....................
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CI/SfB (37.4)
Uniclass L414
July 2012
NATURAL DAYLIGHT SOLUTIONS
New
low profile
glazing
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NATURAL DAYLIGHT SOLUTIONS
.NATURAL
. . . . . . . . . . . . .DAYLIGHTING
.........................
G
lidevale market a range of natural
daylighting products including
tubular rooflights, conventional
rooflights, combined rooflight/ventilators
and hybrid lighting systems.
Advantages
● Highly effective at delivering light into
internal and badly-lit spaces without
windows.
● Energy saving - reduces the need for
artificial lighting and helps reduce carbon
footprint.
● Wide range of applications - houses, flats,
schools, hospitals, commercial, industrial
buildings, care homes, nursing homes and
student accommodation.
● Suitable for both new-build and
refurbishment projects.
● Meet the thermal requirements of the
latest building regulations.
● Hybrid natural and artificial lighting
solutions.
Sustainability
The sun is a sustainable light source, and
natural daylight can make a significant
contribution to sustainable building design.
Rooflights are an effective and efficient
means of maximising natural daylight in
dark areas, often virtually eliminating the
need for supplementary electric lighting
during the day.
Glidevale natural daylight systems, used as a
complement to artificial lighting, can
considerably reduce the annual energy
consumption of any building, thereby
reducing CO2 emissions.
Proven benefits of natural light
Scientific studies have shown the positive
benefits of natural daylight for health and
wellbeing in a range of applications.
The CIBSE Office Lighting Guide states that
Natural Daylight is an almost universal
worker requirement. When given a choice,
most people prefer a working environment
with daylight to one without. It references
documented evidence confirming that
excluding daylight leads to increased
numbers of complaints about the working
environment, and may adversely affect
productivity. The Daylight Workplace
Regulations state that “The lighting in every
workplace shall, as far as is reasonably
practical, be by natural light.”
BRE Environmental Assessment Method
The benefits of natural daylighting are
recognised by the Building Research
Establishment (BRE) Environmental
Assessment Method (BREEAM).
BREEAM Modules cover Schools, Offices,
Healthcare, Retail and Industrial buildings.
These buildings are then rated on a scale of
PASS, GOOD, VERY GOOD or EXCELLENT.
Glidevale natural daylight systems can
contribute to the credits available under the
Health and Wellbeing Section HW01 and the
Energy Section E01.
2
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NATURAL DAYLIGHT SOLUTIONS
PRODUCT RANGE
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Sunscoop™ tubular rooflights
Used to bring natural daylight into internal
rooms and spaces that have no, or
insufficient, windows. Natural daylight
enters through a roof-mounted low profile
glazing unit or skylight and is reflected down
a mirrored tube/duct and into the room
below through a ceiling-mounted diffuser.
Particularly useful for rooms and spaces
below another room or a pitched roof. Also
available with occupant sensor and a
daylight controller for integrated low energy
artificial lighting.
A combined light and ventilation unit
(Sunscoop iPSV) is also available.
Sunscoop hybrid
A unique, automatic and energy saving
system combining natural daylight and
luminaire to achieve more consistent
illuminance irrespective of external
conditions
Metrodome modular rooflights
An all-aluminium rooflight and access hatch
range offering ventilation options and
thermal efficiency. Designed for both new
build and refurbishment applications.
Particularly suitable for refurbishment, since
non standard sizes can be made to suit
existing roof openings and kerbs.
Natural daylighting
2
Product range
3
Sunscoop tubular rooflight systems
4
Sunscoop iPSV light & ventilation
10
Sunscoop hybrid
11
Metrodome modular rooflights
12
Metroglazing replacement units
15
Further information
16
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3
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S
unscoop™ Tubular Rooflight systems are
used to bring natural daylight into
internal rooms and spaces that have no, or
insufficient, windows.
Sunscoop Tubular Rooflights consist of a
roof-mounted clear polycarbonate low
profile glazing unit or skylight connected to
a tube with an internal mirrored finish with
98% reflectance. Natural daylight enters the
glazing unit or skylight and is reflected
down the tube and into the room through a
ceiling-mounted diffuser.
