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Daylight and Sunlight Study
47 Gainsford Road, London E17 6QB
4 May 2016
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB
Right of Light Consulting
Burley House15-17 High StreetRayleighEssex SS6 7EW
Tel: 0800 197 4836
DAYLIGHT AND SUNLIGHT STUDY Page 147 Gainsford Road, London E17 6QB
CONTENTS
1 EXECUTIVE SUMMARY ...................................................................................................2
1.1 Overview ..................................................................................................................2
2 INFORMATION SOURCES...............................................................................................3
2.1 Documents Considered ............................................................................................3
3 METHODOLOGY OF THE STUDY ...................................................................................4
3.1 BRE Guide : Site Layout Planning for Daylight and Sunlight.....................................43.2 Daylight to Windows .................................................................................................43.3 Sunlight availability to Windows ................................................................................53.4 Overshadowing to Gardens and Open Spaces .........................................................5
4 RESULTS OF THE STUDY...............................................................................................7
4.1 Windows & Amenity Areas Considered.....................................................................74.2 Numerical Results.....................................................................................................74.3 Daylight to Windows .................................................................................................74.4 Sunlight to Windows .................................................................................................74.5 Overshadowing to Gardens and Open Spaces .........................................................74.6 Conclusion................................................................................................................7
5 CLARIFICATIONS ............................................................................................................9
5.1 General.....................................................................................................................95.2 Project Specific.........................................................................................................9
APPENDICES
APPENDIX 1 WINDOW & GARDEN KEYAPPENDIX 2 DAYLIGHT AND SUNLIGHT RESULTSAPPENDIX 3 OVERSHADOWING TO GARDENS AND OPEN SPACES
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB Page 2
1 EXECUTIVE SUMMARY
1.1 Overview
1.1.1 Right of Light Consulting has been commissioned by Pocket Living (2013) LLP to
undertake a daylight and sunlight study of the proposed development at 47 Gainsford
Road, London E17 6QB.
1.1.2 The aim of the study is to assess the impact of the development on the light
receivable by the neighbouring properties at 39 to 49A & 38 to 58 Gainsford Road
and 38 to 58 & 65 to 81 Erskine Road. The study is based on the various numerical
tests laid down in the Building Research Establishment (BRE) guide ‘Site Layout
Planning for Daylight and Sunlight: a guide to good practice’ by P J Littlefair 2011.
1.1.3 The window key in Appendix 1 identifies the windows analysed in this study.
Appendix 2 gives the numerical results of the various daylight and sunlight tests.
1.1.4 The results confirm that the development will have a low impact on the light
receivable by its neighbouring properties. In our opinion there is no daylight or
sunlight related reason why planning permission should not be granted for this
scheme.
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB Page 3
2 INFORMATION SOURCES
2.1 Documents Considered
2.1.1 This report is based on drawings:
GORT SCOTT Architect’s
10-00 Proposed Site Plan Rev –10-10 Proposed Ground Floor Rev C10-11 Proposed First Floor Rev B10-12 Proposed Second Floor Rev B10-13 Proposed Third Floor Rev B10-14 Proposed Roof Plan Rev B20-10 Proposed South and West Elevations Rev A20-11 Proposed North and East Elevations Rev A30-10 Proposed Section AA Rev B30-11 Proposed Section BB Rev B
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB Page 4
3 METHODOLOGY OF THE STUDY
3.1 BRE Guide : Site Layout Planning for Daylight and Sunlight
3.1.1 The study is based on the various numerical tests laid down in the Building Research
Establishment (BRE) guide ‘Site Layout Planning for Daylight and Sunlight: a guide to
good practice’ by P J Littlefair 2011. In general, the BRE tests are based on the
requirements of the British Standard, BS 8206 Part 2.
3.1.2 The standards set out in the BRE guide are intended to be used flexibly. The
following statement is quoted directly from the BRE guide:
3.1.3 “The guide is intended for building designers and their clients, consultants and
planning officials. The advice given here is not mandatory and the guide should not
be seen as an instrument of planning policy; its aim is to help rather than constrain
the designer. Although it gives numerical guidelines, these should be interpreted
flexibly, since natural lighting is only one of many factors in site layout design.”
3.2 Daylight to Windows
3.2.1 Diffuse daylight is the light received from the sun which has been diffused through the
sky. Even on a cloudy day, when the sun is not visible, a room will continue to be lit
with light from the sky. This is diffuse daylight.
Diffuse daylight calculations should be undertaken to all rooms where daylight is
required, including living rooms, kitchens and bedrooms. Usually, if a kitchen is less
than 13m2, it is considered to be a non-habitable room and the daylight tests need not
be applied. The BRE guide states that windows to bathrooms, toilets, storerooms,
circulation areas and garages need not be analysed.
3.2.2 The BRE guide contains two tests which measure diffuse daylight:
3.2.3 Test 1 Vertical Sky Component
The percentage of the sky visible from the centre of a window is known as the
Vertical Sky Component. Diffuse daylight may be adversely affected if after a
development the Vertical Sky Component is both less than 27% and less than 0.8
times its former value.
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB Page 5
3.2.4 Test 2 Daylight Distribution
The BRE guide states that where room layouts are known, the impact on the
daylighting distribution can be found by plotting the ‘no sky line’ in each of the main
rooms. The no sky line is a line which separates areas of the working plane that do
and do not have a direct view of the sky. Daylight may be adversely affected if, after
the development, the area of the working plane in a room which can receive direct
skylight is reduced to less than 0.8 times its former value.
3.3 Sunlight availability to Windows
3.3.1 The BRE sunlight tests should be applied to all main living rooms and conservatories
which have a window which faces within 90 degrees of due south. The guide states
that kitchens and bedrooms are less important, although care should be taken not to
block too much sunlight.
3.3.2 The BRE guide states that sunlight availability may be adversely affected if the centre
of the window:
receives less than 25% of annual probable sunlight hours, or less than 5% of
annual probable sunlight hours between 21 September and 21 March and
receives less than 0.8 times its former sunlight hours during either period and
has a reduction in sunlight received over the whole year greater than 4% of
annual probable sunlight hours.
3.4 Overshadowing to Gardens and Open Spaces
3.4.1 The availability of sunlight should be checked for all open spaces where sunlight is
required. This would normally include:
Gardens, usually the main back garden of a house Parks and playing fields Children’s playgrounds Outdoor swimming pools and paddling pools Sitting out areas, such as those between non-domestic buildings and in public
squares Focal points for views such as a group of monuments or fountains.
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB Page 6
3.4.2 The BRE guide recommends that at least 50% of the area of each amenity space
listed above should receive at least two hours of sunlight on 21 March. If as a result
of new development an existing garden or amenity area does not meet the above,
and the area which can receive two hours of sunlight on 21 March is less than 0.8
times its former value, then the loss of light is likely to be noticeable.
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB Page 7
4 RESULTS OF THE STUDY
4.1 Windows & Amenity Areas Considered
4.1.1 Appendix 1 provides a plan and photographs to indicate the positions of the windows
and gardens analysed in this study.
4.2 Numerical Results
4.2.1 Appendix 2 lists the detailed numerical daylight and sunlight test results. The results
are interpreted below.
4.3 Daylight to Windows
4.3.1 All main habitable room windows pass the Vertical Sky Component test. The
proposed development therefore satisfies the BRE daylight requirements.
4.4 Sunlight to Windows
4.4.1 All windows which face within 90 degrees of due south have been tested for direct
sunlight. All main habitable room windows pass both the total annual sunlight hours
test and the winter sunlight hours test (annual probable sunlight hours between 21
September and 21 March). The proposed development therefore satisfies the BRE
direct sunlight to windows requirements.
4.5 Overshadowing to Gardens and Open Spaces
4.5.1 The results of the overshadowing test show that each of the gardens after the
development receive at least two hours of sunlight on 21 March to at least 50% of its
area with the exception of Garden 13 at 45A Gainsford Road. However, Garden 13
receives less than the recommended amount of sunlight before the proposed
development. This is a result of the garden being north facing and the urban location
of the site. We are therefore of the opinion that it is impractical to avoid the minor
transgression of the BRE recommendations in this instance.
4.6 Conclusion
4.6.1 The results confirm that the development will have a low impact on the light
receivable by its neighbouring properties. In our opinion there is no daylight or
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB Page 8
sunlight related reason why planning permission should not be granted for this
scheme.
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB Page 9
5 CLARIFICATIONS
5.1 General
5.1.1 The report provided is solely for the use of the client and no liability to anyone else is
accepted.
5.1.2 We have undertaken the survey following the guidelines of the RICS publication
“Surveying Safely”.
5.1.3 We have used our best endeavours to ensure all relevant windows within the
neighbouring properties have been identified.
5.1.4 Where limited access is available, reasonable assumptions will have been made.
5.1.5 We have adopted the conventional approach of assessing all habitable rooms within
domestic properties.
5.1.6 Right of Light Consulting have endeavoured to include in the report those matters,
which they have knowledge of or of which they have been made aware, that might
adversely affect the validity of the opinion given.
5.2 Project Specific
5.2.1 None
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB
APPENDICES
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB
APPENDIX 1
WINDOW & GARDEN KEY
Pro
jectN
am
e:
Dra
win
gT
itle
:
Dra
win
gN
o:
Re
v.
