-

HHSRS VERSION 2

SEPTEMBER 2004

DAMP AND MOULD GROWTH

HHSRS VERSION 2

Yes

Yes

No

No

Vulnerable age

Related hazards

Rear elevation

Persons aged under 15 years

Excessive cold

A) Door to patio

Multiple locations

Secondary hazards

B) Dormer to top floor rear room

C) Ceiling and walls to rear room

Dwelling : Top floor flat in a Victorian terraced house

(HMO).

DESCRIPTION OF HAZARD⁄S

Background: The house generally is in a poor state of repair. The top floor flat is on two levels, the upper floor

being the attic. There is access from the lower floor onto a patio - the flat roof of the back addition.

Rear main wall: The wall is severely affected by dampness. The roof allows water to soak downwards, and the

eavesgutters leak soaking the outside of the wall and allowing water to bounce up from the "patio". The plaster is

perished and there is mould gowth spreading from the floor.

Rear attic room: There are slipped slates and ill fitting flashings around the dormer opening. Damp has

penetrated soaking the ceiling and walls to the rear attic room.

LIST OF RELEVANT MATTERS

LIKELIHOOD & OUTCOMES

A

B&C

A

B&C

1

2

3

4

a

b

c

d

e

f

g

h

Rising damp

Penetrating damp

Condensation

-

-

-

I

Plumbing⁄waste pipes

j

Rain water goods

k

Roof⁄sub-floor spaces

l

Small room sizes

# Secondary hazards

None

3

3

3

-

-

-

Mould growth

2

Energy efficiency

3

3

Background ventilation

-

-

Extract ventilation

Clothes drying facilities

-

-

Damp proofing

-

-

Disrepair

3

3

Exposed water tanks etc

-

-

Water using appliances

-

-

-

-

A

B&C

-

-

Key

3

Seriously defective

2

Defective

1

Not satisfactory

-

Satisfactory⁄NA

A)

B&C

The minimum works would be to strip and properly recover the whole of roof; to renew

the rainwater goods; and remove all damp affected plaster and replaster and redecorate

the walls. This would reduce the likelihood to near the average for the age of the

property. (Clearly, other works are required to the premises as a whole.)

Improved Av:11

Score:

15

Average likelihood, outcomes and HHSRS score for hazards from damp & mould by

persons aged under 15 years in pre 1920 HMOs and all dwellings,1997-99.

Justification

NEW RATING

Av: Nos

IMPROVE

Likelihood to

1 in

320

Outcomes to

0

1.0 10.0 89.0

%

Example

RATING

RATING SCORES AFTER IMPROVEMENT

Average: 11

Score:

2445

< 0.05 0.15 0.3

0.7

1.5

3

7

15

26

38 >

Although there is some mould growth, it is not that serious. The over-riding problem is

the dampness, and there is nothing to suggest the outcomes would differ from the

average.

%

0.0

1.0

10.0

89.0

Average: 0.0

0.0

< 0.05 0.15 0.3

0.7

1.5

3

7

15

26

38 >

Av: 1.0

1.0

< 0.05 0.15 0.3

0.7

1.5

3

7

15

26

38 >

Av: 10.0

10.0

< 0.05 0.15 0.3

0.7

1.5

3

7

15

26

38 >

Av: 89.0

89.0

The presence of such severe dampness and the mould growth means there is a very

high likelihood of a harmful occurrence over the next twelve months. The condition

would also have a psychological effect on any occupant.

Justification

OUTCOMES

Class I

Class II

Class III

Class IV

Justification

240 130

75

42

24

13

7.5

4

2.5

1.5 >

420

< 4200 2400 1300 750

Average: 430

Example

2

1 in

2

Low

High

LIKELIHOOD

HHSRS VERSION 2

SEPTEMBER 2004

HEALTH AND SAFETY RATING SYSTEM SCORES

Pre 1920 non s.c. Flat