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  Summary of Hazards  Hazard Number 2 Excess Cold

No.SourceProperty Date construction/conversionStoreys/LocationProperty TypeSummary InformationHazardLink
1BCC1936Ground / 1st
detached House
Although the dwelling has insulated cavity walls, double glazed windows throughout, and full gas central heating, including a radiator in the attic room, there is no insulation to the main roof, or any insulation in the attic room floor cavity. Lack of insulation in the attic would counter the positive factors.C Example 1
2BCCPre 1920Two StoreyMid-terraced,
Heating is provided by storage heaters, which
are in good working order, but do not have an additional “convector boost” or dual heat facility. The charge period associated with economy tariffs and high static heat losses associated with these heaters means that there will be inadequate heating in the evenings and early mornings. At these times, the house has a higher likelihood than average, of becoming unhealthily cold in winter without the use of supplementary heating.
B Example 2
3CLG19605th & 6th Floor
9 storey slab
block of 32 maisonettes
There is damp and mould growth to the external
walls of the upper floor rooms. Available heating is inefficient and expensive to run. The exposed position of the block, together with the large, single-glazed windows, mean that there is considerable heat loss. The likelihood of the dwelling being unhealthily cold is increased substantially.
A Example 3
4CLGVictorian3 Storey
House converted into 3 self- contained flats in the 1950s
Top Floor
Heating and loft insulation is inadequate. The likelihood of the dwelling becoming unhealthily cold is significantly higher than for the average Pre-1920 dwellinA Example 4
5CLG1950Ground / 1st
detached house
The walls are of steel frame construction, faced externally with vertical steel sheeting. Internally, the walls are finished with plasterboard supported on timber frames. Heating and insulation is inadequate. The likelihood of the dwelling being unhealthily cold is increased.A Example 5
6CLGPre 1920Ground / 1stFloor3-bedroomed
Full gas-fired central heating is installed. All windows are single glazed, and the roof space lacks any form of thermal insulation, which increases the likelihood of excess cold to higher than average.C Example 6
7BCCPre 19201st FloorBed Sit This dwelling is a bed/living room of 21.7m2
floor area located on the first floor and includes cooking facilities. The
ceiling is around 2700mm high. It has two heat loss walls (front and side), both of which have a large window (bay to front)
constructed of pvu-c with double glazing.
A Example 7
8BCC1970End terrace3 storey house

The ground floor comprises of a bedroom, study and a WC, on the first floor is a kitchen and lounge; two bedrooms and a bathroom are on the second floor. The front elevation is north-east facing. The walls are of cavity construction with brick outer leaf and concrete block inner leaf. At the top floor level, the external wall has some additional exterior timber cladding to both the front and rear elevations. There is around 150mm of loft insulation present but there is no insulation to the wall cavity. The dwelling has a full gas fired central heating system withadequately sized radiators in each room and within the stairwell. Windows are all timber, single glazed, casements of typical size, although within the rear wall of the lounge there are two large picture windows that extend from floor tovirtually ceiling level and make up around 60% of the overall area of the rear heat loss wall. All the windows are inreasonably good repair condition and no more draughty than to be expected for their age and style

D Example 8
9WoE1950Two storey semi-detached system built house Two storey semi-detached system built house

This dwelling comprises a ground floor, containing lounge, dining room and kitchen, and a first floor, containing 3 bedrooms and a bathroom. The original concrete panel walls on the ground floor have been replaced with a fully insulated cavity construction. The Mansard roof remains, and at first floor level this consists of roofing tiles, rafters and plasterboard with internal skim, but is otherwise uninsulated. It has been calculated that this first flooraspect of the roof structure provides the same U value as a solid 9 inch wall. The loft space is provided with 250mm of insulation. Windows and doors are UPvC double glazed. There is gas fired central heating thoughout the dwelling.There is a wood burning stove in the lounge. The energy efficiency rating for this house has been calculated at 58 (RDSAP methodology) which is above the average energy eficiency rating in England and Wales (46).

D Example 9
BCC – Bristol City Council
CLG – Department of Communities and Local Government
IDeA- Improvement and Development Agency (for Local Government)
WoE - West of England Group
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