Proposed Redevelopment
of Barbican House, 26-34
Old Street, London EC1V
Daylight and Sunlight
Report
Director: Justin Bolton
Date: 24 March 2014
Version: Draft v.1
Project: P056 Barbican House
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Contents 1.0
2.0
3.0
4.0
5.0
6.0
7.0
Executive Summary Introduction Planning Policy Methodology Surrounding Properties Assessment Results Internal Daylight Assessment 3 4 5 6 9 10 11 ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ Appendices Appendix A ‐ Existing & Proposed Drawings Appendix B ‐ VSC Results for Neighbouring Buildings Appendix C ‐ NSL & APSH Results for Neighbouring Buildings Appendix D ‐ Window Maps of Neighbouring buildings Appendix E ‐ ADF Results for Proposed Residential Component Barbican House Barbican House Daylight and Sunlight Report 24 March 2014.docx Page 2 1
Executive Summary
1.1
This report has considered the potential daylight/ sunlight effects to the surrounding residential
properties as a result of the implementation of the proposed development.
1.2
Where necessary, detailed assessments have been undertaken to the surrounding buildings
which have habitable room windows overlooking the site. This has been undertaken in
accordance with the BRE report entitled ‘Site layout planning for daylight and sunlight: A guide
to good practice’, more commonly known as ‘The BRE guidelines’. Detailed tests have not been
undertaken to the surrounding commercial buildings as they are not considered to have a
reasonable expectation of daylight or sunlight to require assessment.
1.3
The proposed development includes the extensive refurbishment of the existing building, and
the addition of a residential fifth floor.
1.4
The daylight and sunlight results show that all of the surrounding residential properties will
experience a small change to their daylight and sunlight with the proposed development in
place. Although it is recognised that these alterations are within the intention and application
of the BRE guidelines recommended criteria. An overshadowing study is not considered
necessary as there are no surrounding amenity spaces that are likely to be affected by the
proposed development.
1.5
Internal daylight within the proposed scheme has been considered and near full BRE
compliance has been recorded.
1.6
Overall the daylight and sunlight effects (internal and external) as a result of the proposed
development are considered acceptable and in accordance with planning policy.
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Introduction
2.1
Point 2 Surveyors Ltd has been appointed by MHA Associates to undertake a daylight and
sunlight study with regard to the proposed redevelopment at Barbican House, 26-34 Old Street,
London EC1V.
2.2
The proposed development includes a substantial refurbishment of the existing building, and
the inclusion of an additional residential fifth floor.
2.3
This report will assess the potential daylight, sunlight and overshadowing effects as a result of
the proposal on the surrounding residential properties.
2.4
The calculations in this report have been based on the submitted plans, elevations and sections
by MWA Architects Ltd along with land survey information of the surrounding elevations.
Access into the surrounding properties has not been obtained and we have therefore used site
photographs and information from the local authorities planning records to assume the
internal layouts and room uses.
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3
Methodology
3.1
When assessing any potential effects on the surrounding properties, the BRE guidelines suggest
that only those windows that have a reasonable expectation of daylight or sunlight need to be
assessed. In particular the BRE guidelines at paragraph 2.2.2 state:
“The guidelines given here are intended for use for rooms in adjoining dwellings
where daylight is required, including living rooms, kitchens and bedrooms.
Windows to bathrooms, toilets, storerooms, circulation areas and garages need not
be analysed. The guidelines may also be applied to any existing non-domestic
building where the occupants have a reasonable expectation of daylight; this would
normally include schools, hospitals, hotels and hostels, small workshops and some
offices.”
3.2
Further to the above statement, it is considered that the vast majority of commercial properties
do not have a reasonable expectation of daylight or sunlight. This is because they are generally
designed to rely on artificial electric lighting rather than natural light.
3.3
If a property is considered to have a reasonable expectation of daylight or sunlight the following
methodology to assess the impacts has been used:
Daylighting
3.4
It is common to consider the local authorities planning policy in order to establish the basis for
which consideration in relation to light should be approached. The following can be used as a
quick test to assess the likely effect on existing surrounding properties:
a)
Project a 25 degree line from the centre of the lowest window on the
existing building;
b)
If the whole of your new development is lower than this line then it is
unlikely to have a substantial effect on the daylight enjoyed by occupants in
the existing building.
