Dalite Rooflights
Dalite Rooflights
Creating better quality environments
with natural light
Promotes Health Benefits
Reduces Energy Costs
Reduces Carbon Footprint
Contemporary Styling
Compliant with Current Building and Safety Regulations
Dalite Rooflights
Natural light can dramatically improve the quality of life
Incorporating rooflights into a flat roof can provide three times
for anyone living or working within a building – boosting
more daylight than the same area of vertical windows and
concentration, feelings of well being and productivity.
provide a much more even distribution of light.
Dalite Rooflights are an ideal way to maximise the transmission
of high quality, uniform, natural day light through a flat roof into
the interior- with all the benefits that daylight can deliver.
2
Research shows that rooflights equating
to 15 - 20% of the roof area will positively
contribute to an overall reduction in CO2
emissions. (Ref - NARM - Designing with rooflights)
Dalite Rooflights
The Natural Choice
Dalite Rooflights are specifically designed to meet the growing
Environmental, Thermal and Structural demands of today’s
Building sector.
• Reduces Energy Costs – It is conclusively proven that rooflights
can save energy in many applications through the reduction in
Thermal Performance – Dalite Rooflights deliver
exceptional insulation values through innovative
kerb design and cassette glazing system. All triple
& quad skin Dalite Rooflights exceed Building
Regulations Part L requirements.
the requirement for artificial light and lower heating cost due
to natural solar gain.
• Code Credits – Rooflights can achieve up to 3 credits within
section 7.0.1 Daylighting of the Code for Sustainable Homes.
•
Reduces Carbon Footprint – Research has shown that
typically the total CO2 emissions associated with all aspects of
• Acoustic Performance – All rooflights must satisfy demanding
operating a building without rooflights can be over 50% higher
acoustic performance requirements, additionally the Dalite
than for a building with 12% rooflights.
Acoustic Pack can be integrated with fixed unvented domes to
further reduce noise from rain or other external sources. The
• Promotes Health & Wellbeing – Lack of natural daylight can
lead to lethargy or in serious cases seasonal affective disorder.
Dalite Acoustic Pack can earn BREEAM credits and reduces
noise by circa 65% (15db).
Rooflights bring more natural light into the building resulting
in an improved overall environment leading to a feeling of
• Contemporary Design – The sleek lines and low rise
wellbeing for occupants. Hospital studies have shown that
dome design provide the ultimate in rooflight aesthetics
recovery rate of patients is accelerated where levels of natural
including powder coated frame colour options and glass or
light are increased.
polycarbonate glazing.
• Promotes improved productivity – Natural Daylight improves
• Best Value – The Icopal Dalite Range is designed to suit all
concentration so that working environments, offices or
budgetary requirements and is delivered to the project as a
factories, with daylight tend to achieve better productivity.
factory assembled unit ready to install.
In education, research shows a positive correlation between
classrooms with good natural light and improved student
performance - and attendance.
Building Regulations Part L acknowledges the effectiveness of rooflights as a
way to increase the amount of natural daylight entering a building.
3
Dalite Premium
The architecturally inspired Dalite Premium delivers maximum security and high insulation in a sleek, stylish design package.
Tamper proof fixings are concealed beneath a modern aluminium security frame, and a secret lock system allows domes to be
installed and locked securely into place providing the highest possible security level.
• The contemporary low rise dome design is complemented by a stylish aluminium frame which is available in a silver anodised finish
or powder coated to any standard RAL colour.
• Fixings are concealed for maximum security and complete peace of mind .
• The secret lock system locks the dome into place and can only be removed with the Dalite security key.
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Dalite Rooflights
1
Alumium Security Frame
• Protects and conceals tamper proof fixings
for added security.
• Stylish anodised silver finish.
• Powder coated option to standard RAL
colours.
2
1
2
Glazing
• Contemporary low rise polycarbonate glazing
profile.
3
6
• Dual sided UV protection.
• 200 times stronger than glass.
• Triple and quad skin glazing meets and
exceeds Part L.
4
• Options for controlling heat gain and solar
5
glare.
• Glass inner glazing option for improved U
values, acoustics and aesthetics.
• 25mm structured polycarbonate inner glazing
option for improved thermal performance.