Sunscoop advantages
● Highly effective at delivering light into
internal and poorly lit spaces.
● System design and performance are backed
by an unrivalled programme of research.
● Energy saving - reduces the need for
artificial lighting and helps reduce carbon
footprint.
● Natural daylight has positive benefits over
artificial lighting.
● Wide range of applications - houses, flats,
schools, hospitals, commercial and
industrial buildings.
● Range of sizes for different requirements.
● Simple and reliable installation.
● Can be used on pitched and flat roofs.
● Adjustable elbows give flexibility of siting
on tubular systems.
● Complete system meets the thermal
requirements of the latest building
regulations.
● Sunscoop daylighting performance
software calculations available.
● Sunscoop Hybrid systems available,
combining natural and artificial lighting
with integrated intelligent controllers.
Silsoe Research
Institute report
4
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NATURAL DAYLIGHT SOLUTIONS
SUNSCOOP™ TUBULAR ROOFLIGHT SYSTEMS
............................................................................................................
PERFORMANCE
Unique test programme
The performance of the Sunscoop Tubular
Rooflight system has been firmly established
by a unique and extensive period of testing,
unparalleled in the tubular rooflight
industry, carried out by Silsoe Research
Institute (SRI) and BPD. Measurements were
taken over four to six month periods during
the summer/ autumn in all natural light
conditions ranging from bright clear skies to
overcast conditions.
Internal view of different
diameter tubular
rooflights under test
This comprehensive monitoring has for the
first time provided accurate, realistic and
reliable performance data for tubular
rooflight systems including direct and
diffuse lighting conditions.
The research is subject of a published paper
entitled ‘Optimisation & design of ducted
daylight systems: 2010’ which is specific to
Glidevale systems only.
External lux sensor with
shade ring for measuring
diffused light levels
Typical light levels
The light output from the Sunscoop system
depends on the size and length of tubing,
offset angles if any, the external sky
conditions and light levels measured in lux.
The distribution of the light in the room
depends on the diffuser type and the wall,
ceiling and floor reflectances.
A sophisticated in house computer
programme has since been developed to
accurately predict light levels of Sunscoop
systems, based directly on the SRI and BPD
monitoring.
System layout
Sunscoop systems can pass through a roof
space or other void.
For maximum effectiveness the tubing
should be as straight as possible. However,
since it is often impractical to site the ceiling
diffuser directly below the roof-mounted
glazing, the tubing system allows an offset
by means of an elbow. It is adjustable up to
30º from vertical.
Other elbows can be used but monitoring
has shown that these will adversely affect
performance.
Siting
Where possible the roof-mounted glazing
should be located on a south-facing slope to
gain the maximum amount of daylight
under both direct and diffuse conditions.
Factors which need to be considered when
siting a Sunscoop include:
Monitoring of three
tubular rooflights
simultaneously
- Location of the room to be lit and suitable
position of the ceiling diffuser.
- Roof space obstructions.
- Proximity of other buildings, trees etc,
which may cast shadows at certain times
of the day or year.
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5
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NATURAL DAYLIGHT SOLUTIONS
. . . . . . . . .SUNSCOOP
. . . . . . . . . . . . . . . . TUBULAR
. . . . . . . . . . . . . .INSTALLATION
............................
™
Sunscoop on flat roof
Low profile
polycarbonate glazing
Single skin aluminium
upstand
Insulation by others
98% reflective tubing
with insulation
Ceiling diffuser
Sunscoop on pitched roof
Traditional skylight, polyester
powder coated aluminium frame
with polycarbonate glazing
Roof flashing with
AluFlash attached
Square to round adaptor
with integral elbow
98% reflective tubing
Sunscoop on standing seam roof
Low profile
polycarbonate glazing
Site-fabricated
insulated upstand
98% reflective tubing
Adjustable elbow to 30°
Insulation by others
For more information on installation details please
contact Glidevale Technical Services.
