Sound Transmission Building Codes & Rules

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SOU 4

Non-habitable

2 or 3

Carpark

SOU 3

Public space

Corridor

Bath

Rw +

Ctr 25

Habitable

5 or 6

Plant

SOU 2

Kitchen

Lift

Living or Sleeping

Non- Habitable

Kitchen, Bath or Laundry

Habitable

Discontinuous Construction

2 or 3

NCC 2022 Vol 1, F7D8

Pumps^{NCC 2022 Vol 1, F7D8}

Flexible coupling at point of connection to building

Informative

Noise Source^Informative

Road
Rail
Industry

Informative

Block out noise^Informative

Heavy Insulation
Thicker or Double Glazing
Mechanical Ventilation

Informative

Buffer habitable spaces through design^Informative

(Acoustic Consultant input may be required)

Public areas
Kitchens / Bathrooms
Services / Utility

NCC 2022 Vol 1, F7D7 (2)

Stormwater^{NCC 2022 Vol 1, F7D7 (2)}

Separated if passes through SOU

NCC 2022 Vol 1, F7D7 (1) (a)

Ctr 40^{NCC 2022 Vol 1, F7D7 (1) (a)}

NCC 2022 Vol 1, F7D7 (1) (b)

Ctr 25^{NCC 2022 Vol 1, F7D7 (1) (b)}

NCC 2022 Vol 1, F7D7 (1)

Internal Services^{NCC 2022 Vol 1, F7D7 (1)}

Servicing or passing through more than 1 SOU

NCC 2022 Vol 1, F7D7 (1) (a)

Ctr 40^{NCC 2022 Vol 1, F7D7 (1) (a)}

NCC 2022 Vol 1, F7D7 (1) (b)

Ctr 25^{NCC 2022 Vol 1, F7D7 (1) (b)}

NCC 2022 Vol 1, F7D6 (1) (b)

Rw 50^{NCC 2022 Vol 1, F7D6 (1) (b)}

NCC 2022 Vol 1, F7D5 (1)

Rw + Ctr 50^{NCC 2022 Vol 1, F7D5 (1)}

Ln,w ≤ 62^{NCC 2022 Vol 1, F7D5 (1)}

NCC 2022 Vol 1, F7D6 (3)

Rw 45^{NCC 2022 Vol 1, F7D6 (3)}

NCC 2022 Vol 1, F7D6 (2)

Rw 30^{NCC 2022 Vol 1, F7D6 (2)}

NCC 2022 Vol 1, F7D6 (1) (a)

Rw + Ctr 50^{NCC 2022 Vol 1, F7D6 (1) (a)}

NCC 2022 Vol 1, F7D6 (3)

Rw 45^{NCC 2022 Vol 1, F7D6 (3)}

NCC 2022 Vol 1, F7D5 (1)

Rw + Ctr 50^{NCC 2022 Vol 1, F7D5 (1)}

Ln,w ≤ 62^{NCC 2022 Vol 1, F7D5 (1)}

SOU 1

NCC 2022 Vol 1, F7D5 (2)

Rw 45^{NCC 2022 Vol 1, F7D5 (2)}

NCC 2022 Vol 1, F7D6 (1) (b)

Rw 50^{NCC 2022 Vol 1, F7D6 (1) (b)}

NCC 2022 Vol 1, F7D6 (3)

Rw 45^{NCC 2022 Vol 1, F7D6 (3)}

2 or 3

Acoustic Floor

Joints between Concrete Slabs or Panels must be filled solid^[1]

Acoustic Floor RULES

NCC 2022 V1

Class 2 to 9

NCC 2022 F7D5 [2019 F5.4]

NCC 2022 S28C3 [2019 F5.2:2]

May 2023

NCC 2022 Vol 1, S28C3 (2) (b)

NCC 2022 Vol 1, F7D5 (1)

NCC 2022 Vol 1, F7D5 (2)

Concrete Slabs^{NCC 2022 Vol 1, S28C3 (2) (b)}
All joints between concrete slabs or panels & any adjoining construction must be filled solid
Rw + Ctr 50 & Ln,w ≤ 62 in Class 2 or 3^{NCC 2022 Vol 1, F7D5 (1)}
When separating different SOUs, or
SOU from plant room, lift shaft, public areas or parts of a different classification
Rw 45 in Class 9c^{NCC 2022 Vol 1, F7D5 (2)}
When separating SOUs

