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Detail 2 Detail 3
Upgrade of sound insulation to existing concrete Upgrade of acoustic insulation and fire
floor slab at first floor. protection to existing timber floor between
existing A5 use at ground floor and existing
Unless the Developer can prove that the shell residential use at first floor:
unit floor construction has been designed and N.B. If existing ceiling is lath and plaster, this
constructed as a separating floor in accordance should be supported by chicken wire securely
with the current edition of Approved Document fixed to underside of joists.
E, then the sound insulation is to be upgraded
by Client’s contractor by the provision of: • 50 x 38 timber battens @ 600 centres fixed to
existing soffit
• 50x38mm deep timber cross battens fixed to • 16mm deep British Gypsum RB1 resilient bars
u/s. concrete floor @ 600 centres. @ 400 centres
• 16mm deep British Gypsum RB1 resilient bars • 25mm thick absorbent layer of British
@ 400 centres Gypsum Isover Sound Deadening Floor Roll
• 25mm thick absorbent layer of British within the void.
Gypsum Isover Sound Deadening Floor Roll • 2 layers of 12.5mm Gypsum Fireline board.
within the void.
• One layer of 12.5mm Gyproc Wallboard TEN
(10kg/m²)
2.5.1 Acoustic Ceilings 3 February 2016
