SoundPro solutions for internal floors
New build, E2
The Approved Document E introduces performance criteria for internal walls and floors. This is based on laboratory rating (Rw) for which a minimum value for airborne sound insulation of Rw 40dB is required.
ADE Section 5 internal floor type C gives examples of internal timber or metal joist floor constructions which should achieve this value.
ADE Construction guidance
Specifications for internal timber or metal joisted floors:
Rw 40dB
- Timber or wood based floor of min. mass per unit area 15Kg/m2 (eg 22mm chipboard)
- Timber or metal floor joists @ 400mm ctrs.
- Min. 100mm thick mineral wool between joists (Rockwool Flexi)
- Single layer plasterboard, min. mass per unit area 10Kg/m2 (eg 15mm standard wallboard)
| | Building Elements | NBS Plus Clause | ||
| Rockwool Flexi | Intermediate timber floors | P10-240 | ||
| Intermediate metal floors | K11-215 K11-225 | K11-235 K11-245 | ||
