tank

dn

Kitchen

DESCRIPTION OF HAZARDS

Plan of flat

Dwelling: Pre 1920 non-self contained attic flat

Background: This three-storey late Victorian house in Inner London was converted in the 1950s to

provide a self contained flat on the ground floor and three non-self contained flats on the upper

floors. The one bedroomed attic flat shares a bathroom and a separate w.c. on the first floor with

the two flats on that level, but has its own small kitchen.

Insulation: Apart from 100mm of compacted insulation in the small, shallow void at the apex, the

attic flat has no thermal insulation, being located directly under the slate roof.

Ventilation: The full height living room window faces north and has one low opening casement.

The bedroom has a small openable roof light, while the kitchen is lit by fixed transparent tiles and

ventilated by a small extractor above the electric cooker that discharges into the roof void.

Heating:- The flat is heated by two old storage heaters, running on off-peak electricity, situated

under the ceiling eaves in the living room and bedroom.

LIST OF RELEVANT MATTERS

LIKELIHOOD & OUTCOMES

A

A

a

Thermal insulation

3

# Secondary hazards

b

Orientation of glazing

1

None

-

b

External shading & exposure

-

c

Heating controls

2

d

Ventilation provision

3

e

Ventilation control

-

Key

3

Seriously defective

1 Not satisfactory

f

Disrepair to ventilation

-

2

Defective

- Satisfactory/NA

HHSRS VERSION 2

SEPTEMBER 2004

HEAT

Persons aged 60 years or over

Excess cold; Falls from windows.

EXCESS

Vulnerable group

Related hazards

Front elevation

HHSRS VERSION 2

Multiple locations

Yes

No

Secondary hazards

Yes

No

Rear roof light

storage heater

roof light

Bedroom

void above

Living room

storage heater

Average likelihood, outcomes and HHSRS score for excessive cold for persons aged 60

years or more in pre 1920 HMOs, 1997-99.

HHSRS VERSION 2

SEPTEMBER 2004

HEALTH AND SAFETY RATING SYSTEM SCORES

Pre 1920 non s.c. flat

LIKELIHOOD

1 in

180

Low

High

Average: 60,000

Example

180

< 4200 2400 1300 750 420 240 130

75

42

24

13

7.5

4

2.5

1.5 >

Justification

OUTCOMES

Class I

Class II

Class III

Class IV

Justification

RATING

The lack of roof insulation and limited provision for ventilation, results in above average

indoor temperatures in all rooms in hot weather. Fortunately, the living room window

faces north (but presents a risk of falls if fully opened due to its low positioned opening

light). Conversely, the rooms quickly become cold at night, even in late Spring and early

Autumn, but using the old storage heaters to combat this results in further excess heat in

the flat when the next day is warm.

Low

High

Average: 31.0

31.6

< 0.05 0.15 0.3

0.7

1.5

3

7

15

26

38 >

Av: 8.0

10.0

< 0.05 0.15 0.3

0.7

1.5

3

7

15

26

38 >

Av: 25.0

21.5

< 0.05 0.15 0.3

0.7

1.5

3

7

15

26

38 >

Av: 36.0

36.9

< 0.05 0.15 0.3

0.7

1.5

3

7

15

26

38 >

Score

59

%

31.6

10.0

21.5

36.9

Although the risk of the dwelling reaching unhealthily high temperatures and the

consequent likelihood of harm is greater than average, there is nothing to suggest that

the spread of harms would be other than average.

Average: 5

Example

A B C D E F G H

I

J

Score

1848

RATING SCORES AFTER IMPROVEMENT

IMPROVE

Justification

NEW RATING

Av Nos:

Likelihood to

1 in 5,600

Outcomes to

31.6 10

21.5 36.9 %

There should be adequate thermal insulaion to the roof and larger opening double

glazed roof lights installed in the bedroom and kitchen. Other works required include

replacing the extractor fan in the kitchen and the old storage heaters with modern more

efficient and controllable units. This would increase the energy efficiency of the flat

substantially and thereby reduce the likelihood of both excessive heat and cold.

Av: 5

J

Improved

A B C D E F G H

I