
2 x 12.5mm Gyproc SoundBloc 46 60 75
50mm ISOVER Acoustic Roll
12.5mm Gyproc WallBoard 39 - 70
50mm ISOVER Metac Roll 12.5mm Gyproc WallBoard 41 - 70
* ISOVER recommends full filling of metal stud with acoustic insulation for optimum performance** ISOVER Acoustic Roll used in conjunction with Gyproc Wallboard Premium meets the requirements of the guidance for
Internal wall type B as per examples given in Northern Ireland Building Regulations Technical Booklet G 2012.
1
2
3
4
OR
Acoustic Roll Acoustic Batt
44 BUILDING ACOUSTICS BASICS
FLO
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Internal Floors Timber
1 18mm Tongue & Groove wood board flooring
2 19mm Gyproc Plank
3 25mm ISOVER Sound Deadening Floor Slab
4 12mm wood sub base
5 Minimum 100mm ISOVER Acoustic Roll
6
Casoline MF ceiling suspended beneath joists to give a minimum 277mm cavity, lined with a double layer of 15mm Gyproc SoundBloc
Separating Floors Timber
1
2
3
4
5
6
Insulation Gyproc Plasterboard Lab sound insulation 100 - 3150 Hz, Rw dB
Fire Resistance (mins.)
Overall floor depth (mm)
100mm ISOVER Acoustic Roll
12.5mm Gyproc Soundbloc
66 Rw dB (airborne) 50 Lnw dB (impact)*
30 376
100mm ISOVER Acoustic Roll
15mm Gyproc SoundBloc
66 Rw dB (airborne) 54 Lnw dB (impact)*
60 381
* ISOVER insulation used in conjunction with Gyproc plasters and plasterboards meet the requirements of the guidance for Separating Floor Types as per examples given in Northern Ireland Building Regulations Technical Booklet G 2012. Pre-Completion Testing is required when specifying Building Regulations Approved Technical Booklet G Guidance Constructions.
Acoustic Roll Vario System
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1 Walking surface with a minimum surface mass 15kg/m2
2 100mm ISOVER Acoustic Roll*
3 12.5mm Gyproc Wallboard Premium
Internal Floors Timber
Separating Floors Timber
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* Isover Acoustic Roll used in conjunction with Gyproc WallBoard Premium meets the requirements of the guidance for Internal floor type C as per examples given in Northern Ireland Building Regulations Technical Booklet G 2012.
Acoustic Roll Sound Deadening Floor Slab
46 BUILDING ACOUSTICS BASICS
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ISOVER Calibel Board Achieve up to 59db noise reduction
PRODUCT FEATURES
✔✔ Thermal conductivity 0.035 W/mK for the insulation
✔✔ Excellent acoustic performance
✔✔ Excellent fire safety
✔✔ Vapour permeable breathable insulation
✔✔ Improves energy performance and reduces heating &
cooling costs
✔✔ Easy to install
✔✔ Made from recycled glass. Minimal manufacturing and
on-site wastage. Low carbon footprint at manufacture
and during transport
W/mK 0.034
Walls - Internally insulated Walls - Separating
Product Thickness (mm) Width (m) Length (m) Board Area (m2) Boards Per Pallet
Calibel G3 Touch 42.5 2.5 1.2 3 27
Calibel G3 Touch 62.5 2.5 1.2 3 18
PRODUCT DESCRIPTION Calibel is an insulation board made up of a thick base of glass mineral wool assuring excellent thermal, acoustic and mechanical insulation, finished with a plasterboard lining.
ISOVER Acoustic Roll High Acoustic Performance
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SPRODUCT DESCRIPTION A glass mineral wool roll providing high levels of acoustic insulation in partitions, walls and floors to meet acoustic requirements in domestic and non-residential applications.