6
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NATURAL DAYLIGHT SOLUTIONS
. . . . . . SUNSCOOP
. . . . . . . . . . . . . . . . . TUBULAR
. . . . . . . . . . . . . .ROOF
. . . . . . . . INTERFACE
......................
™
450mm diam. tube
530mm diam. tube
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
Pitched roof flashings
Universal Slate
Universal Tile (All types) ●
Universal Standing seam ●
Traditional Slate
Traditional Tile
✓ ✓
✓ ✓
✓ ✓
✓
✓
✓
✓
✓
✓
Flat roof flashings
Universal Single Ply
Universal Torch on
Universal Standing seam ●
250mm diam. tube
350mm diam. tube
Roof interface flashings
A range of dedicated roof flashings is
available for different types of pitched and
flat roof coverings, as shown below.
✓
✓
✓
✓
✓
●
Pitched roof flashings
Low profile glazing on plain tiles
Requires a site-fabricated upstand.
Health and safety
The Sunscoop glazing and flashings have
been impact-tested to BS EN 1873 Modular
Rooflights and may be deemed to be nonfragile for HSG33 Safety in Roofwork.
Low profile glazing on slate pitched roof
The Sunscoop glazing and flashings have an
AA fire rating to BS 476: Part 3: 2004, and
can therefore be used on roofs without
restriction on number, spacing or position.
Low profile glazing on pitched roof
Specification clause
Natural daylight to …
rooms to be provided by
means of Glidevale
Sunscoop tubular ducted
systems comprising:
Roof-mounted low profile
glazing of 3.0mm clear
uv-stabilised
polycarbonate covered by
10-year warranty against
loss of impact strength,
excessive yellowing and
loss of light transmission.
Roof interface flashing to
be ...
To have AA fire rating to
BS 476: Part 3; 2004.
Tubes and elbows to be
SR98 Mirror with
reflectance 98% and
25-year warranty.
System diameter: 250mm
/ 350mm / 450mm /
530mm.*
Circular recessed ceiling
diffuser of diffused
polycarbonate with whitecapped ABS ceiling ring /
chrome / brass effect /
Skyview diffuser circular /
Skyview diffuser square.*
Options to be fitted:
Polycarbonate secondary
glazing skin, integral
electric light fitting, lightattenuating damper, fire
protection collar.*
All exposed tubes and
elbows within unheated
voids to be wrapped with
tube insulation. System to
achieve an overall U-value
of 2.2W/m2K.*
Supplier: Glidevale Ltd,
2 Brooklands Road, Sale,
Cheshire M33 3SS,
Telephone: 0161 905 5700
Fax: 0161 905 2085.
Email:info@glidevale.com
*delete as applicable
Traditional skylight
Flat roof flashings
Universal single ply on flat roof
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7
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NATURAL DAYLIGHT SOLUTIONS
. . . . . . . . .SUNSCOOP
. . . . . . . . . . . . . . . . .TUBULAR
. . . . . . . . . . . . . COMPONENTS
....................................................
™
Roof-mounted glazing
Sunscoop glazing is manufactured from
3.0mm clear uv-stabilised polycarbonate
with 92% light transmission.
The glazing is available in two types;
Square dome fitted to a builders kerb or
supplied insulated upstand.
Traditional skylight fitted within tile and
slate coverings. For further information see
page 7.
Tubes and elbows
Tubes and elbows are anodised aluminium
with a multi-layer specular coating which
ensures pure white light with no colour
shift, even after multiple reflections down
the light tube / shaft. The material called
SR98 Mirror incorporates a pure super silver
layer and has a total reflectance of 98%.
Anodised aluminium base material
Bonding layer
Both have a 10-year warranty (supported by
the polycarbonate manufacturer) against
loss of impact strength, excessive yellowing
and loss of light transmission.
Pure super silver or pure aluminium layer
Super reflective (LR) oxide layer
Super reflective (HR) oxide layer
The warranty also covers any effects of the
forming process. Not all manufacturers offer
this warranty.