De
tails
ofre
visi
on
Win
do
w&
Ga
rden
Key
Win
do
w1
G1
Sca
le:
Rev
Date
Pro
po
sed
Develo
pm
ent
58 Gainsford Road
Bu
rle
yH
ouse
15
-1
7H
igh
Str
eet
Ra
yle
igh
Ess
ex
SS
67
EW
Tel.
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w.r
ight-
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om
Windows 1 to 3Window 4
Windows 5 & 7Window 6Window 8
Windows 9 & 11Window 10Windows 12 to 14
Windows 15 to 19Window 20
Windows 21 & 23Window 22
Window 24
Windows 25 & 27Window 26Window 28
Windows 29 to 32
Window 33
Windows 34 to 36
Window 37
Window 38
Windows 39 & 41Window 40
Window 42
Window 43
Windows 44 & 46Window 45Windows 47 to 49
Windows 50 to 52
Window 53Window 54
Window 55
Windows 56 & 58Window 57
Window 59
Window 60
Windows 61 & 63Window 62Windows 64 to 67
Windows 68 to 70Window 71
Windows 72 & 74Window 73
Window 75
Windows 76 & 78Window 77Windows 79 to 82Windows 83 to 85
Window 86
Window 87
Windows 88 & 90Window 89(Roof Light)
(Roof Light)
(Roof Light)
(Roof Light)
(Roof Light)
(Roof Light)
(Roof Light)
(Roof Light)
56 Gainsford Road
54 Gainsford Road
52 Gainsford Road
50 Gainsford Road
48 Gainsford Road
46 Gainsford Road
44 Gainsford Road
42 Gainsford Road
40 Gainsford Road
38 Gainsford Road
Pro
jectN
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Win
do
w&
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rden
Key
Win
do
w1
G1
Sca
le:
Rev
Date
Pro
pose
d
Deve
lopm
ent
81E
rski
neR
oad
(Roo
fLi
ght)
Bu
rle
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ouse
15
-1
7H
igh
Str
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Ra
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Ess
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67
EW
Tel.
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Win
dow
s
91
&93
Win
do
w92
Win
dow
s
94
&96W
indo
ws
95&
97
Win
do
ws
98&
99W
indo
w10
0
Win
do
w10
1
Win
do
w10
2W
indo
w10
3W
indo
w10
4
Win
do
w10
5W
indo
w10
6W
indo
w10
7
Win
dow
s
108
&10
9
Win
do
w11
0
Win
do
ws
113
to11
5
Win
do
w11
6
Win
dow
s
117
&11
8
Win
do
w11
9W
indo
w12
0
Win
do
ws
121
&12
2
Win
do
w12
3
Win
do
ws
124
&12
5
Win
do
w12
6W
indo
w12
7
Win
do
ws
128
&12
9
Win
do
w13
0W
indo
w13
1W
indo
w13
2
Win
do
ws
133
to13
6
Win
do
w13
7
Win
dow
s
138
to14
0
Win
do
w14
1W
indo
w14
2
Win
do
ws
143
to14
5W
indo
w14
6W
indo
w14
7
Win
do
w14
8
Win
do
w14
9
Win
do
w15
0W
indo
w15
1W
indo
w15
2W
indo
ws
153
&15
4
Win
do
w15
5
Win
do
w15
7
Win
dow
s15
8&
161
Win
dow
s15
9&
160
Win
dow
162
Win
dow
s16
3&
164
79E
rski
neR
oad
77
Ers
kine
Road
75
Ers
kine
Road 7
3E
rski
neR
oad
71
Ers
kine
Road
69
Ers
kine
Road 6
7E
rski
neR
oad
(Roo
fLi
ght)
(Roo
fLi
ght)
(Roo
fLi
ght)
(Roo
fLi
ght)
65
Ers
kine
Road
(Roo
fLi
ght)
Win
do
ws
111
&11
2
Win
do
w15
6
Pro
jectN
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e:
Dra
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:
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Re
v.
De
tails
ofre
visi
on
Win
do
w&
Ga
rden
Key
Win
do
w1
G1
Sca
le:
Rev
Date
G1
Proposed
Development
38 Erskine Road
(Roof Light)
Bu
rle
yH
ouse
15
-1
7H
igh
Str
eet
Ra
yle
igh
Ess
ex
SS
67
EW
Tel.
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4836
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Window 165
Window 166
Window 167
Window 168
Window 169Window 170
Windows 171 & 172
Windows 173 & 174
Window 175Windows
176 to 179
Window 180
Window 181
Window 182
Window 183
Window 184
Windows 185 to187
Windows 188 to190
Window 191
Window 192Window 193
Windows
194 to 197
Windows 198 & 199
(Roof Light)
G2
G3
Windows 200 & 201
Windows
202 to 205
Window 206
Window 207
Window 208
Window 209
Windows 210 & 211
Window 212
Window 213Window 214
Windows
215 to 218
Windows 219 & 220
Window 221
(Roof Light)
Windows 222 & 223
Windows
224 to 227
Window 228Window 229
Window 230
Window 231
Window 232
Windows 233 & 235
Windows
236 to 239
Windows 240 & 241
Windows 242 & 243
Windows
244 to 247
Window 248Window 249
Window 250
Windows 251 & 253
Window 252
Window 254
Window 255Window 256
Windows
257 to 260
Windows 261 & 262
Windows 263 & 264
Windows
265 to 268
Window 269 Window 270
Windows 271 to274
Window 275
Windows 276 & 278
Window 277
Windows
280 to 283
Windows 284, 285 & 287Window 286
G4
G5
G6
G7
G8
G9
G10
G11
40 Erskine Road
42 Erskine Road
44 Erskine Road
46 Erskine Road
48 Erskine Road
50 Erskine Road52 Erskine Road
54 Erskine Road56 Erskine Road
58 Erskine Road
Window 234
Window 279
Pro
jectN
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e:
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visi
on
Win
do
w&
Ga
rden
Key
Win
do
w1
G1
Sca
le:
Rev
Date
G12
Proposed
Development
49A
Gainsford
Road
Bu
rle
yH
ouse
15
-1
7H
igh
Str
eet
Ra
yle
igh
Ess
ex
SS
67
EW
Tel.
0800
197
4836
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w.r
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Windows288&290
Window289
Windows291&292
Windows293&294
Windows295&296
Windows297&298
Windows299&300
Windows301&302
Windows303&304
Window305
45aGainsfordRoad45GainsfordRoad 43GainsfordRoad
41GainsfordRoad39GainsfordRoad
G16
G13
G14
G15
Neighbouring Windows
38 Gainsford Road
40 Gainsford Road
1
2
3
456
7
8910
11
12
13
14
42 Gainsford Road
44 Gainsford Road
1516
17
18
19
202122
23
242526
2930
31
44 Gainsford Road
46 Gainsford Road
27
28 Roof Light
32
33Roof Light
34
35
383940
46 Gainsford Road
48 Gainsford Road
36
37 Roof Light
41
42 Roof Light
434445
46
47
48
49
50 Gainsford Road
50 Gainsford Road
50
51
52
5354
555657
58
59
Roof Lights
52 Gainsford Road
54 Gainsford Road
606162
63
6465
66
67
68
69
70
717273
74
56 Gainsford Road
58 Gainsford Road
757677
78
7980
81
82
83
84
85
86
878889
90
Roof Light
65 Erskine Road
65 Erskine Road
9192
93
9495
96
97
98
99
65 Erskine Road
67 Erskine Road
100101
102
103
104
105
106
107
108
109
110
Roof Light
111
112
69 Erskine Road
71 Erskine Road
113
114
115
116
117
118
119120
121
122
123
124
125
73 Erskine Road
75 Erskine Road
126127
128
129
130
131
132 Roof Light
133
134
135
136
137
138
139
140
141142
Roof Lights
77 Erskine Road
77 Erskine Road
143144145
146
147
148
149
150
79 Erskine Road
79 Erskine Road
151
152 Roof Light
153
154
155
157
156
81 Erskine Road
58 Erskine Road
158
159
160
161
162
163
164
165166167
168
169
170171
172
Garden 1
56 Erskine Road
56 Erskine Road
173
175
176
177178
179
180
181
182
184
174
Roof Light
183
Garden 2
54 Erskine Road
52 Erskine Road
185188190
191
193
194195
196
197
198
199
Roof Light
200201
Garden 3
Garden 4
186187189
192
52 Erskine Road
50 Erskine Road
202
203204
205