3.5
The above test is also known as the 25° angle test but has not been used for this assessment
as it does not reflect the differing heights and layouts of the buildings in the local area.
3.6
Islington do suggest that more detailed tests to fully assess the loss of daylight in existing
buildings, in particular the use of the Vertical Sky Component (VSC) method of assessment.
The Vertical Sky Component is expressed as a ratio of the maximum value of daylight
achievable for a completely unobstructed vertical wall. The maximum value is almost 40%.
This is because daylight hitting a window can only come from one direction immediately
halving the available light. The value is limited further by the angle of the sun. This is why
if the VSC is greater than 27% enough sunlight [SIC] should be reaching the existing window.
Any reduction below this level should be kept to minimum.
Windows to some existing rooms may already fail to achieve this target under existing
conditions. In these circumstances it is possible to accept a reduction to the existing level
of daylight to no less than 80% of its former value.
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3.7
In summary to the above, a room is considered to continue to receive good levels of daylight if
the window can receive a VSC of at least 27%. If the window receives a VSC below 27% in the
existing scenario a reduction of less than 0.8 times its former value (20%), as a result of the
proposed development, is considered acceptable.
3.8
In conjunction with the VSC tests, the BRE guidelines and British Standard 8206-Part2:2008
suggest that the distribution of daylight is assessed using the No Sky Line (NSL) test. This test
separates those areas of the working plane that can receive direct skylight and those that
cannot.
3.9
The BRE guidelines suggest that the daylight distribution test is undertaken to existing
surrounding properties when the internal arrangements are known. To assess the impact of
any reduction the BRE guidelines suggest:
“If, following construction of a new development, the no sky line moves so that the area of
the existing room, which does receive direct skylight, is reduced to less than 0.8 times its
former value this will be noticeable to the occupants, and more of the room will appear
poorly lit.”
Sunlighting
3.10
The amount of direct sunlight a window can enjoy is dependent on its orientation and the
extent of any external obstructions. For example a window that faces directly north, no matter
what external obstructions are present, will not be able to receive good levels of sunlight
throughout the year. However, a window that faces directly south with no obstructions will
enjoy very high levels of sunlight throughout the year. As the potential to receive sunlight is
dependent on a window’s orientation, the BRE guidelines state:
“To assess loss of sunlight to an existing building, it is suggested that all main living rooms
of dwellings, and conservatories, should be checked if they have a window facing within
90° of due south. Kitchens and bedrooms are less important, although care should be taken
not to block too much sun.”
3.11
To consider any sunlight effect to the surrounding properties the BRE guidelines suggest
calculating the Annual Probable Sunlight Hours (APSH) at the centre of each window on the
outside face of the window wall. The BRE guidelines suggest that:
“If this window point can receive more than one quarter of APSH (see section 3.1), including
at least 5% of APSH in the winter months between 21st September and 21st March, then
the room should still receive enough sunlight.”
3.12
If the above criteria is not met, the BRE guidelines suggest calculating the APSH at the window
in the existing situation, i.e. before redevelopment. If the reduction of APSH between the
existing and proposed situations is less than 0.8 times its former value for either the total APSH
or in the winter months; and greater than 4% for the total APSH, then the occupants of the
adjoining building are likely to notice the reduction in sunlight.
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Internal Daylight
3.13
The BRE recognise the importance for receiving adequate daylight within the proposed
residential accommodation. The use of the Average Daylight Factor (ADF) is used to determine
the average illuminance on the working plane in a room, divided by the illuminance on an
unobstructed surface outdoors.
3.14
The BRE suggests minimum ADF standards for room use for which the following is
recommended:



Kitchens
Living rooms
Bedrooms
2.0%
1.5%
1.0%
Overshadowing
3.15
An overshadowing study is not considered necessary as there are no surrounding amenity
spaces that are likely to be affected by the proposed development.
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4
Surrounding Properties
4.1
Following a site visit and research on the Valuation Office Agency website, the following
surrounding properties are those that are within close proximity of the site, and are understood
to have some form of residential accommodation:
a)
The Old Lofts, Memel Street
b)
1-3 Domingo Street
4.2
A site plan illustrating the position of the above surrounding properties showing the position
of each building that has been assessed is given at Appendix A, whereas the window
highlighting the location of the tested windows is located in Appendix D.