Polycarbonate secondary glazing is also
available to maximise insulation levels along
with the use of tube insulation (supplied
separately).
The multi-layer optical coating system is
atomically bonded to the substrate.
Laminated or glued reflective sheets are not
used.
It has a 25-year product warranty which
guarantees that the material will not splinter,
yellow, darken, peel off, blister, crack or
develop any other surface degradation which
could reduce overall reflectivity, even after
prolonged uv exposure. The finished materials
are electrostatically neutral and will not
attract airborne dust even during installation.
Low profile glazing on plain tiles
Low profile glazing on slate pitched roof
8
Sizes
Tubular systems diameter:
250mm, 350mm, 450mm, or 530mm.
Starter tube length: 300mm.
Elbow adjustment: up to 30°.
Intermediate tube: 600mm.
Can be cut as required on site.
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Integral electric light fitting
The Sunscoop can be supplied with an
optional integral electric light fitting (two on
450 and 530mm systems) which takes a 13W
or 20W low-energy lamp (equivalent to a
65W or 100W conventional lamp). This
avoids the need for an additional light fitting
for night-time use.
Light-attenuating dampers
Control over the light level entering the
room may be required at certain times, for
example in conference rooms, lecture
theatres, classrooms and hospital wards.
Ceiling diffusers
Circular ceiling diffuser
The standard recessed ceiling diffuser for all
tube sizes, designed to maximise light
transmission. Its translucent surface
provides privacy and spreads the light
efficiently throughout the room.
Manufactured from diffused polycarbonate
with white-capped ABS ceiling ring to hide
fixings. Also available in chrome or brass
effect finish.
The optional Sunscoop motorised lightattenuating damper provides this control; it
is actuated from a wall switch, separately
available.
Fire protection collars
In longer Sunscoop systems the tubing may
pass through an intermediate floor or ceiling
that provides fire separation. As with any
ducted system it is important that it does not
form a path for fire.
Fire protection collars providing up to 120
minutes fire resistance to BS 476: Part 20:
1987 are available for all sizes of Sunscoop
Skyview diffuser, circular
Optional for all tube sizes. The innovative
Skyview diffuser consists of a grid of fresnel
lenses which provides a wider spread of light
without excessive losses and enables the sky
to be viewed.
Tube Insulation (supplied separately)
Specifically designed to contribute to the
overall thermal performance of the system.
All exposed tubes and elbows within
unheated voids should be lagged with tube
insulation to reduce heat loss and the risk of
condensation within the tube.
Thermal insulation
Our Technical Services Department can
provide computer calculations of U-values in
different roof constructions using Sunscoop
rooflights, including the use of secondary
glazing skins and/or tube insulation, to
comply with Building Regulations Part L
2010.
Skyview diffuser, square
Optional for 450mm and 530mm tube only.
Similar to the circular Skyview but mounted
in a 600 x 600mm polycarbonate panel
which can be fitted in a suspended ceiling.
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9
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NATURAL DAYLIGHT SOLUTIONS
. . . . . . . . . . . . .SUNSCOOP
. . . . . . . . . . . . . . .iPSV
. . . . . . . . COMBINED
. . . . . . . . . . . . . . . .LIGHT
. . . . . . . . .&
. . .VENTILATION
. . . . . . . . . . . . . . . . . . UNIT
...................
™
T
he Glidevale Sunscoop iPSV™ system is
designed to provide both natural daylight
and ventilation to bathrooms, toilets,
kitchens, en suites and other similar areas,
in both domestic and commercial
applications.
Natural daylight enters through a roofmounted glazing unit and is reflected down
the highly reflective tubing through
a Skyview ceiling diffuser. This innovative
diffuser consists of a grid of fresnel lenses
which provides a wider spread of light
without excessive losses and enables the sky
to be viewed.
Ventilation is controlled by the ‘intelligent’
extract operated by a series of nylon bands,
which respond to humidity levels and
regulate the size of the air opening.
TT9 Versatile tile ventilator
Utilising a separate ducting system allows
optimum performance from both units - the
shortest possible length to maximise natural
daylight through the ceiling diffuser and a
separate duct for the extract to optimum
length for the stack effect.