206
207
208
210
211
212
213
214
215
216
217 218
219
220
221 Roof Light
Garden 5
209
48 Erskine Road
48 Erskine Road
222223
224
225226
227
228
229
230
231
232
Garden 6
46 Erskine Road
46 Erskine Road
233
235
236
237
238
240
241
Garden 7
234
239
44 Erskine Road
44 Erskine Road
242
243
244
245
246
247
248
249250251
252
253
Garden 8
42 Erskine Road
40 Erskine Road
254255
256
257
258 259
260
261
262
263
264
265
266267
268
269270
271
275
Garden 9
Garden 10
272273274
38 Erskine Road
38 Erskine Road
276
278
279
280281
282
283
284285
286287
Garden 11
277
39 Gainsford Road
41 Gainsford Road
288289
290
291
292
Garden 12
Garden 13
43 Gainsford Road
45 Gainsford Road
293
294
295
296
Garden 14
Garden 15
45a Gainsford Road
49A Gainsford Road
297
298
299
300
301
302
303
304
305
Garden 16
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB
APPENDIX 2
DAYLIGHT AND SUNLIGHT RESULTS
Reference Use Class
Before After Loss Ratio
38 Gainsford Road
Window 1 Non Habitable 23.5% 22.3% 1.2% 0.95
Window 2 Non Habitable 9.2% 8.0% 1.2% 0.87
Window 3 Habitable 35.7% 34.5% 1.2% 0.97
Window 4 Habitable 28.2% 27.8% 0.4% 0.99
Window 5 Habitable 32.2% 30.3% 1.9% 0.94
Window 6 Habitable 26.1% 23.8% 2.3% 0.91
Window 7 Habitable 35.7% 34.3% 1.4% 0.96
40 Gainsford Road
Window 8 Habitable 27.7% 26.9% 0.8% 0.97
Window 9 Habitable 32.8% 30.3% 2.5% 0.92
Window 10 Habitable 28.3% 25.5% 2.8% 0.9
Window 11 Habitable 36.0% 34.4% 1.6% 0.96
Window 12 Non Habitable 32.2% 29.2% 3.0% 0.91
Window 13 Non Habitable 33.5% 30.8% 2.7% 0.92
Window 14 Habitable 36.0% 34.1% 1.9% 0.95
42 Gainsford Road
Window 15 Non Habitable 21.7% 18.6% 3.1% 0.86
Window 16 Non Habitable 22.3% 19.8% 2.5% 0.89
Window 17 Non Habitable 24.0% 21.2% 2.8% 0.88
Window 18 Non Habitable 13.5% 10.9% 2.6% 0.81
Window 19 Habitable 36.0% 33.8% 2.2% 0.94
Window 20 Habitable 28.7% 27.2% 1.5% 0.95
Window 21 Habitable 33.1% 29.4% 3.7% 0.89
Window 22 Habitable 27.3% 23.7% 3.6% 0.87
Window 23 Habitable 36.0% 33.5% 2.5% 0.93
44 Gainsford Road
Window 24 Habitable 28.3% 26.3% 2.0% 0.93
Window 25 Habitable 33.6% 29.3% 4.3% 0.87
Window 26 Habitable 28.6% 24.9% 3.7% 0.87
Window 27 Habitable 36.2% 33.5% 2.7% 0.93
Appendix 2 - Vertical Sky Component
47 Gainsford Road, London E17 6QB
Vertical Sky Component
Reference Use Class
Before After Loss Ratio
Appendix 2 - Vertical Sky Component
47 Gainsford Road, London E17 6QB
Vertical Sky Component
Window 28 Habitable 83.3% 83.0% 0.3% 1.0
Window 29 Non Habitable 22.1% 17.7% 4.4% 0.8
Window 30 Non Habitable 22.1% 18.6% 3.5% 0.84
Window 31 Non Habitable 10.9% 6.9% 4.0% 0.63
Window 32 Habitable 36.2% 33.2% 3.0% 0.92
Window 33 Habitable 85.6% 85.2% 0.4% 1.0
46 Gainsford Road
Window 34 Non Habitable 33.1% 28.3% 4.8% 0.85
Window 35 Non Habitable 34.1% 29.7% 4.4% 0.87
Window 36 Habitable 36.2% 32.8% 3.4% 0.91
Window 37 Habitable 84.1% 83.6% 0.5% 0.99
Window 38 Habitable 29.2% 26.4% 2.8% 0.9
Window 39 Habitable 33.6% 28.4% 5.2% 0.85
Window 40 Habitable 27.1% 23.1% 4.0% 0.85
Window 41 Habitable 36.2% 32.6% 3.6% 0.9
Window 42 Habitable 81.4% 81.0% 0.4% 1.0
48 Gainsford Road
Window 43 Habitable 28.4% 25.2% 3.2% 0.89
Window 44 Habitable 33.7% 28.3% 5.4% 0.84
Window 45 Habitable 28.9% 24.9% 4.0% 0.86
Window 46 Habitable 36.4% 32.7% 3.7% 0.9
Window 47 Non Habitable 32.9% 27.4% 5.5% 0.83
Window 48 Non Habitable 34.0% 29.0% 5.0% 0.85
Window 49 Habitable 36.4% 32.5% 3.9% 0.89
50 Gainsford Road
Window 50 Non Habitable 33.0% 27.6% 5.4% 0.84
Window 51 Non Habitable 34.2% 29.2% 5.0% 0.85
Window 52 Habitable 36.3% 32.3% 4.0% 0.89
Window 53 Habitable 84.2% 83.8% 0.4% 1.0
Window 54 Habitable 85.2% 84.7% 0.5% 0.99
Window 55 Habitable 29.8% 25.8% 4.0% 0.87
Reference Use Class
Before After Loss Ratio
Appendix 2 - Vertical Sky Component
47 Gainsford Road, London E17 6QB
Vertical Sky Component
Window 56 Habitable 33.4% 27.8% 5.6% 0.83
Window 57 Habitable 26.6% 23.0% 3.6% 0.86
Window 58 Habitable 36.2% 32.1% 4.1% 0.89
Window 59 Habitable 81.5% 81.0% 0.5% 0.99
52 Gainsford Road
Window 60 Habitable 28.4% 24.5% 3.9% 0.86
Window 61 Habitable 33.5% 28.0% 5.5% 0.84
Window 62 Habitable 28.1% 24.9% 3.2% 0.89
Window 63 Habitable 36.2% 32.4% 3.8% 0.9
Window 64 Non Habitable 22.1% 17.9% 4.2% 0.81
Window 65 Non Habitable 23.1% 18.1% 5.0% 0.78
Window 66 Non Habitable 9.7% 5.2% 4.5% 0.54
Window 67 Habitable 36.1% 32.3% 3.8% 0.89
54 Gainsford Road
Window 68 Non Habitable 32.5% 27.6% 4.9% 0.85
Window 69 Non Habitable 33.3% 28.7% 4.6% 0.86
Window 70 Habitable 35.9% 32.4% 3.5% 0.9
Window 71 Habitable 29.4% 25.3% 4.1% 0.86
Window 72 Habitable 33.1% 28.2% 4.9% 0.85
Window 73 Habitable 26.6% 24.3% 2.3% 0.91
Window 74 Habitable 35.7% 32.5% 3.2% 0.91
56 Gainsford Road
Window 75 Habitable 28.2% 24.4% 3.8% 0.87
Window 76 Habitable 32.9% 28.8% 4.1% 0.88
Window 77 Habitable 27.4% 25.9% 1.5% 0.95
Window 78 Habitable 35.8% 33.0% 2.8% 0.92
Window 79 Non Habitable 31.4% 27.7% 3.7% 0.88
Window 80 Non Habitable 31.5% 28.0% 3.5% 0.89
Window 81 Non Habitable 33.3% 30.1% 3.2% 0.9
Window 82 Habitable 35.6% 33.1% 2.5% 0.93
Reference Use Class
Before After Loss Ratio
Appendix 2 - Vertical Sky Component
47 Gainsford Road, London E17 6QB
Vertical Sky Component
58 Gainsford Road
Window 83 Non Habitable 30.9% 27.6% 3.3% 0.89
Window 84 Non Habitable 32.8% 29.9% 2.9% 0.91
Window 85 Habitable 35.4% 33.3% 2.1% 0.94
Window 86 Habitable 84.7% 84.4% 0.3% 1.0
Window 87 Habitable 28.9% 25.9% 3.0% 0.9
Window 88 Habitable 31.7% 28.9% 2.8% 0.91
Window 89 Habitable 26.9% 26.0% 0.9% 0.97
Window 90 Habitable 35.2% 33.4% 1.8% 0.95
65 Erskine Road
Window 91 Habitable 34.6% 34.2% 0.4% 0.99
Window 92 Habitable 31.9% 31.6% 0.3% 0.99
Window 93 Habitable 37.4% 36.9% 0.5% 0.99
Window 94 Habitable 27.3% 27.1% 0.2% 0.99
Window 95 Habitable 15.1% 15.1% 0.0% 1.0
Window 96 Habitable 29.2% 28.9% 0.3% 0.99
Window 97 Habitable 21.8% 21.5% 0.3% 0.99
Window 98 Habitable 22.4% 22.0% 0.4% 0.98
Window 99 Habitable 35.1% 34.7% 0.4% 0.99
Window 100 Habitable 23.0% 22.6% 0.4% 0.98
Window 101 Habitable 29.4% 29.0% 0.4% 0.99
67 Erskine Road
Window 102 Habitable 34.3% 33.7% 0.6% 0.98
Window 103 Habitable 20.0% 19.3% 0.7% 0.97
Window 104 Habitable 33.9% 33.0% 0.9% 0.97
Window 105 Habitable 12.2% 11.0% 1.2% 0.9
Window 106 Habitable 33.6% 32.0% 1.6% 0.95
Window 107 Habitable 58.5% 58.2% 0.3% 0.99
Window 108 Habitable 23.5% 21.4% 2.1% 0.91
Window 109 Habitable 35.4% 33.3% 2.1% 0.94
Window 110 Habitable 39.1% 38.4% 0.7% 0.98
Window 111 Habitable 27.6% 27.4% 0.2% 0.99
Reference Use Class
Before After Loss Ratio
Appendix 2 - Vertical Sky Component