3
Glazing Cassette
• Maintains spacing between glazing
Note:
• Reduces risk of condensation.
Dalite rooflights can also be fixed directly
to builders upstands.
4
See page 8 for more options
Secret Security Clips
• Concealed and locked in place for high
security.
2
• Special key required to unlock.
1
5
Multiwall PVC Kerb
• High Thermal efficiency
3
• Robust and durable.
4
150 mm to
216 mm overall
6
5
membrane
height of kerb
• Sloped foot allows roof covering to be finished
without need for timber fillets.
• Conceals powered opening components for
clamp.
an uninterrupted lightwell.
• Option to include trickle ventilation.
7
6
Membrane Clamp
• Secure termination detail for the waterproofing membrane.
7
Cross section through Dalite Premium Rooflight
Insulated Kerb Support
• Option to raise the height of rooflight upstand
to match the roof insulation thickness. (see
page 15 for further details)
5
Dalite Standard
The high quality Dalite Standard unit is adaptable for virtually any application. It has a low sleek glazing
profile, available as a dome or pyramid, and has outstanding aesthetics.
• Thermally efficient robust multiwall PVC kerb with integral membrane clamp
• Secure fixings with tamper proof caps.
• Low profile dome providing superior aesthetics.
• Multiple glazing options to meet and exceed the thermal requirements of Part L.
6
Dalite Rooflights
Security Fixings
1
• Tamper proof fixing caps.
2
Glazing
• Contemporary low rise polycarbonate
2
1
glazing profile.
• Dual sided UV protection.
• 200 times stronger than glass.
• Triple and quad skin glazing meets and
3
exceeds Part L.
• Options for controlling heat gain and solar
5
glare.
6
• Glass inner glazing option for improved U
4
values, acoustics and aesthetics.
• 25mm structured polycarbonate inner
glazing option for improved thermal
performance.
3
Glazing Cassette
• Maintains spacing between glazing
• Reduces risk of condensation.
4
Note:
Multiwall PVC Kerb
• High Thermal efficiency
Dalite Rooflight can also be fixed directly
• Robust and durable.
to builders upstands.
• Sloped foot allows roof covering to be
See page 8 for more options
finished without need for timber fillets.
• Conceals powered opening components for
an uninterrupted lightwell.
2
1
5
3
6
waterproofing membrane.
8
5
150 mm
To membrane
216 mm
4
clamp
Membrane Clamp
• Secure termination detail for the
overall height
6
Gasket Seal
7
Insulated Kerb Support
of Kerb
• Option to raise the height of rooflight upstand
to match the roof insulation thickness. (see
page 15 for further details)
7
8
Trickle Vent
• Provides background ventilation (optional).
Cross section through Dalite Standard Rooflight
7
Alternative fixing options for
Dalite Rooflights
It is possible to fix both Dalite Premium and Dalite Standard ranges of rooflights directly to new or existing builders upstands using a
Dalite Direct Fix (DF) adapter. The flexibility of the DF adapter allows fixed, ventilated and opening rooflight options.
• Direct Fix Adapter (DF)
DF Adapter - Fixed
DF Adapter - Trickle Ventilated
DF Adapter - Hinged for Opening
Dalite Premium with Trickle Ventilation
Dalite Premium - Opening
Dalite Standard with Trickle Ventilation
Dalite Standard - Opening
Fixing Examples
• Dalite Premium fixed to Builders Upstand
Dalite Premium – Fixed
• Dalite Standard fixed to Builders Upstand
Dalite Standard – Fixed
(DF Adapter optional)
8
Dalite Rooflights
Dalite Extension Frame (EF)
Where roof openings are a non standard size, a Dalite Extension Frame (EF) can be used to allow Dalite Premium or Dalite Standard
Rooflights to be fitted.
The overall width of the existing builders upstand is increased allowing the next larger size Dalite Rooflight to be fitted therefore
maintaining the maximum possible daylight through the aperture.
The Dalite Extension Frame can also be used in conjunction with the Direct Fix Adapter to create very flexible solutions for most
existing site conditions.
