Technical
Booklets G and G1 - ‘Sound’ 1990 and ‘Sound conversions‘ 1994
(Northern Ireland)
How to comply
There are three routes to compliance
1. Specified constructions
Adopting and constructing details specified in Technical
booklets G and G1
2. Performance testing
Performance testing built constructions to show compliance with
performance standards shown in table 12.
3. Repeat constructions
Duplicate a construction that has been built elsewhere and has
already been tested to show compliance.
Table 12: Performance standards for Northern
Ireland
|
Airborne sound insulation
Dn T,w dB*
|
Impact sound insulation
L'n Tw dB
|
| |
mean values |
individual
value |
mean values |
individual
value |
| Separating walls |
53 |
49 |
- |
- |
| Separating floors and stairs |
52 |
48 |
61 |
65 |
* As defined in BS EN ISO 717-1: 1997