47 Gainsford Road, London E17 6QB
Vertical Sky Component
Window 112 Habitable 23.6% 23.5% 0.1% 1.0
69 Erskine Road
Window 113 Habitable 4.3% 3.9% 0.4% 0.91
Window 114 Habitable 22.6% 21.7% 0.9% 0.96
Window 115 Habitable 28.3% 27.8% 0.5% 0.98
Window 116 Habitable 14.5% 14.4% 0.1% 0.99
Window 117 Habitable 31.0% 29.9% 1.1% 0.96
Window 118 Habitable 35.6% 34.8% 0.8% 0.98
71 Erskine Road
Window 119 Habitable 24.2% 23.7% 0.5% 0.98
Window 120 Habitable 25.1% 25.0% 0.1% 1.0
Window 121 Habitable 33.6% 32.5% 1.1% 0.97
Window 122 Habitable 37.5% 36.8% 0.7% 0.98
Window 123 Habitable 26.0% 24.1% 1.9% 0.93
Window 124 Habitable 34.7% 33.7% 1.0% 0.97
Window 125 Habitable 38.6% 38.0% 0.6% 0.98
73 Erskine Road
Window 126 Habitable 21.7% 21.5% 0.2% 0.99
Window 127 Habitable 24.7% 24.6% 0.1% 1.0
Window 128 Habitable 31.6% 30.6% 1.0% 0.97
Window 129 Habitable 38.9% 38.3% 0.6% 0.98
Window 130 Habitable 36.5% 35.4% 1.1% 0.97
Window 131 Habitable 38.7% 38.0% 0.7% 0.98
Window 132 Habitable 87.3% 87.3% 0.0% 1.0
75 Erskine Road
Window 133 Habitable 26.8% 26.8% 0.0% 1.0
Window 134 Habitable 25.5% 25.5% 0.0% 1.0
Window 135 Habitable 24.9% 24.9% 0.0% 1.0
Window 136 Bedroom 36.7% 35.7% 1.0% 0.97
Window 137 Habitable 87.4% 87.4% 0.0% 1.0
Reference Use Class
Before After Loss Ratio
Appendix 2 - Vertical Sky Component
47 Gainsford Road, London E17 6QB
Vertical Sky Component
Window 138 Habitable 14.1% 14.1% 0.0% 1.0
Window 139 Bedroom 32.5% 32.6% -0.1% 1.0
Window 140 Bedroom 39.0% 38.5% 0.5% 0.99
Window 141 Habitable 87.4% 87.4% 0.0% 1.0
Window 142 Habitable 87.4% 87.4% 0.0% 1.0
77 Erskine Road
Window 143 Habitable 33.0% 32.2% 0.8% 0.98
Window 144 Habitable 33.4% 32.5% 0.9% 0.97
Window 145 Habitable 17.6% 17.6% 0.0% 1.0
Window 146 Habitable 23.6% 23.4% 0.2% 0.99
Window 147 Habitable 14.6% 14.6% 0.0% 1.0
Window 148 Habitable 2.9% 2.9% 0.0% 1.0
Window 149 Non Habitable 35.9% 35.4% 0.5% 0.99
Window 150 Habitable 35.7% 35.2% 0.5% 0.99
79 Erskine Road
Window 151 Habitable 15.6% 15.6% 0.0% 1.0
Window 152 Habitable 36.7% 36.4% 0.3% 0.99
Window 153 Habitable 32.9% 32.4% 0.5% 0.98
Window 154 Habitable 39.1% 38.8% 0.3% 0.99
Window 155 Habitable 36.7% 36.2% 0.5% 0.99
Window 156 Habitable 21.6% 21.2% 0.4% 0.98
Window 157 Habitable 39.1% 38.8% 0.3% 0.99
81 Erskine Road
Window 158 Habitable 20.8% 20.9% -0.1% 1.0
Window 159 Habitable 11.7% 11.7% 0.0% 1.0
Window 160 Habitable 7.1% 7.1% 0.0% 1.0
Window 161 Habitable 36.6% 36.2% 0.4% 0.99
Window 162 Habitable 27.4% 27.4% 0.0% 1.0
Window 163 Habitable 8.2% 8.2% 0.0% 1.0
Window 164 Habitable 32.0% 32.0% 0.0% 1.0
Reference Use Class
Before After Loss Ratio
Appendix 2 - Vertical Sky Component
47 Gainsford Road, London E17 6QB
Vertical Sky Component
58 Erskine Road
Window 165 Habitable 32.3% 31.5% 0.8% 0.98
Window 166 Habitable 31.6% 30.9% 0.7% 0.98
Window 167 Habitable 32.5% 31.6% 0.9% 0.97
Window 168 Habitable 21.6% 21.3% 0.3% 0.99
Window 169 Habitable 10.1% 9.8% 0.3% 0.97
Window 170 Habitable 35.5% 35.0% 0.5% 0.99
Window 171 Habitable 13.0% 12.4% 0.6% 0.95
Window 172 Habitable 27.6% 27.1% 0.5% 0.98
56 Erskine Road
Window 173 Habitable 13.0% 13.0% 0.0% 1.0
Window 174 Habitable 28.8% 28.7% 0.1% 1.0
Window 175 Habitable 80.9% 80.8% 0.1% 1.0
Window 176 Habitable 2.6% 2.6% 0.0% 1.0
Window 177 Habitable 8.1% 8.1% 0.0% 1.0
Window 178 Habitable 19.8% 19.8% 0.0% 1.0
Window 179 Habitable 20.9% 20.9% 0.0% 1.0
Window 180 Habitable 17.9% 17.9% 0.0% 1.0
Window 181 Habitable 23.3% 23.3% 0.0% 1.0
Window 182 Habitable 32.3% 31.2% 1.1% 0.97
Window 183 Habitable 32.7% 31.6% 1.1% 0.97
Window 184 Habitable 35.8% 35.1% 0.7% 0.98
54 Erskine Road
Window 185 Habitable 32.3% 31.2% 1.1% 0.97
Window 186 Habitable 32.3% 31.2% 1.1% 0.97
Window 187 Habitable 32.2% 31.2% 1.0% 0.97
Window 188 Habitable 28.9% 29.1% -0.2% 1.01
Window 189 Habitable 25.3% 25.5% -0.2% 1.01
Window 190 Habitable 25.6% 25.8% -0.2% 1.01
Window 191 Habitable 75.9% 75.7% 0.2% 1.0
Window 192 Habitable 19.1% 19.1% 0.0% 1.0
Window 193 Habitable 36.0% 35.2% 0.8% 0.98
Reference Use Class
Before After Loss Ratio
Appendix 2 - Vertical Sky Component
47 Gainsford Road, London E17 6QB
Vertical Sky Component
Window 194 Habitable 18.7% 18.1% 0.6% 0.97
Window 195 Habitable 7.1% 7.1% 0.0% 1.0
Window 196 Habitable 1.6% 1.6% 0.0% 1.0
Window 197 Habitable 18.7% 18.7% 0.0% 1.0
Window 198 Habitable 9.2% 8.7% 0.5% 0.95
Window 199 Habitable 22.7% 22.1% 0.6% 0.97
52 Erskine Road
Window 200 Habitable 11.2% 11.2% 0.0% 1.0
Window 201 Habitable 27.6% 27.0% 0.6% 0.98
Window 202 Habitable 0.6% 0.6% 0.0% 1.0
Window 203 Habitable 5.0% 5.0% 0.0% 1.0
Window 204 Habitable 15.8% 15.3% 0.5% 0.97
Window 205 Habitable 21.6% 21.6% 0.0% 1.0
Window 206 Habitable 14.8% 14.8% 0.0% 1.0
Window 207 Habitable 29.1% 28.2% 0.9% 0.97
Window 208 Habitable 36.0% 35.2% 0.8% 0.98
50 Erskine Road
Window 209 Habitable 32.2% 31.7% 0.5% 0.98
Window 210 Habitable 30.8% 30.3% 0.5% 0.98
Window 211 Habitable 31.9% 31.5% 0.4% 0.99
Window 212 Habitable 20.7% 20.8% -0.1% 1.0
Window 213 Habitable 19.6% 19.5% 0.1% 0.99
Window 214 Habitable 36.2% 35.3% 0.9% 0.98
Window 215 Habitable 20.7% 20.5% 0.2% 0.99
Window 216 Habitable 8.9% 8.9% 0.0% 1.0
Window 217 Habitable 2.2% 2.2% 0.0% 1.0
Window 218 Habitable 24.3% 24.2% 0.1% 1.0
Window 219 Habitable 8.5% 8.5% 0.0% 1.0
Window 220 Habitable 24.9% 24.4% 0.5% 0.98
Window 221 Habitable 35.4% 35.4% 0.0% 1.0
Reference Use Class
Before After Loss Ratio
Appendix 2 - Vertical Sky Component
47 Gainsford Road, London E17 6QB
Vertical Sky Component
48 Erskine Road
Window 222 Habitable 10.6% 10.3% 0.3% 0.97
Window 223 Habitable 22.6% 22.0% 0.6% 0.97
Window 224 Habitable 0.3% 0.3% 0.0% 1.0
Window 225 Habitable 4.0% 4.0% 0.0% 1.0
Window 226 Habitable 14.7% 14.4% 0.3% 0.98
Window 227 Habitable 19.9% 19.7% 0.2% 0.99
Window 228 Habitable 12.9% 12.8% 0.1% 0.99
Window 229 Habitable 19.1% 19.0% 0.1% 0.99
Window 230 Habitable 30.6% 30.4% 0.2% 0.99
Window 231 Habitable 32.5% 32.0% 0.5% 0.98
Window 232 Habitable 36.1% 35.2% 0.9% 0.98
46 Erskine Road
Window 233 Habitable 25.7% 24.9% 0.8% 0.97
Window 234 Habitable 19.6% 19.6% 0.0% 1.0
Window 235 Habitable 36.4% 35.5% 0.9% 0.98
Window 236 Habitable 22.1% 21.3% 0.8% 0.96
Window 237 Habitable 8.2% 8.2% 0.0% 1.0
Window 238 Habitable 1.9% 1.9% 0.0% 1.0
Window 239 Habitable 0.1% 0.1% 0.0% 1.0
Window 240 Habitable 9.5% 8.9% 0.6% 0.94
Window 241 Habitable 24.5% 24.0% 0.5% 0.98
44 Erskine Road
Window 242 Habitable 9.2% 8.9% 0.3% 0.97
Window 243 Habitable 25.0% 24.3% 0.7% 0.97
Window 244 Habitable 0.7% 0.7% 0.0% 1.0
