Requirements for separating walls, floors and stairs in dwellings and flats
 

 Airborne Sound Insulation (DnT,w + Ctr dB minimum values)Impact Sound Insulation (L'nT,w dB maximum values)
New Build  

Walls

45

 

Floors & Stairs

45

62

Conversions  

Walls

43

 

Floors & Stairs

43

64


Requirements for separating walls floors and stairs in rooms for residential purposes 

(hostels, hotels, boarding houses, halls of residence or residential homes)

 Airborne Sound Insulation (DnT,w + Ctr dB minimum values)Impact Sound Insulation (L'nT,w dB maximum values)
New Build  

Walls

43

 

Floors & Stairs

45

62

Conversions  

Walls

43

 

Floors & Stairs

43

64

 

Requirements for internal walls, floors, stairs and rooms for residential purposes
 

New Build and Conversions

Airborne Sound Insulation (Rw dB)

Walls

40

Floors & Stairs

40

CTAs: 
980
979