Fixing Examples
• Dalite Premium using Dalite Extension Frame
Dalite Premium – Fixed
Dalite Premium – Ventilated
Dalite Premium - Opening
Fixing Examples
• Dalite Standard using Dalite Extension Frame
Dalite Standard – Fixed
Dalite Standard – Ventilated
Dalite Standard - Opening
(Note: does not need DF adapter)
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Dalite Dome
Dalite Dome is a glazing only unit designed specifically for
refurbishment projects where the glazing only needs to
be replaced. The unit is supplied with a fixing kit including
weathertight washers and tamper proof security fixings.
Dalite Domes are manufactured from longlife polycarbonate,
this glazing unit is up to 200 times stronger than glass. It’s high
resistance to breakage and adverse weather conditions means
the Dalite Dome is very safe and reliable.
• Dome, pyramid and circular options available.
• Single, double and triple skin Domes available.
• Available with standard 70mm or 100mm wide flange options.
• Can be used in conjunction with Dalite Extension Frame (EF).
Dalite Dome fixed directly to builders
Dalite Dome fixed directly to builders
upstand
upstand using a Dalite Extension
Frame (EF).
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Dalite Rooflights
Dalite Circular
Dalite Circular is specified for it’s distinct styling and character.
It features a strong and robust GRP kerb.
• Robust insulated GRP kerb.
•
Tamper proof security caps encase fixings for additional
security.
• Double and triple skin units available.
Dalite Access Hatches
The Dalite range of access hatches are available in both the
Premium and Standard models. They are lockable from the inside
and can be easily opened through 90 degrees using integral gas
rams.
The access hatches, which are available in a number of different
sizes (see page 14), can be configured to match the specification
of the project. They should be used in conjunction with a suitable
access ladder (not supplied).
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New Dalite Configuration
Size and Shape
Available in bespoke and standard sizes from 600x600mm up to 1800x1800mm with a choice of low rise dome or low rise pyramid
shaped glazing units (See page 14).
Low Rise Dome
Low Rise Pyramid
Circular
Glazing
Glazed longlife polycarbonate and available in double, triple and quad skin units depending on the level of thermal insulation requirement.
Double skin
Triple skin
Clear glazing provides high visibility
Textured glazing provides privacy
Light Transmittance:
Light Transmittance:
Double
Triple
Quad
Double
Triple
Quad
85%
78%
72%
78%
72%
66%
Quad skin
* Single skin &
double glazed
glass
**Single skin
and structured
Polycarbonate
Additional glazing options include:
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Bronze glazing provides solar control
Opal glazing provides privacy, diffused
light & solar control
Light Transmittance:
Light Transmittance:
• * Double glazed glass inner glazing (argon filled)
for improved Ud-values, acoustics and aesthetics.
Double
Triple
Quad
Double
Triple
Quad
39%
36%
33%
35%
32%
30%
•** 25mm structured polycarbonate inner glazing for improved thermal performance.
Dalite Rooflights
Openings and ventilation
options
Opening Options
• Manual opening with winding pole
• Powered opening
• Powered opening with RF remote control handset
• Powered opening with RF remote control handset and rain sensor
• Access Hatch – Lockable from the inside, with gas strut assisted
opening.
Opening Type
Description
Opening Limits
Manual Opening
Hinged opening dome which is operated manually via
Opens to 300mm
a worm gear drive with a winding pole.
Powered Opening
Powered opening with rain sensor
Access Hatch
Powered hinged opening dome which is opened and
Opens to either 240mm or 300mm depending on
closed using a control switch or remote control.
rooflight size.
Powered hinged opening dome which includes rain
Opens to either 240mm or 300mm depending on
sensors for automatic operation.
rooflight size.
To gain entry to a roof for maintenance or as an
90° opening
emergency exit. Unit held open by two gas struts.
Ventilation
Airflow through trickle ventilation
Manual or automatically operated ventilation methods are available to provide air
circulation to the building to meet the required background ventilation standards
as set out in Part F of the Building Regulations.
Ventilation Type
Description
Opening Limits
Trickle Ventilation -
Manually operated trickle venti-
Provides 8400 mm²
(Hit and Miss) Louvre Type -
lation provides background
Equivalent Area ventilation
available on premium only
ventilation to the interior.
Automatic Humidity Controlled
Humidity controlled trickle
Provides 7822 mm²
Trickle Vent
ventilation is controlled to open
Equivalent Area ventilation and
and close in response to room
provides superior protection
humidity levels, without need
against condensation
Airflow
for electrical connection.