Window 245 Habitable 5.1% 5.1% 0.0% 1.0
Window 246 Habitable 17.6% 17.0% 0.6% 0.97
Window 247 Habitable 22.2% 22.1% 0.1% 1.0
Window 248 Habitable 16.3% 16.3% 0.0% 1.0
Window 249 Habitable 21.1% 21.2% -0.1% 1.0
Window 250 Habitable 32.8% 31.7% 1.1% 0.97
Reference Use Class
Before After Loss Ratio
Appendix 2 - Vertical Sky Component
47 Gainsford Road, London E17 6QB
Vertical Sky Component
Window 251 Habitable 29.2% 28.0% 1.2% 0.96
Window 252 Habitable 28.2% 27.1% 1.1% 0.96
Window 253 Habitable 36.7% 35.7% 1.0% 0.97
42 Erskine Road
Window 254 Habitable 34.5% 33.3% 1.2% 0.97
Window 255 Habitable 20.2% 20.2% 0.0% 1.0
Window 256 Habitable 36.8% 35.9% 0.9% 0.98
Window 257 Habitable 22.3% 21.9% 0.4% 0.98
Window 258 Habitable 8.8% 8.8% 0.0% 1.0
Window 259 Habitable 2.0% 2.0% 0.0% 1.0
Window 260 Habitable 22.9% 22.9% 0.0% 1.0
Window 261 Habitable 8.1% 8.1% 0.0% 1.0
Window 262 Habitable 25.6% 25.4% 0.2% 0.99
40 Erskine Road
Window 263 Habitable 8.5% 8.3% 0.2% 0.98
Window 264 Habitable 25.7% 25.1% 0.6% 0.98
Window 265 Habitable 0.8% 0.8% 0.0% 1.0
Window 266 Habitable 5.3% 5.2% 0.1% 0.98
Window 267 Habitable 17.8% 16.8% 1.0% 0.94
Window 268 Habitable 21.7% 21.5% 0.2% 0.99
Window 269 Habitable 15.4% 15.2% 0.2% 0.99
Window 270 Habitable 14.2% 14.1% 0.1% 0.99
Window 271 Habitable 33.5% 32.0% 1.5% 0.96
Window 272 Habitable 31.2% 29.7% 1.5% 0.95
Window 273 Habitable 32.2% 30.9% 1.3% 0.96
Window 274 Habitable 27.9% 26.7% 1.2% 0.96
Window 275 Habitable 36.9% 36.1% 0.8% 0.98
38 Erskine Road
Window 276 Habitable 33.0% 31.9% 1.1% 0.97
Window 277 Habitable 19.7% 19.7% 0.0% 1.0
Window 278 Habitable 37.0% 36.2% 0.8% 0.98
Reference Use Class
Before After Loss Ratio
Appendix 2 - Vertical Sky Component
47 Gainsford Road, London E17 6QB
Vertical Sky Component
Window 279 Habitable 18.5% 18.5% 0.0% 1.0
Window 280 Habitable 18.8% 18.7% 0.1% 0.99
Window 281 Habitable 7.5% 7.5% 0.0% 1.0
Window 282 Habitable 1.6% 1.6% 0.0% 1.0
Window 283 Habitable 21.3% 21.3% 0.0% 1.0
Window 284 Habitable 7.8% 7.8% 0.0% 1.0
Window 285 Habitable 25.4% 25.3% 0.1% 1.0
Window 286 Habitable 35.1% 34.9% 0.2% 0.99
Window 287 Habitable 38.1% 37.7% 0.4% 0.99
39 Gainsford Road
Window 288 Habitable 14.8% 14.8% 0.0% 1.0
Window 289 Habitable 10.7% 10.7% 0.0% 1.0
Window 290 Habitable 36.9% 36.9% 0.0% 1.0
41 Gainsford Road
Window 291 Habitable 15.6% 15.6% 0.0% 1.0
Window 292 Habitable 36.8% 36.8% 0.0% 1.0
43 Gainsford Road
Window 293 Habitable 14.7% 14.7% 0.0% 1.0
Window 294 Habitable 36.7% 36.7% 0.0% 1.0
45 Gainsford Road
Window 295 Habitable 14.6% 14.6% 0.0% 1.0
Window 296 Habitable 36.4% 36.2% 0.2% 0.99
45a Gainsford Road
Window 297 Habitable 14.4% 14.0% 0.4% 0.97
Window 298 Habitable 36.2% 35.8% 0.4% 0.99
Window 299 Habitable 18.3% 14.7% 3.6% 0.8
Window 300 Habitable 23.2% 19.4% 3.8% 0.84
49A Gainsford Road
Window 301 Habitable 27.5% 23.5% 4.0% 0.85
Reference Use Class
Before After Loss Ratio
Appendix 2 - Vertical Sky Component
47 Gainsford Road, London E17 6QB
Vertical Sky Component
Window 302 Habitable 34.8% 28.0% 6.8% 0.8
Window 303 Habitable 22.7% 20.3% 2.4% 0.89
Window 304 Habitable 34.8% 32.1% 2.7% 0.92
Window 305 Habitable 34.5% 32.9% 1.6% 0.95
Reference Use Class
Before After Loss Ratio Before After Loss Ratio
65 Erskine Road
Window 91 Habitable 55% 54% 1% 0.98 17% 17% 0% 1.0
Window 93 Habitable 57% 56% 1% 0.98 19% 19% 0% 1.0
Window 98 Habitable 20% 18% 2% 0.9 1% 1% 0% 1.0
Window 99 Habitable 51% 51% 0% 1.0 13% 13% 0% 1.0
Window 100 Habitable 21% 20% 1% 0.95 2% 2% 0% 1.0
Window 101 Habitable 35% 34% 1% 0.97 6% 6% 0% 1.0
67 Erskine Road
Window 102 Habitable 62% 62% 0% 1.0 22% 22% 0% 1.0
Window 103 Habitable 20% 19% 1% 0.95 0% 0% 0% 1.0
Window 104 Habitable 54% 53% 1% 0.98 13% 13% 0% 1.0
Window 105 Habitable 21% 20% 1% 0.95 0% 0% 0% 1.0
Window 106 Habitable 57% 55% 2% 0.96 16% 15% 1% 0.94
Window 107 Habitable 55% 55% 0% 1.0 15% 15% 0% 1.0
Window 108 Habitable 41% 38% 3% 0.93 6% 5% 1% 0.83
Window 109 Habitable 60% 57% 3% 0.95 19% 17% 2% 0.89
Window 110 Habitable 60% 60% 0% 1.0 20% 20% 0% 1.0
69 Erskine Road
Window 113 Habitable 4% 4% 0% 1.0 0% 0% 0% 1.0
Window 114 Habitable 21% 20% 1% 0.95 2% 1% 1% 0.5
Window 115 Habitable 36% 36% 0% 1.0 3% 3% 0% 1.0
Window 116 Habitable 24% 24% 0% 1.0 2% 2% 0% 1.0
Window 117 Habitable 42% 42% 0% 1.0 7% 7% 0% 1.0
Window 118 Habitable 54% 52% 2% 0.96 13% 11% 2% 0.85
71 Erskine Road
Window 119 Habitable 36% 35% 1% 0.97 3% 2% 1% 0.67
Window 120 Habitable 42% 42% 0% 1.0 8% 8% 0% 1.0
Window 121 Habitable 51% 50% 1% 0.98 11% 10% 1% 0.91
Window 122 Habitable 58% 56% 2% 0.97 17% 15% 2% 0.88
Window 123 Habitable 52% 49% 3% 0.94 18% 16% 2% 0.89
Window 124 Habitable 55% 55% 0% 1.0 15% 15% 0% 1.0
Appendix 2 - Sunlight to Windows
47 Gainsford Road, London E17 6QB
Sunlight to Windows
Total Sunlight Hours Winter Sunlight Hours
Reference Use Class
Before After Loss Ratio Before After Loss Ratio
Appendix 2 - Sunlight to Windows
47 Gainsford Road, London E17 6QB
Sunlight to Windows
Total Sunlight Hours Winter Sunlight Hours
Window 125 Habitable 60% 60% 0% 1.0 19% 19% 0% 1.0
73 Erskine Road
Window 126 Habitable 28% 28% 0% 1.0 1% 1% 0% 1.0
Window 127 Habitable 41% 41% 0% 1.0 8% 8% 0% 1.0
Window 128 Habitable 53% 52% 1% 0.98 18% 17% 1% 0.94
Window 129 Habitable 60% 60% 0% 1.0 19% 19% 0% 1.0
Window 130 Habitable 61% 60% 1% 0.98 20% 19% 1% 0.95
Window 131 Habitable 61% 60% 1% 0.98 20% 19% 1% 0.95
Window 132 Habitable 87% 87% 0% 1.0 27% 27% 0% 1.0
75 Erskine Road
Window 136 Bedroom 58% 58% 0% 1.0 19% 19% 0% 1.0
Window 137 Habitable 87% 87% 0% 1.0 27% 27% 0% 1.0
Window 139 Bedroom 51% 50% 1% 0.98 10% 9% 1% 0.9
Window 140 Bedroom 62% 62% 0% 1.0 21% 21% 0% 1.0
Window 141 Habitable 87% 87% 0% 1.0 27% 27% 0% 1.0
Window 142 Habitable 87% 87% 0% 1.0 27% 27% 0% 1.0
77 Erskine Road
Window 143 Habitable 52% 51% 1% 0.98 14% 13% 1% 0.93
Window 144 Habitable 54% 53% 1% 0.98 16% 15% 1% 0.94
Window 146 Habitable 27% 27% 0% 1.0 4% 4% 0% 1.0
Window 149 Non Habitable 52% 51% 1% 0.98 16% 15% 1% 0.94
Window 150 Habitable 58% 58% 0% 1.0 20% 20% 0% 1.0
79 Erskine Road
Window 151 Habitable 39% 39% 0% 1.0 11% 11% 0% 1.0
Window 152 Habitable 55% 55% 0% 1.0 19% 19% 0% 1.0
Window 153 Habitable 55% 55% 0% 1.0 20% 20% 0% 1.0
Window 154 Habitable 64% 64% 0% 1.0 23% 23% 0% 1.0
Window 155 Habitable 62% 62% 0% 1.0 22% 22% 0% 1.0
Window 156 Habitable 54% 54% 0% 1.0 21% 21% 0% 1.0
Window 157 Habitable 64% 64% 0% 1.0 23% 23% 0% 1.0
Reference Use Class
Before After Loss Ratio Before After Loss Ratio
Appendix 2 - Sunlight to Windows
