E

Stair treatment: Stair covering and
independent ceiling with absorbent material	58	
Junction requirements for material change
of use						58
Section 5: Internal walls and floors
for new buildings				60
Introduction					60
Doors						60	
Layout						60
Junction requirements for internal walls	60
Junction requirements for internal floors	60
Internal wall type A: Timber or metal
frames with plasterboard linings on
each side of frame				60
Internal wall type B: Timber or metal
frames with plasterboard linings on each
side of frame and absorbent material
Internal wall type C: Concrete block wall,	61
plaster or plasterboard finish on both sides	61
Internal wall type D: Aircrete block wall
plaster or plasterboard finish on both sides	61
Internal floor type A: Concrete planks		62
Internal floor type B: Concrete beams with
infilling blocks, bonded screed and ceiling
Internal floor type C: Timber or metal joist,
with wood based board and plasterboard
ceiling, and absorbent material




Section 6: Rooms for residential
purposes					63
Introduction					63
Separating walls in new buildings
containing rooms for residential purposes	63
Corridor walls and doors			63
Separating floors in new buildings
containing rooms for residential purposes	63
Rooms for residential purposes resulting
from a material change of use			63
Junction details				64
Room layout and building services design
considerations					64
	 
Section 7: Reverberation in the common
internal parts of buildings containing flats
or rooms for residential purposes		65
	 
Introduction					65
Method A					65	
Method B					65


Report format 					66
Worked example 					66
Section 8: Acoustic conditions in schools 	68
Annex A: Method for calculating mass
per unit area 					69
A1 Wall mass					69
A2 Formula for calculation of wall leaf
mass per unit area				69	
A3 Simplified equations				69	
A4 Mass per unit area of surface finishes	70	
A5 Mass per unit area of floors			70
Annex B: Procedures for sound
insulation testing				71
B1 Introduction
B2 Field measurement of sound insulation
of separating walls and floors for the
purposes of Regulation 20A and
Regulation 12A					71
B3 Laboratory measurements			72
B4 Information to be included in test reports 	73
Annex C: Glossary				74
Annex D: References				76
D1 Standards					76
D2 Guidance					76
D3 Other legislation				76

Resistance to the passage of sound   Approved Document E 2