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)

EI 15

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

Soundproofing

(35 dB)

EI 30

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

Soundproofing

(40 dB)

EI 45

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

Soundproofing

(44 dB)

EI 60

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

Soundproofing

(48 dB)

EI 90

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

Soundproofing

(52 dB)

EI 90

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

Soundproofing

(56 dB)

EI 120

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

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

Passive Slab

Passive Slab is Passive House certified to deliver the lowest U-value (as low as 0.08W/m.K) on the market and eliminates the critical wall-floor Cold Bridge. Read More

Cellulose Insulation

Cellulose insulation is made from recycled wood fibre, primarily newspaper. One hundred kilos of cellulose insulation contains 80 to 85 kilos of recycled newsprint. Waste disposal is a major problem for cities. Cellulose unquestionably meets all requirements for insulation specified by the guideline. Read More

Insulated Concrete Forms

ICF Insulated Concrete Forms are formwork for concrete that stay in place as permanent building insulation for energy-efficient, cast-in-place, reinforced concrete walls, floors, and roofs. The forms are interlocking modular units that are dry-stacked (without mortar) and filled with concrete. The forms lock together somewhat like Lego bricks and serve to create a form for the structural walls or floors of a building. Read More

Timber Frame House

Our Timber frame Passive Houses usually arrive on site pre-finished with Cellulose Insulation in the walls and triple glazed Passive House windows fitted. The Timber frame walls can be pre-finished internally, so no wet trades are required on site.Read More

Passive House

Passive Houses are highly insulated, comfortable, cold bridge free structures that require little heating, they usually have triple glazed windows, heat recovery ventilation (HRV) and high air-tightness levels. It doesn’t cost extra to build a Passive House using our construction methods, as money saved on a complex heating system pays for better windows or extra insulation. Read More