47 Gainsford Road, London E17 6QB
Sunlight to Windows
Total Sunlight Hours Winter Sunlight Hours
81 Erskine Road
Window 158 Habitable 22% 22% 0% 1.0 2% 2% 0% 1.0
Window 161 Habitable 63% 63% 0% 1.0 23% 23% 0% 1.0
Window 163 Habitable 9% 9% 0% 1.0 0% 0% 0% 1.0
Window 164 Habitable 48% 48% 0% 1.0 9% 9% 0% 1.0
58 Erskine Road
Window 165 Habitable 72% 71% 1% 0.99 24% 23% 1% 0.96
Window 166 Habitable 72% 71% 1% 0.99 23% 22% 1% 0.96
Window 167 Habitable 73% 72% 1% 0.99 23% 22% 1% 0.96
Window 168 Habitable 44% 42% 2% 0.95 16% 14% 2% 0.88
Window 169 Habitable 24% 24% 0% 1.0 10% 10% 0% 1.0
Window 170 Habitable 78% 78% 0% 1.0 25% 25% 0% 1.0
Window 171 Habitable 24% 24% 0% 1.0 9% 9% 0% 1.0
Window 172 Habitable 57% 57% 0% 1.0 19% 19% 0% 1.0
56 Erskine Road
Window 173 Habitable 20% 20% 0% 1.0 6% 6% 0% 1.0
Window 174 Habitable 57% 57% 0% 1.0 15% 15% 0% 1.0
Window 175 Habitable 91% 91% 0% 1.0 28% 28% 0% 1.0
Window 178 Habitable 31% 31% 0% 1.0 6% 6% 0% 1.0
Window 182 Habitable 74% 72% 2% 0.97 24% 22% 2% 0.92
Window 183 Habitable 76% 75% 1% 0.99 24% 23% 1% 0.96
Window 184 Habitable 79% 79% 0% 1.0 26% 26% 0% 1.0
54 Erskine Road
Window 185 Habitable 73% 72% 1% 0.99 23% 22% 1% 0.96
Window 186 Habitable 75% 73% 2% 0.97 23% 21% 2% 0.91
Window 187 Habitable 74% 72% 2% 0.97 22% 20% 2% 0.91
Window 188 Habitable 50% 48% 2% 0.96 18% 16% 2% 0.89
Window 189 Habitable 48% 46% 2% 0.96 17% 15% 2% 0.88
Window 190 Habitable 46% 46% 0% 1.0 17% 17% 0% 1.0
Window 191 Habitable 86% 86% 0% 1.0 25% 25% 0% 1.0
Reference Use Class
Before After Loss Ratio Before After Loss Ratio
Appendix 2 - Sunlight to Windows
47 Gainsford Road, London E17 6QB
Sunlight to Windows
Total Sunlight Hours Winter Sunlight Hours
Window 192 Habitable 36% 35% 1% 0.97 17% 16% 1% 0.94
Window 193 Habitable 79% 79% 0% 1.0 26% 26% 0% 1.0
Window 194 Habitable 33% 31% 2% 0.94 15% 13% 2% 0.87
Window 195 Habitable 20% 18% 2% 0.9 9% 7% 2% 0.78
Window 197 Habitable 40% 40% 0% 1.0 14% 14% 0% 1.0
Window 198 Habitable 18% 17% 1% 0.94 6% 5% 1% 0.83
Window 199 Habitable 41% 41% 0% 1.0 14% 14% 0% 1.0
52 Erskine Road
Window 200 Habitable 17% 17% 0% 1.0 3% 3% 0% 1.0
Window 201 Habitable 56% 56% 0% 1.0 14% 14% 0% 1.0
Window 204 Habitable 24% 22% 2% 0.92 7% 5% 2% 0.71
Window 207 Habitable 62% 61% 1% 0.98 13% 12% 1% 0.92
Window 208 Habitable 80% 80% 0% 1.0 26% 26% 0% 1.0
50 Erskine Road
Window 209 Habitable 75% 76% -1% 1.01 21% 22% -1% 1.05
Window 210 Habitable 72% 74% -2% 1.03 19% 21% -2% 1.11
Window 211 Habitable 76% 77% -1% 1.01 22% 23% -1% 1.05
Window 212 Habitable 36% 38% -2% 1.06 10% 12% -2% 1.2
Window 213 Habitable 37% 37% 0% 1.0 14% 14% 0% 1.0
Window 214 Habitable 81% 81% 0% 1.0 27% 27% 0% 1.0
Window 215 Habitable 35% 35% 0% 1.0 15% 15% 0% 1.0
Window 216 Habitable 20% 20% 0% 1.0 9% 9% 0% 1.0
Window 218 Habitable 45% 45% 0% 1.0 15% 15% 0% 1.0
Window 219 Habitable 19% 19% 0% 1.0 5% 5% 0% 1.0
Window 220 Habitable 52% 52% 0% 1.0 18% 18% 0% 1.0
48 Erskine Road
Window 222 Habitable 19% 19% 0% 1.0 4% 4% 0% 1.0
Window 223 Habitable 40% 40% 0% 1.0 11% 11% 0% 1.0
Window 226 Habitable 22% 22% 0% 1.0 5% 5% 0% 1.0
Window 230 Habitable 74% 73% 1% 0.99 20% 19% 1% 0.95
Window 231 Habitable 76% 77% -1% 1.01 22% 23% -1% 1.05
Reference Use Class
Before After Loss Ratio Before After Loss Ratio
Appendix 2 - Sunlight to Windows
47 Gainsford Road, London E17 6QB
Sunlight to Windows
Total Sunlight Hours Winter Sunlight Hours
Window 232 Habitable 81% 81% 0% 1.0 27% 27% 0% 1.0
46 Erskine Road
Window 233 Habitable 56% 55% 1% 0.98 22% 21% 1% 0.95
Window 234 Habitable 37% 37% 0% 1.0 17% 17% 0% 1.0
Window 235 Habitable 82% 81% 1% 0.99 28% 27% 1% 0.96
Window 236 Habitable 36% 36% 0% 1.0 17% 17% 0% 1.0
Window 237 Habitable 20% 20% 0% 1.0 9% 9% 0% 1.0
Window 239 Habitable 0% 0% 0% 1.0 0% 0% 0% 1.0
Window 240 Habitable 13% 13% 0% 1.0 6% 6% 0% 1.0
Window 241 Habitable 53% 53% 0% 1.0 18% 18% 0% 1.0
44 Erskine Road
Window 242 Habitable 16% 16% 0% 1.0 3% 3% 0% 1.0
Window 243 Habitable 45% 45% 0% 1.0 10% 10% 0% 1.0
Window 246 Habitable 28% 28% 0% 1.0 8% 8% 0% 1.0
Window 250 Habitable 76% 74% 2% 0.97 23% 21% 2% 0.91
Window 251 Habitable 66% 65% 1% 0.98 17% 15% 2% 0.88
Window 252 Habitable 64% 63% 1% 0.98 14% 13% 1% 0.93
Window 253 Habitable 81% 81% 0% 1.0 27% 27% 0% 1.0
42 Erskine Road
Window 254 Habitable 79% 79% 0% 1.0 25% 25% 0% 1.0
Window 255 Habitable 37% 37% 0% 1.0 17% 17% 0% 1.0
Window 256 Habitable 80% 81% -1% 1.01 26% 27% -1% 1.04
Window 257 Habitable 35% 35% 0% 1.0 16% 16% 0% 1.0
Window 258 Habitable 21% 21% 0% 1.0 9% 9% 0% 1.0
Window 260 Habitable 42% 42% 0% 1.0 15% 15% 0% 1.0
Window 261 Habitable 14% 14% 0% 1.0 7% 7% 0% 1.0
Window 262 Habitable 53% 53% 0% 1.0 18% 18% 0% 1.0
40 Erskine Road
Window 263 Habitable 13% 13% 0% 1.0 6% 6% 0% 1.0
Window 264 Habitable 48% 48% 0% 1.0 10% 10% 0% 1.0
Reference Use Class
Before After Loss Ratio Before After Loss Ratio
Appendix 2 - Sunlight to Windows
47 Gainsford Road, London E17 6QB
Sunlight to Windows
Total Sunlight Hours Winter Sunlight Hours
Window 267 Habitable 28% 28% 0% 1.0 8% 8% 0% 1.0
Window 271 Habitable 71% 72% -1% 1.01 23% 23% 0% 1.0
Window 272 Habitable 65% 65% 0% 1.0 18% 18% 0% 1.0
Window 273 Habitable 70% 71% -1% 1.01 18% 18% 0% 1.0
Window 274 Habitable 57% 58% -1% 1.02 12% 12% 0% 1.0
Window 275 Habitable 79% 79% 0% 1.0 26% 26% 0% 1.0
38 Erskine Road
Window 276 Habitable 71% 71% 0% 1.0 23% 23% 0% 1.0
Window 277 Habitable 38% 38% 0% 1.0 14% 14% 0% 1.0
Window 278 Habitable 79% 79% 0% 1.0 25% 25% 0% 1.0
Window 279 Habitable 34% 34% 0% 1.0 13% 13% 0% 1.0
Window 280 Habitable 31% 31% 0% 1.0 12% 12% 0% 1.0
Window 281 Habitable 18% 18% 0% 1.0 6% 6% 0% 1.0
Window 283 Habitable 45% 45% 0% 1.0 14% 14% 0% 1.0
Window 284 Habitable 15% 15% 0% 1.0 5% 5% 0% 1.0
Window 285 Habitable 52% 52% 0% 1.0 16% 16% 0% 1.0
Window 286 Habitable 76% 76% 0% 1.0 24% 24% 0% 1.0
Window 287 Habitable 82% 81% 1% 0.99 28% 27% 1% 0.96
Reference
Ratio
58 Erskine Road
Garden 1 59.1 m2 45.89 m2 78% 45.89 m2 78% 0.0 m2 0% 1.0
56 Erskine Road
Garden 2 47.58 m2 42.8 m2 90% 43.17 m2 91% -0.37 m2 -1% 1.01
54 Erskine Road
Garden 3 46.5 m2 41.12 m2 88% 39.55 m2 85% 1.56 m2 3% 0.97
52 Erskine Road
Garden 4 55.09 m2 46.75 m2 85% 40.68 m2 74% 6.07 m2 11% 0.87
50 Erskine Road
Garden 5 46.46 m2 27.71 m2 60% 29.0 m2 62% -1.29 m2 -2% 1.03
48 Erskine Road
Garden 6 52.25 m2 27.49 m2 53% 32.45 m2 62% -4.96 m2 -9% 1.17
46 Erskine Road
Garden 7 65.91 m2 55.56 m2 84% 55.42 m2 84% 0.14 m2 0% 1.0
44 Erskine Road
Garden 8 51.58 m2 42.54 m2 82% 40.21 m2 78% 2.34 m2 4% 0.95
42 Erskine Road