4.3
The remaining surrounding properties are understood to be of commercial use and not
considered to have a reasonable expectation of daylight or sunlight. Detailed daylight and
sunlight assessments have not therefore been undertaken to these properties.
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5
Assessment Results For Impacts to Neighbouring Buildings
5.1
Following the identification of those properties that are considered to have a reasonable
expectation of daylight and sunlight, VSC, NSL, and where appropriate, APSH tests have been
undertaken.
5.2
The tabular results of the assessments are given at Appendix C and D.
5.3
The VSC method of assessment indicates that 77% (40 out of 52 windows tested) achieve BRE
compliance.
5.4
Of the 12 that do not meet the VSC, 9 of these windows experience changes which are within
the band of between 20-30% from the original value. The BRE guidelines allow for a reduction
in light of up to 20% - beyond which the occupiers may notice a change. It is noted that three
of the windows (W3/12, W6/12 and W1/14 – see drawing P056/W/01 in Appendix D) of The
Old Lofts building experience a reduction of daylight very slightly beyond the BRE guidelines
recommendations, with a maximum reduction of 24.02%. Given that that the majority of these
alterations fall within 10% of this target criteria, these alterations are not considered to be
significant.
5.5
The NSL daylight results for all of the properties assessed show that most of the recoded
reductions are well within the application and intention of the BRE guidelines. Where there
are reductions in light, these percentage changes are in some instances a product of low
existing light where any further reduction can result in a disproportionate change. The
retained levels of light are commensurate with an urban setting where the expectation for
natural light is less when compared to a strictly suburban location.
5.6
There is only one building (1-3 Domingo Street) which obliquely overlooks the site and also
within 90 degrees of due south. The APSH sunlight results for this property highlights full BRE
compliance with very little change to the potential sunlight availability.
5.7
Overall, the daylight and sunlight results show that all of the surrounding residential properties
will experience very little impact as a result of the implementation of the proposed scheme.
Where there are changes this is considered to be well within the intensions and application of
the BRE guidelines. The daylight and sunlight effects as a result of the proposed development
are therefore considered acceptable and in accordance with Islington’s planning policy.
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6
Assessment Results for Internal Daylight within the proposed Residential Accommodation
6.1
There is residential accommodation proposed from the first floor to the forth of the Barbican
House building. The additional level (the fourth floor) has not been subjected to any detailed
technical assessment as the outlook from this level includes less local obstruction for which the
retained daylight results would easily pass the BRE standards.
6.2
The remaining levels (first to third) are by virtue of their location will have greater challenges
in achieving the target values suggested by the BRE for room use. The result so of the detailed
assessments highlight a compliance rate of 94% (17 out of the 18 rooms meeting the
guidelines).
6.3
The one room (located on the rear elevation of the first level) which does not meet the
standards, is a bedroom with a retained ADF of 0.83% - which is just shy of the target 1.0%.
Given the expectation for natural daylight within a secondary bedroom, this achievable figure
is considered well within the intension of the BRE guidelines.
6.4
The overall percentage pass rate would be higher in the event that the fourth floor calculations
were included, although the retained daylight for the third level is well beyond the standards
suggesting any subsequent floor would easily pass the target standards.
6.5
The retained daylight within the proposed residential accommodation for the barbican House
scheme is excellent with high retained levels of natural light.