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PRODUCT FEATURES
✔✔ Thermal conductivity 0.036 W/mK
✔✔ Excellent acoustic performance
✔✔ Excellent fire safety - A1 fire rated
✔✔ Vapour permeable breathable insulation
✔✔ Improves energy performance and reduces heating &
cooling costs
✔✔ Easy to install. Friction fits between timber studs/joists
✔✔ Made from recycled glass. Minimal manufacturing and
on-site wastage. Low carbon footprint at manufacture
and during transport
ISOVER Acoustic Roll High Acoustic Performance
Product Thickness (mm) Width (mm) Length (mm) Pack area (m2) Sheets per
pallet
ISOVER Acoustic Roll 25 1200 20000 24 24
ISOVER Acoustic Roll 50 1200 12000 14.40 24
ISOVER Acoustic Roll 70 1200 9000 10.80 24
ISOVER Acoustic Roll (Combi) 100 1160 6500 7.54 24
ISOVER Acoustic Roll (Combi) 150 1160 4500 5.22 24
ISOVER Acoustic Roll (Combi) 200 1160 2700 3.13 24
Pitched Roof - Attics Walls - Partition Floors - Floating - Under/Between
W/mK 0.036
48 BUILDING ACOUSTICS BASICS
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PRODUCT FEATURES
✔✔ Thermal conductivity 0.036 W/mK
✔✔ Excellent acoustic performance
✔✔ Excellent fire safety - A1 fire rated
✔✔ Vapour permeable breathable insulation
✔✔ Improves energy performance and reduces heating &
cooling costs
✔✔ Easy to install
✔✔ Made from recycled glass. Minimal manufacturing and
on-site wastage. Low carbon footprint at manufacture
and during transport
ISOVER Acoustic Batt
Product Thickness (mm)
Width (mm)
Length (mm) Pack area (m2) Sheets per pallet Pack per pallet
ISOVER Acoustic Batt
50 600 1200 16 11.52 20
ISOVER Acoustic Batt
75 600 1200 10 7.20 20
ISOVER Acoustic Batt
100 600 1200 8 5.76 20
W/mK 0.036
Pitched Roof - Attics Walls - Partition Walls - Internally insulated
ISOVER Sound Deadening Floor Slab
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SPRODUCT DESCRIPTION A mineral wool slab designed to provide impact sound deadening performance in timber base separating floors.
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PRODUCT FEATURES
✔✔ Excellent acoustic performance
✔✔ Excellent fire safety - A1 fire rated
✔✔ Vapour permeable breathable insulation
✔✔ Improves energy performance and reduces heating &
cooling costs
✔✔ Easy to install
✔✔ Made from recycled glass. Minimal manufacturing and
on-site wastage. Low carbon footprint at manufacture
and during transport
ISOVER Sound Deadening Floor Slab
Product Thickness (mm)
Width (mm)
Length (mm) Batt per pack Pack area (m2) Pack per pallet
ISOVER Sound Deadening Floor Slab - Rigid Grade
25 625 1200 8 6 n/a
Floors - Floating - Under/Between
50 BUILDING ACOUSTICS BASICS
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PRODUCT FEATURES
✔✔ Thermal Conductivity 0.040 W/mK.
✔✔ Excellent Acoustic Performance.
✔✔ Excellent Fire Safety - A1 Fire Rated.
✔✔ Vapour permeable breathable insulation.
✔✔ Improves energy performance and reduces heating
& cooling costs.
✔✔ Friction fits between timber joists /rafters. Easy to install.
✔✔ Made from recycled glass. Minimal manufacturing and
on-site wastage. Low carbon footprint at manufacture
and during transport.
ISOVER Spacesaver Plus Increased Thermal Performance
Product Thickness (mm) Width (mm) Length (mm) Pack area (m2) Pack per pallet
ISOVER Spacesaver Plus 100 1160 7000 8.12 24
ISOVER Spacesaver Plus 150 1160 4670 5.42 24
ISOVER Spacesaver Plus 200 1160 3500 4.06 24
Pitched Roof - Attics
W/mK 0.040
ISOVER Ireland Unit 4, Kilcarbery Business Park,
Nangor Road, Dublin 22 Tel: +353 (0)1 6298400
Email: [email protected] www.isover.ie