Low profile glazing on
Universal tile flashing
Flexible ducting
(support and insulation
omitted for clarity)
Ceiling (insulation omitted for clarity)
10
SR 98 Mirror reflective tube
guides daylight down to the
ceiling diffuser (insulation
omitted for clarity)
Key features
● No electrical connection or power source
is required so the system is naturally
energy efficient.
Intelligent humidity controlled extract
responds automatically to changes in
relative humidity giving greater
ventilation when humidity is high whilst
preventing unnecessary ventilation and
heat loss when humidity is low.
● 24 hour condensation control with gentle
extraction - operates all day and every day
as required combating condensation and
mould growth.
● Completely silent in operation.
● Complies with the requirements of
Approved Document F.
● Minimal maintenance - no mechanical
components to go wrong. No costly solar
panels or battery backups.
● Automatic response and no operating
controls, ideal for special needs
applications.
● Tests by Building Research Establishment
(BRE) have shown an intelligent passive
stack system incorporating a humidity
sensitive extract gives a 15 - 40% saving
in ventilation heat loss dependent on
occupancy levels.
● Thermal modelling by De Montfort
University has shown that the intelligent
passive stack system operates effectively
even in summer months and internal
bathrooms. The research also
demonstrated effectiveness even in very
airtight dwellings.
● Can be supplied with optional integral
electric light fitting which takes a low
energy bulb to avoid the need for
additional light fitting for night time use.
Size
250mm diameter Sunscoop Ventilation unit
area provides 12,270mm2 at maximum
humidity with 125mm ducting.
Combined extract ventilator
and Skyview diffuser
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NATURAL DAYLIGHT SOLUTIONS
. . . . . . . . . . . . . . . . . . . .SUNSCOOP
. . . . . . . . . . . . . . . . .HYBRID
..............................
™
T
he Sunscoop™ hybrid is a 350mm unit
with a daylight controlled dimmable low
energy compact fluorescent luminaire
integrated into the ceiling diffuser assembly
to provide a more consistent light level
despite changing external daylight
conditions.
The CIBSE Lighting Guide 10 - Daylighting
states that: “Case studies have shown that in
a conventionally daylit commercial building
the choice of control can make 30-40%
difference to the resulting light use”.
The Sunscoop hybrid has a control unit
which controls both occupancy and daylight
levels, maximising the energy savings from
lighting.
Key features
● The Sunscoop hybrid incorporates a light
sensor which is programmed to turn on
when the light level inside the room drops
below a certain level.
● Luminaire turns on with optional ‘soft
start’, allowing a gradual increase in light
output and adjustment to the required
level.
● The Sunscoop hybrid incorporates a
lighting controller, lux sensor and PIR
presence detector.
● When the unit determines there is
adequate natural light available, the lamp
is automatically turned off.
● When light levels fall, the lamp is
switched back on and its output continues
to be regulated by the daylight sensor.
● The programmable PIR presence detector
will turn off the lamp when the space is
unoccupied irrespective of the light level.
Ceiling Diffuser / Luminaire
The unit comprises a 350mm standard
diffuser with option for Skyview type. The
adjacent luminaire features a white powder
coated spun aluminium bezel and a diamond
faceted vacuum metallised aluminium
reflector housing a dimmable 26W compact
fluorescent lamp. Sensor and control gear
are pre-fitted.
Sizes
350mm diameter unit contains one
downlight, which at full capacity produces
an output of 1800 lumens.
Appearance
White ABS ceiling diffuser ring to
encompass both Sunscoop diffuser and
downlight assembly.
Performance
The sensor which is looking directly
downward continously monitors the light
level reflected back to the ceiling and
regulates the output of the compact
fluorescent lamp to maintain an approximate
pre-determined light level.
Specification clause
Natural daylight and
artificial lighting to …
rooms to be provided by
means of Glidevale
Sunscoop hybrid system
comprising:
Roof-mounted low profile
glazing of 3.0mm clear
uv-stabilised
polycarbonate covered by
10-year warranty against
loss of impact strength,
excessive yellowing and
loss of light transmission.