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Appendix A
Barbican House Barbican House Daylight and Sunlight Report 24 March
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Page 11
7
-4
41
9
-3
35
ET
D
OL
ST
RE
O
NG
1-3
MI
DO
ET
RE
ST
W
RO
T
N
CE
ES
CR
S
FT
D
E
TH
OL
LO
T
EE
TR
LS
ME
ME
Site Photography
Project: Barbican
Existing Survey
2517 Series Drawings
Sources:
Proposed 11/03/14
As Proposed (1).skp
Comments 19/03/14
House
Drawing Title:
London
Key:
Drawn by:
CJ
Date: Mar
2014
Scale:1:300 @A3
Site Plan
Existing Buildings
Site Plan
Drawing No. P056/01
Rel.:
3
Site Photography
Project: Barbican
Existing Survey
2517 Series Drawings
Sources:
Proposed 11/03/14
As Proposed (1).skp
Comments 19/03/14
House
Drawing Title:
London
Key:
Drawn by:
CJ
Date: Mar
2014
Scale:NTS
@A3
3D View
Existing Buildings
3d Massing Model
Drawing No. P056/02
Rel.:
3
Site Photography
Project: Barbican
Existing Survey
2517 Series Drawings
Sources:
Proposed 11/03/14
As Proposed (1).skp
Comments 19/03/14
House
Drawing Title:
London
Key:
Drawn by:
CJ
Date: Mar
2014
Scale:NTS
@A3
3D View
Existing Buildings
3d Massing Model
Drawing No. P056/03
Rel.:
3
7
-4
41
9
-3
35
ET
OL
D
ST
RE
O
NG
1-3
MI
DO
ET
RE
ST
OW
R
NT
E
SC
E
CR
S
FT
D
E
TH
OL
LO
T
EE
L
ME
ME
Site Photography
Project: Barbican
Sources:
House
Drawing Title:
London
Existing Survey
2517 Series Drawings
Proposed 11/03/14
As Proposed (1).skp
Comments 19/03/14
R
ST
Key:
Drawn by:
CJ
Date: Mar
2014
Scale:1:300 @A3
Site Plan
Proposed Scheme 13/03/14
Site Plan
Drawing No. P056/10
Rel.:
3
Site Photography
Project: Barbican
Existing Survey
2517 Series Drawings
Sources:
Proposed 11/03/14
As Proposed (1).skp
Comments 19/03/14
House
Drawing Title:
London
Key:
Drawn by:
CJ
Date: Mar
2014
Scale:NTS
@A3
3D View
Proposed Scheme 19/03/14
3d Massing Model
Drawing No. P056/11
Rel.:
3
Site Photography
Project: Barbican
Existing Survey
2517 Series Drawings
Sources:
Proposed 11/03/14
As Proposed (1).skp
Comments 19/03/14
House
Drawing Title:
London
Key:
Drawn by:
CJ
Date: Mar
2014
Scale:NTS
@A3
3D View
Proposed Scheme 19/03/14
3d Massing Model
Drawing No. P056/12
Rel.:
3
Appendix B
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BARBICAN HOUSE
OLD STREET, LONDON
EXISTING VS PROPOSED
Room
Room Use
DAYLIGHT ANALYSIS
SCHEME
RECEIVED 19/03/14
Window
MAR 2014
EXISTING
VSC
PROPOSED LOSS
VSC
VSC
%LOSS
VSC
The Old Lofts, Memel Street
R1/10
R1/10
W1/10
W2/10
15.38
6.31
15.38
6.05
0.00
0.26
0.00
4.12
R2/10
W3/10
2.98
2.69
0.29
9.73
R3/10
W4/10
2.33
2.10
0.23
9.87
R4/10
W5/10
1.93