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Size and Configuration
For Premium and Standard rooflight range
Premium and Standard Options
Standard
dome size (D) mm
Shape
Trickle Vents
(manual)
Ventilation
Automatic
(Humidity Controlled)
Ventilation
Manual
Opening
Powered
Opening
R/C Powered
Opening
R/C Powered
Opening with
Rain Sensor
600x600
D,P
●
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●
600x900
D,P
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●
600x1500
D,P
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750x750
D,P
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750x900
D,P
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900x900
D,P
●
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900x1800
D
●
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●
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1050x1050
D,P
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1050x1500
D,P
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1200x600
D,P
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Access Hatch
1200x900
D,P
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1200x1200
D,P
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1200x1500
D,P
●
●
●
●
●
●
●
●
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1200x1800
D
●
●
1200x2400
D
●
●
1350x1350
D,P
●
●
1500x1500
D,P
●
●
1800x1800
D
●
●
D: Dome P: Pyramid - Bespoke sizes available upon request.
For Dome rooflight range
For Circular rooflight range
Dome Optioins
Circular Options
Standard
dome size (D) mm
Standard Shape
Standard Sizes mm
Standard Shape
Standard
dome size (D) mm diameter
Standard Shape
600 x 600
D,P,C
1200 x 600
D,P
600
C
600 x 900
D,P
1200 x 900
D,P
750
C
600 x 1500
D,P
1200 x 1200
D,P,C
900
C
750 x 750
D,P,C
1200 x 1500
D,P
1050
C
750 x 900
D,P
1200 x 1800
D
1200
C
900 x 900
D,P,C
1200 x 2400
D
1350
C
900 x 1800
D
1350 x 1350
D,P,C
1500
C
1050 x 1050
D,P,C
1500 x 1500
D,P,C
1800
C
1050 x 1500
D,P
1800 x 1800
D,C
C: Circular
D: Dome P: Pyramid C: Circular.
Dalite Dome & Kerb dimensions
D
D
R Roof opening size
B Width of builders
upstand
R=D
D Dome size
Contact Icopal Technical Dept
for advice on correct dome
sizing.
14
B
R
R
Dalite Rooflights
Dalite Accessories
Acoustics Pack
Where acoustics are particulary important, for example the need
to reduce rain penetration noise in a school classroom, an acousAcoustic
liners
tics pack is available. This reduces noise levels by over 15dB and
consists of an acoustic liner up the inside face of the upstand plus
a heavyweight liner beneath the kerb. This means it can only be
used with unvented and non opening rooflights.
Dalite Security Grilles
Security grilles are manufactured from a robust steel angle frame
and fully welded steel bar grid.
They can be incorporated into most rooflights applications and
are securely fixed between the rooflight and roof structure to provide a secondary line of security.
Security grille fitted to Dalite
Security grille fitted to builders
Kerb.
upstand.
Insulated Kerb Support
The Insulated Kerb Support eliminates the possibility of a cold
bridge and provides a structural connection for the rooflight kerb
foot ensuring that the waterproofing upstand is always maintained at 150 mm above the finished roof surface in line with the
code of practice.
Available in 90, 100, 120 and 140 mm as standard, other sizes can
be supplied to order.
The Kerb Support height should generally match the thickness of
the roof insulation.
Winding Poles
For opening and closing of manual hinged rooflights available in 2
and 3 metre lengths.
15
Performance and Technical
Compliance
Sustainability and the Environment
Warranty
Icopal strive to reduce consumption of energy and raw
Dalite rooflights are guaranteed fit for purpose in normal
materials, and recycle as much as possible. Icopal have attained
industrial conditions for a period of 20 years. They will not
the environmental standard ISO 14001.
become perforated, or loose significant structural strength, or
distort to the extent of losing weathertightness.
Product Testing
The polycarbonate carries a manufacturer’s warranty, which
Icopal is committed to produce quality products that meet
guarantees that for the first 10 years of the main guarantee
the needs of our customers, which is recognised from our ISO
period a cleaned sample of rooflight shall:
9001 standard. As well as complying with stringent quality
- not show an increase in yellowness index of more than 10
procedures, the Icopal Dalite range of rooflights are tested to
Delta compared with the original value when tested in
recognised industry standards. These tests will be specific to
accordance with the method described in ASTM D1925 (1977)
each product, but may include a selection of the following:
- not show a loss of light transmission of more than 10% when
compared to its original value when tested in accordance with
Non-Fragility
The Dalite range of rooflights are tested in accordance with
ACR[M]001:2005, and achieve a Class B non-fragility rating.
the method described in ASTM D1003 (1977).
