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
	(30 dB) EI 15 13 mm plaster board 70 mm wooden stud approx. c 600 mm 13 mm plaster board
	(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
	(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
	(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
	(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
	(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
	(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.

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