1.77
0.16
8.29
R5/10
W6/10
1.91
1.86
0.05
2.62
R6/10
W7/10
2.04
1.99
0.05
2.45
R1/11
R1/11
W1/11
W2/11
21.99
9.11
21.99
8.48
0.00
0.63
0.00
6.92
R2/11
W3/11
6.25
5.45
0.80
12.80
R3/11
W4/11
4.85
4.05
0.80
16.49
R4/11
W5/11
3.85
3.22
0.63
16.36
R5/11
W9/11
3.30
3.17
0.13
3.94
R6/11
W10/11
3.53
3.44
0.09
2.55
R7/11
R7/11
W6/11
W7/11
3.18
2.96
2.75
2.62
0.43
0.34
13.52
11.49
R8/11
W8/11
2.63
2.47
0.16
6.08
R1/12
R1/12
W1/12
W2/12
28.94
13.14
28.94
11.59
0.00
1.55
0.00
11.80
R2/12
W3/12
10.15
8.01
2.14
21.08
R3/12
W4/12
8.51
6.28
2.23
26.20
R4/12
W5/12
6.94
5.17
1.77
25.50
R5/12
W9/12
6.59
6.23
0.36
5.46
R6/12
W10/12
7.07
6.85
0.22
3.11
R7/12
R7/12
W6/12
W7/12
5.67
5.35
4.49
4.47
1.18
0.88
20.81
16.45
R8/12
W8/12
4.88
4.43
0.45
9.22
R1/13
W1/13
23.13
19.02
4.11
17.77
Copy of APR190314.xls
25/03/2014
1
BARBICAN HOUSE
OLD STREET, LONDON
EXISTING VS PROPOSED
DAYLIGHT ANALYSIS
SCHEME
RECEIVED 19/03/14
MAR 2014
Window
EXISTING
VSC
PROPOSED LOSS
VSC
VSC
%LOSS
VSC
R2/13
W2/13
21.78
16.01
5.77
26.49
R3/13
W3/13
19.86
13.11
6.75
33.99
R4/13
W4/13
16.64
11.42
5.22
31.37
R5/13
W5/13
15.48
11.07
4.41
28.49
R6/13
W6/13
17.69
16.51
1.18
6.67
R7/13
W7/13
19.04
18.58
0.46
2.42
R1/14
W1/14
33.81
25.69
8.12
24.02
R2/14
W2/14
32.81
22.76
10.05
30.63
R3/14
W3/14
29.50
21.11
8.39
28.44
R4/14
W4/14
28.14
20.74
7.40
26.30
R5/14
W5/14
32.10
30.46
1.64
5.11
R6/14
W6/14
34.19
33.42
0.77
2.25
R1/40
R1/40
W2/40
W3/40
11.43
12.68
11.14
12.51
0.29
0.17
2.54
1.34
R1/41
R1/41
W2/41
W3/41
17.17
18.36
16.68
17.96
0.49
0.40
2.85
2.18
R2/41
W1/41
17.20
16.61
0.59
3.43
R1/42
R1/42
W2/42
W3/42
23.83
24.78
22.98
24.21
0.85
0.57
3.57
2.30
R2/42
W1/42
23.53
22.70
0.83
3.53
R1/43
R1/43
W3/43
W4/43
32.15
32.69
31.11
31.89
1.04
0.80
3.23
2.45
R2/43
R2/43
W1/43
W2/43
31.26
31.51
30.15
30.40
1.11
1.11
3.55
3.52
Room
Room Use
1-3 Domingo Street
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Appendix C
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BARBICAN HOUSE
OLD STREET, LONDON
EXISTING VS PROPOSED
Room/
Floor
Room Use
DAYLIGHT DISTRIBUTION ANALYSIS
SCHEME
RECEIVED 19/03/14
MAR 2014
Whole
Room
Prev
sq ft
New
sq ft
Loss
sq ft
%Loss
155.9
171.1
151.8
152.5
161.7
149.1
155.9
131.5
153.8
161.6
161.7
149.1
153.0
155.9
155.9
131.5
153.8
161.6
161.7
149.1
153.0
155.9
86.7
92.7
148.3
88.1
77.1
143.4
137.2
105.0
146.3
94.9
98.4
145.8
118.5
154.5
32.7
24.5
18.3
21.3
20.7
155.7
34.1
27.7
20.5
18.3
19.0
14.9
5.1
155.8
43.2
42.8
40.4
37.9
36.3
34.3
16.4
68.9
50.7
79.4
29.4
37.0
73.1
71.7
100.0
143.1
75.8
94.8
143.2
116.3
154.4
29.9
21.1
