HHSRS VERSION 2
1 (BCC-01)
April 2006
DAMP AND MOULD GROWTH ETC
Yes
Yes
No
No
Vulnerable age
Related hazards
Persons aged 14 years or under
Excessive cold
A - Bedroom
Multiple locations
Secondary hazards
B - Living room
Blocked/Leaking Down-pipe
External Wall
Pointing Detail
DESCRIPTION OF HAZARDS
Dwelling:
Pre 1920 ground floor flat
Background: A self contained ground floor flat within a 2 storey block converted into four flats during
the 1970’s. The original property dates back to 1882. The building was constructed on a natural sand
bed in a low lying area and remains subject to the rise and fall of incoming tides. The external wall
construction is of solid stone. The ground floor flat being considered comprises of a kitchen, bathroom,
living room and one bedroom.
A) Bedroom: rising dampness and mould growth plus penetrative dampness due to missing pointing to
the external face of the external wall and rainwater overspill due to a partially blocked rainwater down-
pipe.
B) Living Room: rising dampness to a height of 1000mm above finished floor level due to a lack of an
effective damp proof course to the walls. All walls of the room show dampness (significantly damp to
the touch) with salted and perished wall plaster and mould growth present.
C) Kitchen: rising dampness evident to the external walls due to the lack of a damp proof course and
missing external pointing. Mould growth present.
LIST OF RELEVANT MATTERS
LIKELIHOOD & OUTCOMES
A
B
C
a
Rising damp
3
3
2
b
Penetrating damp
3
-
2
c
Condensation
-
-
-
d
Mould growth
1
-
1
e
Poor thermal efficiency
-
-
-
f
Background ventilation
-
-
-
g
Kitchen extract vent.
-
-
-
h
Bathroom extract vent.
-
-
-
i
Clothes drying facilities
-
-
-
j
Disrepair to damp proofing
-
-
-
k
Disrepair to floors/walls/roofs
2
-
-
l
Frost protection
-
-
B
C
-
-
-
-
-
-
-
-
-
A
m
Fitting of baths/whb etc
-
n
Waste pipes
-
o
Rain water goods
3
p
Vent of sub-floor/roof
-
# Compounding matters
-
None
A
B
C
-
-
-
Key
3
Seriously defective
2
Defective
1
Not satisfactory
-
Satisfactory/NA
RATING
Score:
2445
RATING SCORES AFTER IMPROVEMENT
IMPROVE
Likelihood to
1 in
320
Outcomes to
0
1.0 10.0 89.0
%
Justification: Installation of an effective d.p.c. plus replacement of the salt affected wall plaster, clearing the
blocked rainwater downpipe and repointing the stonework would reduce the likelihood of an occurrence to
nearer the average; but the property would still be subject to the rise and fall of tides
Av:11
A B C D E
F G H
Av: Nos: Average likelihood, outcomes and HHSRS score for hazards from damp and mould by persons aged 14
years or under in pre 1920 HMO's, 1997-1999
NEW RATING
Score:
15
J
I
1 (BCC-01)
April 2006
HEALTH AND SAFETY RATING SYSTEM SCORES
LIKELIHOOD
Low
High
1 in 2
Av Pre 1920 non HMO: 446
2
< 4200 2400 1300 750 420 240 130
75
42
24
13
7.5
4
2.5
1.5 >
Justification: The presence of severe dampness in most areas of the flat means there is a high likelihood of
harm occurring in the next twelve months. There is constant dampness and also mould in the principal rooms,
which will have a psychological effect on the occupants.
OUTCOMES
Class I
Class II
%
Av Pre 1920 non HMO: 0.0
0
< 0.05 0.15 0.3
0.7
1.5
3
7
15
26
38 >
Av: 1.0
1
0.15 0.3
0.7
1.5
3
7
15
26
38 >
Av: 10.0
21.5
0.15 0.3
0.7
1.5
3
7
15
26
38 >
< 0.05
Class III
< 0.05
Av: 89.0
77.5
Class IV
< 0.05 0.15 0.3
0.7
1.5
3
7
15
26
38 >
Justification: Although there is some mould growth it is not sufficiently widespread to justify a change in the
harm outcomes from the average.
Av. Pre 1920 non HMO:11
A
B
C D E
F G H
I
J