Flat roof area to be provided 13mm with white
chippings on 3 layers hot bonded Ruberoid roofing
felt on 126mm Celotex TD400 Insulation on firrings
laid min 1:60 fall on 175 x 50 @ 400cc C16 flat roof joists.
Provide lead flashing to suitably
seal between flat roof and pitched roof.
Provide velux windows
fitted in accordance with
manufacturers requirements.
Allow for double rafters each
side. Velux GGL 78x118
Strip off extg jack rafters and provide new
100x50 rafters to match. Provide FR 4000 50mm Celotex
insulation within rafters so that 50mm of ventilation
is maintained over. Provide FR4000 90mm to
underside of rafters, provide 12.5 mm plaster
board over with skim finish.
Flank window to be provided with obscure
glass and top light opener only
3.45m
3.90m
Tiles to match existing on tile battens on
tyvek pro V underlay on 19mm plywood
or OSB boarding on 125x50 @ 400cc
vertical studs filled with 120mm GA400
Celotex insulation Provide 12.5mm plasterboard
and set internally. Provide 9mm masterboard where
within 1m of boundary
3.05m
3.05m
2.70m
7.61m
Provide code 4 lead
flashing where dormer
meets extg
Alter and extend existing
stack to vent min 900mm
above windows.
Front Elevation
Flank Elevation
Flat roof area to be provided 13mm with white
chippings on 3 layers hot bonded Ruberoid roofing
felt on 126mm Celotex TD400 Insulation on firrings
laid min 1:60 fall on 175 x 50 @ 400cc C16 flat roof joists.
Provide lead flashing to suitably
seal between flat roof and pitched roof.
Proposed windows to be double glazed
with argon fill and low emmisivity coating. Max
U value to be 1.6W/m2k. Suggest Pilkington K glass.
Tiles to match existing on tile battens on
tyvek pro V underlay on 19mm plywood
or OSB boarding on 125x50 @ 400cc
vertical studs filled with 120mm GA400
Celotex insulation Provide 12.5mm plasterboard
and set internally. Provide 9mm masterboard where
within 1m of boundary
3.45m
Tiles to match existing on tile battens on
tyvek pro V underlay on 19mm plywood
or OSB boarding on 125x50 @ 400cc
vertical studs filled with 120mm GA400
Celotex insulation Provide 12.5mm plasterboard
and set internally. Provide 9mm masterboard where
within 1m of boundary
5.85m
3.90m
2.70m
2.70m
Provide code 4 lead
flashing where dormer
meets extg
Provide code 4 lead
flashing where dormer
meets extg
Provide inward opening french doors and
juliet balcony in accordance with specialist
design. Min height 1100mm
Note height of doors max 1900mm to allow
for roof construction
Flank Elevation
Rear Elevation
Permitted development justification
Gable Extension 7.61mx3.05mx3.90 divided by 4 =22.63m3
Dormer 2.70mx3.45mx5.85m divided by 2 = 27.246m3
Total= 49.876m3
Therefore less than 50 m/cubed allowed for semi detached
property
Meters
0
1
2
3
Client
4
Drawing Title
Proposed Elevations
5m
Job Title
1:100 A1
Mr and Mrs Batchelor
Loft Conversion at402 Hook Road
Chessington. KT9 1NA
Scale
Drawing No
1:100
16/44-04
Date
Drawn By
October 2016
KRS Designs