14.6
21.0
20.7
155.7
33.3
24.6
17.3
18.0
18.1
9.3
4.5
155.8
39.6
34.7
29.3
37.3
36.3
22.7
14.7
66.5
39.0
47.6
13.7
17.4
69.4
71.3
80.0
84.6
41.4
44.3
142.3
116.3
0.1
2.8
3.4
3.7
0.3
0.0
0.0
0.8
3.1
3.2
0.4
0.9
5.5
0.6
0.0
3.6
8.1
11.1
0.6
0.0
11.5
1.7
2.4
11.7
31.8
15.7
19.6
3.7
0.3
20.0
58.5
34.4
50.5
1.0
0.0
0.1
8.6
13.9
20.2
1.4
0.0
0.0
2.3
11.2
15.6
2.2
4.7
36.9
11.8
0.0
8.3
18.9
27.5
1.6
0.0
33.5
10.4
3.5
23.1
40.1
53.4
53.0
5.1
0.4
20.0
40.9
45.4
53.3
0.7
0.0
275.2
245.1
137.5
245.1
137.5
182.7
198.0
258.3
227.8
99.7
241.4
121.3
182.7
197.8
256.7
225.7
99.7
240.3
121.3
182.7
197.8
1.5
2.2
-0.1
1.1
0.0
0.0
0.0
0.6
1.0
-0.1
0.5
0.0
0.0
0.0
The Old Lofts, Memel Street
R1/10
R2/10
R3/10
R4/10
R5/10
R6/10
R1/11
R2/11
R3/11
R4/11
R5/11
R6/11
R7/11
R8/11
R1/12
R2/12
R3/12
R4/12
R5/12
R6/12
R7/12
R8/12
R1/13
R2/13
R3/13
R4/13
R5/13
R6/13
R7/13
R1/14
R2/14
R3/14
R4/14
R5/14
R6/14
1-3 Domingo Street
R1/40
R1/41
R2/41
R1/42
R2/42
R1/43
R2/43
Copy of DDPR190314.xls
25/03/2014
1
BARBICAN HOUSE
OLD STREET, LONDON
EXISTING VS PROPOSED
Room
Window
Room
Use
SUNLIGHT ANALYSIS
SCHEME
RECEIVED 19/03/14
Window
Existing
Proposed
Winter Annual Winter Annual
APSH
APSH
APSH
APSH
Winter
%Loss
MAR 2014
Annual
%Loss
Room
Existing
Proposed
Winter Annual Winter Annual
APSH
APSH
APSH
APSH
Winter Annual
%Loss %Loss
1-3 Domingo Street
R1/40
R1/40
W2/40
W3/40
5
7
20
25
5
7
20
25
0.0
0.0
0.0
0.0
8
27
8
27
0.0
0.0
R1/41
R1/41
W2/41
W3/41
9
9
30
32
9
9
29
32
0.0
0.0
3.3
0.0
12
36
12
35
0.0
2.8
R2/41
W1/41
9
31
9
31
0.0
0.0
9
31
9
31
0.0
0.0
R1/42
R1/42
W2/42
W3/42
13
14
44
43
13
14
43
43
0.0
0.0
2.3
0.0
16
47
16
46
0.0
2.1
R2/42
W1/42
12
44
12
41
0.0
6.8
12
44
12
41
0.0
6.8
R1/43
R1/43
W3/43
W4/43
20
20
57
59
20
20
54
56
0.0
0.0
5.3
5.1
21
60
21
57
0.0
5.0
R2/43
R2/43
W1/43
W2/43
18
19
53
56
18
19
52
54
0.0
0.0
1.9
3.6
19
56
19
54
0.0
3.6
Appendix D
Barbican House Barbican House Daylight and Sunlight Report 24 March
2014.docx
Page 14
1-3 Domingo Street
The Old Lofts, Memel Street
North East Elevation
The Old Lofts, Memel Street
North West Elevation
Site Photography
Project: Barbican
Existing Survey
2517 Series Drawings
Sources:
Proposed 11/03/14
As Proposed (1).skp
Comments 19/03/14
House
Drawing Title:
London
Key:
Drawn by:
CJ
Date: Mar
2014
Scale:NTS
@A3
Window Locations
Surrounding Buildings
3d Massing Model
Drawing No. P056/W/01
Rel.:
3
Appendix E
Barbican House Barbican House Daylight and Sunlight Report 24 March
2014.docx
Page 15
1st Floor
2nd Floor
3rd Floor
Site Photography
Project: Barbican
Existing Survey
