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Except in very special situations, mass is still the best defence against noise penetration. One of the main advantages of brickwork is an ability to provide such mass together with structural strength, and so brick walls provide a very good way of insulating against sound. The quality of sound insulation does not vary much from brick type to brick type, and so it is possible to generalise about sound reduction values.
Method of Construction |
Average Sound Reduction in dB |
110 mm unplastered wall |
42 |
110 mm wall plastered both sides |
45 |
220 mm wall plastered both sides |
50 |
Cavity wall construction |
50 |
330 mm Solid wall |
53 |
The potential value of a good sound barrier is lost if noise can be readily transferred by an alternative route, typical examples of which include:
Considerable reduction in sound insulation value occurs even through quite small cracks or openings and typical examples of this would include:
BERTS BRICKS |
MOLOPO BRICKS |
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