- achieve an impact resistance of at least 27Nm when impact
tested using a falling dart impact test.
This demonstrates a safe and robust product tolerant to
impact damage. A non-fragility rating is required by the HSE
Please ask Icopal Technical Department for full warranty details.
(Health and Safety Executive), in order to comply with CDM
(Construction (Design and Management)) Regulations.
Certification
The Icopal Dalite range has full BBA approval. For further
Fire Rating
Icopal Dalite rooflights are compliant with UK Building
Regulations in relation to fire rating. Icopal use polycarbonate
glazing in the Dalite range which achieves Class B, s1, d0, thus
exceeding the newer European requirement in all aspects.
Weathertightness
The Dalite range is designed to meet exacting standards for
weather performance and comply with the requirements of BS
EN 1873:2005.
Ventilation
The trickle (hit and miss) ventilation system used as an option
in the Dalite range meet the requirements outlined in BS EN
13141 Part 1 2004 for air flow, air leakage and weathertightness.
Options for both background and purge ventilation can help to
meet the requirements of Part F as set out in the UK Building
Regulations.
16
information, please contact Icopal’s Technical Department.
Dalite Rooflights
Thermal Performance
W/m²K. Therefore Icopal recommend units which are at least
The Dalite range can be specified to exceed the thermal
triple skin glazed to achieve this value.
performance required by Part L of the Building Regulations.
This will provide a more thermally efficient building, therefore
Triple skin polycarbonate units achieve a centre pane U-value¹
lowering carbon emissions, and running costs. It will also create
of 1.8 W/m²K and a Ud-value², which ranges from 1.25W/m²K
a positive contribution to BREEAM ratings, especially when
for a 600x600mm dome to 1.51W/m²K for a 1200x2400mm
combined with artificial lighting controls.
dome.
Higher performance glazing options can further reduce the
In order to meet Part L 2A of the Building Regulations, the
Ud-value to as low as 0.95W/m²K contributing to a more energy
rooflight unit will be usually required to have a U-Value of 2.2
efficient building and BREEAM credits.
Centre Pane
Centre Pane
U-Value¹ (W/m²K)
U-Value¹ (W/m²K)
Ud-Value² (W/m²K)
600x600mm
1200x2400mm
Double Skin Polycarbonate
2.7
1.54
2.09
Triple Skin Polycarbonate
1.8
1.25
1.51
Quad Skin Polycarbonate
1.4
1.12
1.25
Structured Polycarbonate
1.2
1.06
1.13
Standard Glass Inner Glazing
1.21
1.06
1.13
Argon filled Glass
0.9
0.96
Inner Glazing
Inner Glazing
1
Centre Pane U-value is a measure of thermal efficiency of the glazing type.
2
Ud-Value is thermal efficiency of the developed rooflight unit.
Design Considerations
pproved Document L 1B - Existing dwellings
2. A
Icopal can offer support and advice to ensure that the correct
This section, which relates to existing dwellings, sets the
Dalite rooflight is specified for the right application. The
maximum U-Value at 1.6 W/m2K for a complete rooflight unit.
following points should be considered, but please contact
It recommends that the rooflights are draft-proofed units.
Icopal’s Technical Department for further assistance.
Approved Document L 2A – New buildings other than
3. Building Regulations Approved Document L 2010 –
dwellings
Conservation of Fuel and Power
This document sets out a minimum energy performance
This approved document is designed to provide practical
requirement for new dwellings. It looks at CO2 emissions as a
guidance on ways of complying with the energy efficiency
measure of energy performance against a standard. It sets a
requirements of the Building Regulations. These regulations
maximum U-Value of 2.2 W/m2K for a complete rooflight unit.
are split in to 4 sections:
4. Approved Document L 2B – Existing buildings other than
1. Approved Document L 1A - New dwellings
dwellings
This document sets out a minimum energy performance
Part L2B sets a U-Value requirement of 1.8 W/m2K as defined
requirement for new dwellings. It looks at CO2 emissions as a
in the vertical plane (which equates to 2.1 W/m2K in the
measure of energy performance against a standard. It sets a
horizontal plane).
maximum U-Value of 2.0 W/m2K for a complete rooflight unit.