NCC 2022 Vol 1, S28C3 (2) (b)

Joints between Concrete Slabs or Panels must be filled solid^{NCC 2022 Vol 1, S28C3 (2) (b)}

NCC 2022 Vol 1, F7D5 (2)

Rw 45^{NCC 2022 Vol 1, F7D5 (2)}

2 or 3

Acoustic Wall

Joints between Concrete Slabs or panels must be filled solid^[1]

Acoustic Wall RULES

NCC 2022 V3

All Building Classes

NCC 2022 F7D3 [2019: F5.2]

NCC 2022 S28C3 [2019: F5.2:2]

May 2023

NCC 2022 Vol 1, F7D6 (1) (a)

NCC 2022 Vol 1, F7D6 (3)

NCC 2022 Vol 1, S28C3 (2) (a)

NCC 2022 Vol 1, S28C3 (2) (c)

NCC 2022 Vol 1, S28C3 (2) (d)

NCC 2022 Vol 1, S28C3 (2) (h) (ii)

NCC 2022 Vol 1, S28C3 (2) (h) (i)

Rw + Ctr 50 in Class 2 or 3^{NCC 2022 Vol 1, F7D6 (1) (a)}
Rw 45 in Class 9c^{NCC 2022 Vol 1, F7D6 (3)}
Acoustic sealant to perimeter of Wall
Wall to structure above or acoustic Ceiling
Masonry
All Joints in masonry walls must be filled solid^{NCC 2022 Vol 1, S28C3 (2) (a)}
Sheeting Materials^{NCC 2022 Vol 1, S28C3 (2) (c)}
One layer required on each side
Fastened to the studs with Joints staggered on opposite sides
Two layers required on each side
Second layer fastened over the first
Joints must be taped & filled solid
Timber & Steel-Framed Construction^{NCC 2022 Vol 1, S28C3 (2) (d)}
Frame securely fixed to the adjoining structure
Bedded in resilient compound, or
Joints must be caulked
Electrical Outlets
≥ 300mm separation to GPO's in lightweight Walls^{NCC 2022 Vol 1, S28C3 (2) (h) (ii)}
≥ 100mm separation to GPO's in masonry Walls^{NCC 2022 Vol 1, S28C3 (2) (h) (i)}

NCC 2022 Vol 1, S28C3 (2) (b)

Joints between Concrete Slabs or panels must be filled solid^{NCC 2022 Vol 1, S28C3 (2) (b)}

Discontinuous Construction

Cavity
≥ 20mm^[1][2] & no mounting clips
Plumbing
Fixed to side of cavity it serves^[3]

Discontinuous Construction RULES

NCC 2022 V3

All Building Classes

NCC 2022 F7D4, S28C2, S28C3 [2019 F5]

May 2023

NCC 2022 Vol 1, F7D4 (3)

NCC 2022 Vol 1, S28C2

NCC 2022 Vol 1, S28C3 (2) (g) (i)

NCC 2022 Vol 1, F7D4 (3) (a)

Cavity^{NCC 2022 Vol 1, F7D4 (3)NCC 2022 Vol 1, S28C2}
≥ 20mm separation between two leaves
No mechanical linkage (mounting clips between leaves)
Masonry Walls^{NCC 2022 Vol 1, S28C3 (2) (g) (i)}
Resilient Masonry Ties if required for Wall stability may be used
Plumbing^{NCC 2022 Vol 1, F7D4 (3) (a)}
Fixed to side of Cavity it serves, &
≥ 10mm clear of other leaf
Common plumbing located in Cavity

NCC 2022 Vol 1, F7D4 (3)

NCC 2022 Vol 1, S28C2

NCC 2022 Vol 1, S28C3 (2) (g) (i)

Cavity
≥ 20mm^{NCC 2022 Vol 1, F7D4 (3)NCC 2022 Vol 1, S28C2} & no mounting clips
Plumbing
Fixed to side of cavity it serves^{NCC 2022 Vol 1, S28C3 (2) (g) (i)}