Garden 9 51.96 m2 42.99 m2 83% 42.46 m2 82% 0.53 m2 1% 0.99
40 Erskine Road
Garden 10 53.21 m2 43.12 m2 81% 43.12 m2 81% 0.0 m2 0% 1.0
38 Erskine Road
Garden 11 62.2 m2 51.19 m2 82% 51.19 m2 82% 0.0 m2 0% 1.0
39 Gainsford Road
Garden 12 48.06 m2 17.47 m2 36% 17.47 m2 36% 0.0 m2 0% 1.0
41 Gainsford Road
Garden 16 48.62 m2 16.02 m2 33% 16.02 m2 33% 0.0 m2 0% 1.0
43 Gainsford Road
Garden 15 51.92 m2 20.17 m2 39% 20.17 m2 39% 0.0 m2 0% 1.0
45 Gainsford Road
Appendix 2 - Overshadowing to Gardens and Open Spaces
47 Gainsford Road, London E17 6QB
Total Area Area receiving at least two hours of sunlight on 21st March
Before After Loss
Reference
Appendix 2 - Overshadowing to Gardens and Open Spaces
47 Gainsford Road, London E17 6QB
Total Area Area receiving at least two hours of sunlight on 21st March
Garden 14 45.35 m2 13.83 m2 31% 13.0 m2 29% 0.83 m2 2% 0.94
45a Gainsford Road
Garden 13 52.78 m2 23.56 m2 45% 14.9 m2 28% 8.66 m2 17% 0.62
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB
APPENDIX 3
OVERSHADOWING TO GARDENS AND OPEN SPACES
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G1
38 Erskine Road
G2
G3
G4
G5
G7
G8
G9
G10
G11
40 Erskine Road
42 Erskine Road44 Erskine Road
46 Erskine Road48 Erskine Road
50 Erskine Road52 Erskine Road
54 Erskine Road56 Erskine Road
58 Erskine Road
G6
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G12
45aGainsfordRoad
45GainsfordRoad
43GainsfordRoad
41GainsfordRoad
39GainsfordRoad
G16
G13
G14
G15
Daylight and Sunlight Study (Within Development)47 Gainsford Road, London E17 6QB
12 May 2016
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB
Right of Light Consulting
Burley House15-17 High StreetRayleighEssex SS6 7EW
Tel: 0800 197 4836
DAYLIGHT AND SUNLIGHT STUDY Page 147 Gainsford Road, London E17 6QB
CONTENTS
1 EXECUTIVE SUMMARY ...................................................................................................2
1.1 Overview ..................................................................................................................2
2 INFORMATION SOURCES...............................................................................................3
2.1 Documents Considered ............................................................................................3
3 METHODOLOGY OF THE STUDY ...................................................................................4
3.1 BRE Guide : Site Layout Planning for Daylight and Sunlight.....................................43.2 Interior Daylighting....................................................................................................43.3 Sunlight to Windows .................................................................................................6
4 RESULTS OF THE STUDY...............................................................................................8
4.1 Window Reference Points.........................................................................................84.2 Numerical Results and No Sky Line Contours ..........................................................84.3 Interior Daylighting....................................................................................................84.4 Sunlight to Windows .................................................................................................84.5 Conclusion................................................................................................................8
5 CLARIFICATIONS ............................................................................................................9
5.1 General.....................................................................................................................95.2 Project Specific.........................................................................................................9
APPENDICES
APPENDIX 1 WINDOW KEYAPPENDIX 2 DAYLIGHT CALCULATIONSAPPENDIX 3 NO SKY LINE CONTOURS
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB Page 2
1 EXECUTIVE SUMMARY
1.1 Overview
1.1.1 Right of Light Consulting has been commissioned by Pocket Living (2013) LLP to
undertake a daylight and sunlight study in connection with the development at 47
Gainsford Road, London E17 6QB. The aim of the study is to check whether or not
the proposed Flat G12 on the ground floor receive satisfactory levels of daylight and
sunlight.
1.1.2 The study is based on the numerical tests laid down in the Building Research
Establishment (BRE) guide ‘Site Layout Planning for Daylight and Sunlight: a good
practice guide’ by P J Littlefair 2011.
1.1.3 Appendix 1 identifies the windows analysed in this study. The numerical test results
(including all calculation workings) are provided in Appendix 2. No sky line contours
are presented in Appendix 3.
1.1.4 Right of Light Consulting confirms that the proposed design satisfies all of the
requirements set out in the BRE guide ‘Site Layout Planning for Daylight and
Sunlight’.
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB Page 3
2 INFORMATION SOURCES
2.1 Documents Considered
2.1.1 This report is based on the following drawings:
GORT SCOTT Architects
10-10 Proposed Ground Floor Rev C20-10 Proposed South and West Elevations Rev A20-11 Proposed North and East Elevations Rev A30-10 Proposed Section Rev B30-11 Proposed Section Rev B
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB Page 4
3 METHODOLOGY OF THE STUDY
3.1 BRE Guide : Site Layout Planning for Daylight and Sunlight
3.1.1 The study is based on the numerical tests laid down in the Building Research
Establishment (BRE) guide ‘Site Layout Planning for Daylight and Sunlight: a good
practice guide’ by P J Littlefair 2011.
3.1.2 The standards set out in the BRE guide are intended to be used flexibly. In instances
where there is a special requirement for daylight or sunlight, higher levels may be
deemed necessary. In other situations, such as with urban developments, lower
daylight and sunlight levels may be unavoidable. The following statement is quoted
directly from the BRE guide:
3.1.3 “The guide is intended for building designers and their clients, consultants and
planning officials. The advice given is not mandatory and this document should not
be considered as an instrument of planning policy. Its aim is to help rather than
constrain the designer. Although it gives numerical guidelines, these should be
interpreted flexibly because natural lighting is only one of the many factors in site
layout design.”
