Soundproofing Partition walls

Partition walls and floors can be insulated to allow for extra privacy between rooms (and at the same time for better fire safety). By sound class, we mean the sound insulation (dB) that can be expected between the spaces where the separating structure is used. The laboratory recorded measurements of the construction solutions below are at least 3 dB below the stated values.

Table

Examples of how different activities can be heard at different dB (sound insulation values) between the rooms.

Clearly audible
Audible

dB	Normal Speech	Loud Speech	Shouting	TV, Radio Normal level	TV, Radio, High level	TV, Radio, Extreme level	Example of Rooms
30							Office
35							Office
40							Schools
44							Schools
48							Schools
52*							Apartments
56							Apartments
60							Spec. rooms
60							Spec. rooms

* Recommended for rooms where privacy is required

Sound class dB

Fire class

Soundproofing

(30 dB)

13 mm plaster board
70 mm wooden stud approx. c 600 mm
13 mm plaster board

EI 15

Soundproofing

(35 dB)

13 mm plaster board
70 mm wooden stud approx. c 600 mm
70 mm Dense Mineral wool
13 mm plaster board

EI 30

Soundproofing

(40 dB)

13 mm plaster board
95 mm wooden stud approx. c 600 mm
95 mm Dense Mineral wool
13 mm plaster board

EI 45

Soundproofing

(44 dB)

2 x 13 mm plaster board
45 x 95 mm wooden stud approx. c 600 mm
35 mm Dense Mineral wool
2 x 13 mm plaster board

EI 60

Soundproofing

(48 dB)

2 x 13 mm plaster board
120 mm wooden stud approx. c 600 mm
120 mm Dense Mineral wool
2 x 13 mm plaster board

EI 90

Soundproofing

(52 dB)

2 x 13 mm plaster board
2 x (45 x 45 mm wooden stud) approx. c 600 mm
20 mm air gap between the studs
95 mm Dense Mineral wool
2 x 13 mm plaster board

EI 90

Soundproofing

(56 dB)

2 x 13 mm plaster board
2 x (45 x 70mm wooden stud) approx. c 600 mm
20 mm air gap between the studs
145 mm Dense Mineral wool
2 x 13 mm plaster board

EI 120

Partition timber floor

By using a 20mm Mineral Wool board or Wood-fibre board (white) between 2 layers of OSB the sound through a timber floor can be reduced to half. The Mineral wool slab (white) is placed on the construction floor, and another layer of board is placed cross wise on top of it. The double layer of plasterboard combined with the de coupling effect of the metal profiles reduces the sound through the roof by a further 10 dB.

Soundproofing

Floor covering/Carpet
OSB/Plywood
20mm of Dense Mineral wool board or Wood-fibre board
OSB/Plywood Construction layer
Joists with Dense Mineral wool between
Metal Top hat profiles
Double layer of Plasterboard ceiling