Roof interface flashing to
be ...
To have AA fire rating to
BS 476: Part 3; 2004.
Tubes and elbows to be
SR98 Mirror with
reflectance 98% and
25-year warranty.
System diameter: 350mm
Circular recessed ceiling
diffuser of diffused
polycarbonate with whitecapped ABS ceiling ring /
Skyview circular diffuser*
incorporating daylight
controlled low energy
compact fluorescent
luminaire, lighting
controller, lux sensor and
PIR presence detector.
Options to be fitted: Light
and sun deflector (LSD),
polycarbonate secondary
glazing skin, lightattenuating damper, fire
protection collar.*
All exposed tubes and
elbows within unheated
voids to be wrapped with
tube insulation. System to
achieve an overall U-value
of 2.2W/m2K.*
Supplier: Glidevale Ltd,
2 Brooklands Road, Sale,
Cheshire M33 3SS,
Telephone: 0161 905 5700
Fax: 0161 905 2085.
Email:info@glidevale.com
*delete as applicable
Note: Since daylighting and room conditions
can change continuously, the lighting level
achieved may vary to some extent from the
pre-set level.
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11
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M
etrodome is an all-aluminium rooflight
range offering ventilation options and
thermal efficiency, with a choice of triple or
double skin polycarbonate glazing. Suitable
for new-build or refurbishment, on both
warm and cold deck flat or low-pitched roofs.
Non-standard sizes can be made to suit
existing roof openings and kerbs. Access
hatches are also available.
Key features
● All-aluminium design incorporating
double skin upstand.
● Thermally enhanced glazing frame
providing a high level of security.
● Driving rain resistant.
● Independently impact tested, may be
deemed non-fragile.
● Standard or humidity-sensitive trickle
ventilation options.
● Available triple or double glazed.
● Rooflights can be manufactured to suit
non-standard roof openings.
Accessories
A range of complementary rooflight
accessories is available, including:
● Metroglazing triple or double skin
polycarbonate domes and pyramids in
clear, diffused or bronze, for fitting
directly to builder’s kerbs.
● Tamper proof security fixings supplied
separately.
● Manual opening operating poles.
● Anti-vandal/security bars available, please
consult Glidevale Technical Services for
further details.
12
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NATURAL DAYLIGHT SOLUTIONS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . METRODOME
. . . . . . . . . . . . . . . . . . .MODULAR
. . . . . . . . . . . . . . ROOFLIGHTS
...........................................
Roof interface
Glidevale rooflights can be supplied for
fitting either directly on the roof deck, or on
a builder’s kerb (usually made on site).
Triple skin
polycarbonate glazing
In new build, an integral upstand is the
favoured choice as it provides a prefinished
internal skin and an exterior to accept the
roof covering. In refurbishment, a builder’s
kerb will often already exist.
Upstand
Metrodome is supplied with an integral
upstand for fitting directly to the roof deck,
or with an additional weathering flange at
the base of the upstand for fitting to a
builder’s kerb. The upstand is manufactured
from double skin mill finish aluminium with
an insulated core, mitred and welded at
corners. The internal face is finished white
for maximum light reflectance.
Aluminium frame
DV4 Delta ventilator
Insulated aluminium
upstand
Metrodome fixed closed, fitted direct to roof
Roof opening size
Triple skin
polycarbonate glazing
Glazing
Triple or double skin polycarbonate with
vented air gap, in extruded mill finish
aluminium frame with mitred and welded
corners. Available in clear, diffused or bronze
glazing in dome or pyramid shapes.
The glazing comes with a 10 year postformed
warranty supported by the polycarbonate
manufacturer against loss of impact
strength, excessive yellowing and loss of
light transmission.
Aluminium frame
ES4 Energy Saver
ventilator
Insulated aluminium
upstand with weathering
flange
Metrodome fixed closed, on builder’s kerb
Roof opening size
Opening
Available either fixed closed, manual opening
or electric opening. Opening options open to
a height of 300mm. For rapid ventilation
areas available see table opposite.