2517 Series Drawings
Sources:
Proposed 11/03/14
As Proposed (1).skp
Comments 19/03/14
House
Drawing Title:
London
Key:
Drawn by:
CJ
Date: Mar
2014
Scale:1:150 @A3
Room Layouts & ADF Results
Proposed Scheme 1*/03/14
Site Plan
Drawing No. P056/INT/02
Rel.:
2
BARBICAN HOUSE
OLD STREET, LONDON
LIGHT WITHIN SCHEME
Room
Roomuse
INTERNAL DAYLIGHT ANALYSIS
SCHEME
RECEIVED 11/03/14
MAR 2014
Window
VSC(%)
ADF(%)
TOTAL
ADF(%)
Proposed Scheme
R1/101
R1/101
BEDROOM
BEDROOM
W1/101
W2/101
24.48
24.86
1.74
2.75
4.49
R2/101
BEDROOM
W22/101
4.96
0.83
0.83
R3/101
R3/101
R3/101
R3/101
LKD
LKD
LKD
LKD
W3/101
W4/101
W19/101
W21/101
24.93
25.17
5.84
5.35
0.97
0.75
0.08
0.20
2.00
R4/101
R4/101
R4/101
R4/101
R4/101
R4/101
LKD
LKD
LKD
LKD
LKD
LKD
W6/101
W7/101
W8/101
W15/101
W17/101
W18/101
26.19
26.75
27.01
8.62
6.91
6.89
0.86
0.67
0.84
0.40
0.17
0.06
3.00
R5/101
R5/101
R5/101
R5/101
BEDROOM
BEDROOM
BEDROOM
BEDROOM
W9/101
W10/101
W11/101
W12/101
27.35
27.12
24.65
23.76
2.78
1.96
1.28
1.25
7.26
R6/101
R6/101
BEDROOM
BEDROOM
W13/101
W14/101
23.20
15.41
1.43
2.20
3.62
R1/102
R1/102
BEDROOM
BEDROOM
W1/102
W2/102
28.23
28.50
1.93
3.04
4.97
R2/102
BEDROOM
W22/102
7.76
1.59
1.59
R3/102
R3/102
R3/102
R3/102
LKD
LKD
LKD
LKD
W3/102
W4/102
W19/102
W21/102
28.48
28.59
9.40
8.58
1.06
0.82
0.16
0.45
2.48
R4/102
R4/102
R4/102
R4/102
R4/102
R4/102
LKD
LKD
LKD
LKD
LKD
LKD
W6/102
W7/102
W8/102
W15/102
W17/102
W18/102
29.11
29.42
29.47
13.61
11.03
10.95
0.93
0.72
0.90
0.59
0.30
0.11
3.54
R5/102
R5/102
R5/102
R5/102
BEDROOM
BEDROOM
BEDROOM
BEDROOM
W9/102
W10/102
W11/102
W12/102
29.57
29.29
32.17
32.13
2.94
2.07
1.53
1.53
8.07
R6/102
R6/102
BEDROOM
BEDROOM
W13/102
W14/102
31.88
21.09
1.77
2.75
4.52
R1/103
BEDROOM
W1/103
31.71
2.10
Copy of IPR110314.xls
25/03/2014
1
BARBICAN HOUSE
OLD STREET, LONDON
LIGHT WITHIN SCHEME
INTERNAL DAYLIGHT ANALYSIS
SCHEME
RECEIVED 11/03/14
MAR 2014
Room
Roomuse
Window
VSC(%)
ADF(%)
TOTAL
ADF(%)
R1/103
BEDROOM
W2/103
31.99
3.33
5.43
R2/103
BEDROOM
W22/103
13.91
2.63
2.63
R3/103
R3/103
R3/103
R3/103
LKD
LKD
LKD
LKD
W3/103
W4/103
W19/103
W21/103
31.92
31.92
16.88
15.67
1.16
0.89
0.28
0.77
3.10
R4/103
R4/103
R4/103
R4/103
R4/103
R4/103
LKD
LKD
LKD
LKD
LKD
LKD
W6/103
W7/103
W8/103
W15/103
W17/103
W18/103
31.94
32.02
31.87
22.38
18.94
18.79
1.00
0.77
0.95
0.86
0.47
0.18
4.23
R5/103
R5/103
R5/103
R5/103
BEDROOM
BEDROOM
BEDROOM
BEDROOM
W9/103
W10/103
W11/103
W12/103
31.78
31.51
35.70
36.01
3.12
2.19
1.63
1.64
8.58
R6/103
R6/103
BEDROOM
BEDROOM
W13/103
W14/103
36.48
29.21
1.94
3.49
5.43
Copy of IPR110314.xls
25/03/2014
2