3.2 Interior Daylighting
3.2.1 The interior daylighting recommendations set out in BRE guide are based on British
Standard BS 8206 Part 2 and the Chartered Institute of Building Services Engineers
Applications Manual on window design. Collectively, the guides set out three main
criteria for interior daylighting. These are summarised as follows:
3.2.2 Test 1 Average Daylight Factor (df)
The Average Daylight Factor can be calculated using the following formula:
df = T Aw θ . %A (1-R2)
Where
T is the diffuse visible transmittance of the glazing (BRE standard of 0.68)Aw is the net glazed area of the window (m2)A is the total area of the room surfaces (m2)R is their average reflectanceΘ is the angle of visible sky in degrees
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB Page 5
The Average Daylight factor test is applied to habitable rooms within domestic
properties. A kitchen is generally deemed to be a habitable room if it is large enough
to accommodate a dining area. If the kitchen is small or if the property has a
separate dining area then the accepted practice is to treat the kitchen as a non
habitable room.
For the purpose of this study we have assumed BRE internal reflectance values
pertaining to medium wooden floors, light painted walls and white painted ceilings.
The guide recommends an Average Daylight Factor of 5% or more if there is no
supplementary electric lighting, or 2% or more if supplementary lighting is provided.
There are additional minimum recommendations for dwellings of 2% for kitchens,
1.5% for living rooms and 1% for bedrooms.
A special procedure is required for floor to ceiling windows such as patio doors. If
part of a window is below the height of the working plane (a horizontal plane 0.85m
above the floor in housing), this portion should be treated as a separate window. The
ADF for this window has an extra factor applied to it, to take account of the reduced
effectiveness of low level glazing in lighting the room. A value equal to the floor
reflectance may be taken for this factor. The ADF for the portion of the window above
the working plane is calculated in the normal way without this additional factor, and
the ADFs for the two portions are added together.
3.2.3 Test 2 Room Depth
If a daylit room is lit by windows in one wall only, the depth of the room L should not
exceed the limiting value given by:
L + L ≤ . 2 .W H 1-Rb
Where
W is the room widthH is the window-head height above floor levelRb is the average reflectance of the surfaces in the rear half of the room
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB Page 6
3.2.4 Test 3 Position of the no sky line
If a significant area of the working plane lies beyond the no sky line (i.e. it receives no
direct skylight), then the distribution of daylight in the room will look poor and
supplementary electric lighting will be required.
The no sky line assessment is not applicable where a room derives its daylight solely
from a light well or atrium. In these situations the room relies on borrowed light
instead of direct skylight.
3.3 Sunlight to Windows
3.3.1 The BRE guide recommends that where possible each dwelling should have at least
one main living room window that faces within 90 degrees of due south. However,
the guide acknowledges that this is not always possible when it comes to flats.
3.3.2 The BRE sunlight tests should be applied to all main living rooms and conservatories
which have a window which faces within 90 degrees of due south. The guide states
that sunlight is viewed as less important in kitchens and bedrooms. In non-domestic
buildings, any spaces which are deemed to have a specific requirement for sunlight
should be checked.
3.3.3 The BRE guide recommends that main living room windows should receive 25% of
the total annual probable sunlight hours, including 5% of the annual probable sunlight
hours during the winter months between 21st September and 21st March.
3.4 Overshadowing to Gardens and Open Spaces
3.4.1 The availability of sunlight should be checked for all open spaces where sunlight is
required. This would normally include:
Gardens, usually the main back garden of a house Parks and playing fields Children’s playgrounds Outdoor swimming pools and paddling pools Sitting out areas, such as those between non-domestic buildings and in public
squares Focal points for views such as a group of monuments or fountains.
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB Page 7
3.4.2 The BRE guide recommends that for an open space to appear adequately lit
throughout the year, at least 50% of its area should receive two hours of sunlight on
21st March
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB Page 8
4 RESULTS OF THE STUDY
4.1 Window Reference Points
4.1.1 Refer to Appendix 1 for a drawing which identifies the positions of the windows
analysed in this study. We have tested the windows to flat G12 on the basis that, due
to its orientation and position within the scheme, it is likely to be the unit that receives
the least sunlight and daylight and if this satisfies the BRE requirements, the windows
to the other flats are likely to surpass the BRE minimum requirements by an even
greater margin.
4.2 Numerical Results and No Sky Line Contours
4.2.1 The numerical test results including all calculation workings are provided in Appendix
2. No sky line contours for the habitable rooms are presented in Appendix 3.
4.3 Interior Daylighting
4.3.1 All rooms meet or surpass the BRE Average Daylight Factor targets.
4.3.2 All rooms pass the room depth test.
4.3.3 The BRE guide does not give fixed numerical pass/fail criteria for the No Sky Line test
when applied to new dwellings (guidance is given for when this test is applied to
existing neighbouring buildings). However, for completeness, we have illustrated the
no sky line contours in Appendix 3.
4.4 Sunlight to Windows
4.4.1 The living room windows do not face within 90 degrees of due south and will
therefore not receive ideal levels of direct sunlight. However, the BRE guide
acknowledges that it is not always possible for every dwelling to be well situated to
receive direct sunlight. The proposed development therefore satisfies the BRE direct
sunlight to windows requirements.
4.5 Conclusion
4.5.1 Right of Light Consulting confirms that the proposed design satisfies all of the
requirements set out in the BRE guide ‘Site Layout Planning for Daylight and
Sunlight’.
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB Page 9
5 CLARIFICATIONS
5.1 General
5.1.1 The report provided is solely for the use of the client and no liability to anyone else is
accepted.
5.1.2 We have undertaken the survey following the guidelines of the RICS publication
“Surveying Safely”.
5.1.3 Where limited access is available, reasonable assumptions will have been made.
5.1.4 Right of Light Consulting have endeavoured to include in the report those matters,
which they have knowledge of or of which they have been made aware, that might
adversely affect the validity of the opinion given.
5.1.5 Right of Light Consulting will notify those instructing them immediately and confirm in
writing if for any reason the report requires any correction or qualification.
5.1.6 Right of Light Consulting confirm that they have used their best endeavours to ensure
that the facts stated in this report are correct and that the opinions expressed
represent a true and complete professional opinion.
5.2 Project Specific
5.2.1 None.
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB
APPENDICES
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB
APPENDIX 1
WINDOW KEY
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of-
ligh
t-co
nsultin
g.c
om
Win
dow
1
Win
dow
2
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB
APPENDIX 2
DAYLIGHT CALCULATIONS
Refe
rence
Prim
ary
room
use
AD
FT
Aw
AR
Theta
AD
FR
esult
Gro
und
Flo
or
(Fla
tG
12)
Win
dow
1(low
er)
0.6
80
.79
81
.04
0.6
95
1.5
0.3
%
Win
dow
1(u
pper)
0.6
82
.67
81
.04
0.6
95
7.5
2.5
%
To
tal
AD
Ffo
rro
om
Liv
ing
/Kitc
he
n/D
inin
g2
.0%
2.8
%P
ass
Win
dow
2(low
er)
0.6
80
.45
2.3
80
.71
46
.80
.2%
Win
dow
2(u
pper)
0.6
81
.34
52
.38
0.7
15
2.2
1.8
%
To
tal
AD
Ffo
rro
om
Be
dro
om
1.0
%2.0
%P
ass
Ap
pen
dix
2-
Avera
ge
Daylig
ht
Facto
r(A
DF
)
47
Gain
sfo
rdR
oad
,L
on
do
nE
17
6Q
B Targ
et
AD
Fbased
on
room
use
Avera
ge
Dayl
ight
Facto
rC
oeff
icie
nts
Actu
alA
DF
Room
Result
LW
HR
bL/W
+L/H
<=
2/1
-Rb
Gro
und
Flo
or
(Fla
tG
12)
Win
dow
16
.23
.22
.50
.69
4.4
2<
=6
.51
Pa
ss
Win
dow
23
.82
.92
.50
.71
2.8
3<
=6
.89
Pa
ss
Ap
pen
dix
2-
Ro
om
Dep
thC
alc
ula
tio
n
47
Gain
sfo
rdR
oad
,L
on
do
nE
17
6Q
B
Room
Depth
Coeff
icie
nts
Room
Depth
Calc
ula
tion
DAYLIGHT AND SUNLIGHT STUDY47 Gainsford Road, London E17 6QB
APPENDIX 3
NO SKY LINE CONTOURS
Ke
y:
Pro
ject
Nam
e:
Dra
win
gT
itle:
Dra
win
gN
o:
Sca
le:
Re
v.
Re
vD
ate
Deta
ilso
fre
visi
on
Pro
po
sed
Gro
und
floor
at
Gain
sford
Road
Ap
pen
dix
3N
oS
ky
Lin
eC
on
tou
rs
1
Are
are
ceiv
es
no
dir
ect
sky
ligh
t(a
pp
lied
toh
ab
itab
lero
om
s)
Are
ad
oe
sre
ce
ive
dire
ctsk
ylig
ht.
Lig
ht
ap
ert
ure
.
Bu
rle
yH
ouse
15
-1
7H
igh
Str
eet
Ra
yle
igh
Ess
ex
SS
67
EW
Tel.
0800
197
4836
enq
uirie
s@
rig
ht-
of-
ligh
t.co
.uk
ww
w.r
ight-
of-
ligh
t-co
nsultin
g.c
om
Win
dow
1
Win
dow
2