|
|
 |
Noise attenuation tests were carried out to EN ISO 140-3:1995 and EN ISO 717-1:1996 (tests carried out at the CSTC).
Tests were carried out on coated and uncoated walls.
The coating used was quite thin (3 - 5 mm), and was specially developed for the Besto® technique. The effect of a traditional plaster coating (10 - 15 mm) was also measured. |
| Coating on 1st wall face |
Coating on 2nd wall face |
Insulation |
Vertical joints |
Attenuation : Rw (dB) |
| 9 cm wall |
| no |
no |
- |
open |
29 |
| thin |
no |
- |
open |
39 |
| thin |
thin |
- |
open |
40 |
| 14 cm wall |
| no |
no |
- |
open |
25 |
| thin |
no |
- |
open |
43 |
| thin |
thin |
- |
open |
44 |
| thick |
thick |
- |
open |
45 |
| no |
no |
- |
closed |
26 |
| thin |
thin |
- |
closed |
44 |
| 19 cm wall |
| no |
no |
- |
open |
29 |
| thin |
thin |
- |
open |
47 |
| 29 cm wall |
| no |
no |
- |
open |
30 |
| thin |
thin |
- |
open |
51 |
| double 14 cm wall - insulated |
| no |
no |
glass wool - 7 cm |
open |
41 |
| thin |
thin |
glass wool - 7 cm |
open |
52 |
| double 14 cm wall (assembled on separate flags) - insulated |
| no |
no |
glass wool - 8,5 cm |
open |
42 |
| thin |
thin |
glass wool - 8,5 cm |
open |
73 |
|
|
|
| Belgian categories (NBN S01-400:1977) and single values (EN ISO 717:1996) |
NBN category |
Attenuation Rw(dB) |
Ia
|
> 62
|
| Ib |
> 57 et < 62 |
| IIa |
> 54 et < 57 |
| IIb |
> 49 et < 54 |
| IIIa |
> 45 et < 49 |
| IIIb |
> 40 et < 45 |
| IVa |
> 35 et < 40 |
| Ivb |
> 30 et < 35 |
|
|
| |
|
|
|