Internal lining to lightwell
Overall kerb size
Metrodome sizes
Manual opening
Electric opening
Note: the finished builder’s kerb should not be
less than 75mm ±5mm in width to provide
adequate fixing for the rooflight upstand.
Roof opening size
(mm x mm)
Daylight
area (m2)
Max. opening
area (m2)
600 x 600
750 x 750
900 x 600
900 x 900
1050 x 750
1050 x 1050
1200 x 900
1200 x 1200
1350 x 750
1350 x 1050
1350 x 1350
1650 x 1200
1650 x 1350
1950 x 1350
0.135
0.270
0.303
0.448
0.426
0.672
0.650
0.941
0.582
0.918
1.524
1.377
1.590
1.926
0.139
0.274
0.251
0.412
0.415
0.499
0.502
0.596
0.506
0.588
0.684
0.732
0.774
0.864
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NATURAL DAYLIGHT SOLUTIONS
. . . . . . . . . . . . . . . . . . . . . . . . . METRODOME
. . . . . . . . . . . . . . . . . . . MODULAR
. . . . . . . . . . . . . . .ROOFLIGHTS
.........................
Thermal insulation
The insulated upstand and double or triple
skin glazing, with vented air gap, give good
thermal insulation and minimise the risk of
condensation.
The overall calculated U-value for a 600 x
600mm unit with triple glazing and upstand
is 1.99W/m2K.
Glidevale Technical Services Department can
provide computer calculations of U-values
for given rooflight sizes in different flat roof
constructions to comply with Building
Regulations Part L 2010. The calculated
U value will vary with the size of rooflight,
due to the changing ratios of upstand,
glazing and frame area.
METRODOME ROOF ACCESS HATCH
Internal and external fire spread (B2/B4)
The internal surfaces of the rooflight
upstand and frame are non combustible and
would achieve a Class 1Y rating when tested
to BS 476: Part 7: 1987.
Polycarbonate glazing a minimum of 3.0mm
thick with a Class 1 rating is deemed by
Building Regulations Approved Document
B4 to be rated AA.
Metrodome rooflights can therefore be used
without restriction on size or spacing in all
types of room and circulation space, except
protected stairways.
Weather resistance
Metrodome rooflights are deluge and driving
rain resistant as demonstrated by test.
Non-fragility
Metrodome rooflights meet the highest level
of impact resistance (1200 joules) to draft
standard BS EN 1873 in BRE tests, and may
be considered non-fragile under the latest
guidelines of HSG33 ‘Health and safety in
roof work’.
Description
Metrodome Roof Hatches provide access to a
roof from inside a building. The construction
is similar to the standard rooflight but the
top opens to 90° and is supported by twin
‘slip and stick’ gas struts. Tops are available
either glazed or insulated aluminium.
An internal latch retains the top when closed
and can be secured with a padlock (not
supplied). These units are not available for
builder’s kerbs.
Size
The access hatch is available in the following
sizes: 900 x 900, 1050 x 1050, 1200 x 900 and
1200 x 1200mm.
Insulated aluminium lid (or may be glazed)
Gas strut
Latch mechanism
14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specification clause
Delete items not required
Rooflights to be Glidevale
Metrodome, manufactured
to BS EN ISO 9001
Supplier: Glidevale Ltd,
2 Brooklands Road, Sale,
Cheshire M33 3SS,
Telephone: 0161 905 5700
Fax: 0161 905 2085.
Email:info@glidevale.com
Sizes: .....
Glazing: double/ triple
skin polycarbonate with
ventilated air gap in
extruded mill finish
aluminium frame with
mitred and welded
corners.
Colour: clear/ diffused/
opal/ bronze.
Shape: dome/ pyramid.
Roof deck upstand:
205mm high with
insulated core, mitred and
welded corners.
Builder’s kerb upstand:
160mm high with
insulated core, mitred and
welded corners.
Opening: fixed closed/
manual opening/ electric
opening to height of
300mm.
Ventilation: ..... DV4 Delta
adjustable ventilators/ ES4
humidity controlled
ventilators fitted to
rooflight upstand.
Internal fire spread rating
Class 1Y, external fire
spread designation AA.
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NATURAL DAYLIGHT SOLUTIONS
METROGLAZING
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G
lidevale Metroglazing units are available
for fixing directly to a builder’s kerb
where replacement glazing or upgrading of
appearance or thermal performance is
required.
They are available in a range of standard
sizes with double or triple skin
polycarbonate glazing in Clear, Diffused or
Bronze with either Dome or Pyramid shapes.
Tamper resistant glazing fixings, are
supplied - see table below.
Glazing fixings
Overall
kerb size
475 x 475
625 x 625
775 x 475
775 x 775
925 x 625
925 x 925
1075 x 775
1075 x 1075
1225 x 625
1225 x 925
1225 x 1225
1525 x 1075
1525 x 1225
1525 x 1525
1825 x 1225
Number of fixings
per unit
8
8
10
12
10
12
14
16
12
14
16
18
18
20
20
SITEWORK
Handling and storage
To reduce the risk of damage, all Metro
rooflights are delivered to site shrinkwrapped in polythene with additional corner
and glazing protection. All rooflights must
be handled with care, particularly when
hoisting them onto the roof. Store out of
direct sunlight on a dry area, on edge, with
separating pieces between. Never stack
rooflights on top of each other.
Maintenance
Maintenance is not normally required
beyond occasional cleaning of glazing. Use
mild non-alkaline detergent and plenty of
water; take care to minimise surface
scratching which is inevitable with all
plastics.
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15
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NATURAL DAYLIGHT SOLUTIONS
. . . . . . . . . . . . . . . . .FURTHER
. . . . . . . . . . . . . .INFORMATION
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References
Building Regulations 2000
Approved Document B (Fire Safety) Volume 2
-Buildings other than dwellinghouses (2006
edition): B2 Internal fire spread (linings), B3
Internal fire spread (structure), B4 External
fire spread.
Approved Document F Ventilation (2006
edition).
Approved Document L2A 2006 Conservation
of fuel and power (New buildings other than
dwellings) (2006 edition).
Approved Document L2B 2006 Conservation
of fuel and power (Existing buildings other
than dwellings) (2006 edition).
BS 5250: 2011 Code of practice for the
control of condensation in buildings.
BS 5720: 1979 Code of practice for
mechanical ventilation and air conditioning.
BS 6229: 1982 Code of practice for flat roofs
with continuously supported roof coverings.
BS 8206 Lighting for buildings: Part 2: 1992
Code of practice for daylighting.
Quality Assurance
The Glidevale Sunscoop system has been
designed, developed and manufactured
under a BS EN ISO 9001 Quality
Management System. Independent auditing
provides the user with assurance that the
products will fulfil their intended purpose.
Operational commitment
As part of our commitment to minimising
our impact on the environment, and to
continuous improvement in our methods of
operation, Glidevale is accredited to
ISO 14001 Environmental Management,
OHSAS 18001 Health and Safety
Management, and ISO 9001 Quality
Management Systems.
Services
For further information and advice on the
selection and design of Sunscoop tubular
and Metro modular rooflight installations
please consult Glidevale Technical Services.
Other products
Glidevale market a wide range of other
building products including roof ventilation
and roofing accessories, underfloor and
cavity wall vents, Protect underlays and
membranes, and loft access traps.
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GLIDEVALE LIMITED
2 Brooklands Road, Sale, Cheshire M33 3SS Tel: 0161-905 5700 Fax: 0161-905 2085
Email: info@glidevale.com Web: www.glidevale.com
Glidevale Limited maintains a policy of continuous development and reserves the
right to amend product specifications without notice.
A member of the Building Product Design Group
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Produced by Ted Hastings/Rackley Design 4464
GB Glidevale Sunscoop tubular and
Metro modular rooflights are made in
Great Britain.