17
Solar Gain
buildings, also highlighting schools. Icopal provide an acoustic
Solar heat gain within a building can occur when the sun heats
pack within the Dalite range where particular acoustic
the building up during the day. Solar gains are beneficial in winter
performance is required.
as a means of offsetting heat demand, but can contribute to
overheating in the summer months. To lessen this effect, solar
Ventilation
controlled glazing can be used to reflect solar radiation. This in
As outlined in Approved Document F1 of the Building
turn reduces the need for air conditioning to cool the building,
Regulations (Means of Ventilation), there should be adequate
thus reducing CO2 emissions. Approved documents L 1A and L
means of ventilation for people within the building. Ventilation
2A outline the requirements to limit solar gain.
through rooflights provides a useful way of complying with the
regulations, especially when other means of ventilation can be
Optimum rooflight Area
limited.
As outlined above, rooflights make a positive contribution to
reducing CO2 emissions. Research has shown that typically the
Upstands
total CO2 emissions associated with all aspects of operating
BS 6229: 1982, Code of Practice for flat roofs with continuously
a building without rooflights can be over 50% higher than for
supported coverings, outlines that the waterproofing upstand
a building with 12% rooflights. The optimum area of rooflights
detail should terminate at least 150mm above the uppermost
will vary for each building. However, research has shown that
roof surface to which the roof covering is bonded or dressed.
a rooflight area of 15-20% of the roof area, will contribute to an
overall reduction in CO2 emissions in most buildings.
Condensation
Condensation is created due to environmental conditions
Fire Safety
when warm moist air comes into contact with a cooler surface.
This is covered by Building Regulations Approved Document B
However as temperature and humidity levels within a room
2006. Volume 1 relates to dwelling houses and Volume 2 relates
below a rooflight are beyond our control, then no guarantees
to buildings other than dwelling houses. The requirements are
can be given against the formation of condensation. Higher
outlined as either “national classifications” (based on BS 476
levels of insulation inherently built into the Dalite range of
standards) or “European classifications” (based on BS EN 13501
rooflights, and the cassette glazing system, minimises the risk
Part 1: 2002). Whilst the tests are different and therefore not
of condensation.
exactly equivalent, products can meet either requirement.
Limitations on use
18
Air Tightness
The Icopal Dalite range of rooflights are designed to be used on
Air tightness relates to a buildings air leakage rate, when
standard flat Icopal membrane roofs on a pitch no greater than
pressure tested. Therefore the building should meet the
10°, and in situations where excessive wind loads, or extreme
relevant value as measured against a standard. Guidance is
climatic conditions cannot arise. Please contact Icopal’s
given within the Building Regulations Approved Document L
Technical Department for a copy of the Warranty and Terms
2010 (Parts L1A, L2A and L2B)
and Conditions for further assistance.
Resistance to the Passage of Sound
Health and Safety
This is outlined in Approved Document E of the Building
Under the Construction (Design & Management) Regulations
Regulations (Resistance to the Passage of Sound). It sets
– CDM, it is the responsibility of the employer to ensure that
guidance for resistance to sound transmission relating to
any employee required to work at height must be suitably
Dalite Rooflights
protected from any potential fall hazards. In the event of a fall
Technical Support
the equipment used must be of sufficient strength to arrest a
Icopal’s extensive National Sales and Specification team is
worker’s fall.
available throughout the UK and Ireland to offer technical advice,
specifications, site surveys and support for any enquiry you
The Work at Height Regulations 2005, state that there is a
have. This is backed up by Icopal’s expert Technical Department,
duty placed on employers, the self employed and anyone who
which is able to provide technical drawings and specific detailing
controls the work of others at height to provide a safe method
assistance to complete a fully integrated service.
of work.
Therefore it is important that when installing or maintaining
rooflights, there is adequate protection for the operative
against falling. Icopal can supply advice and integrated roof
safety systems which will assist in these processes. Please
contact Icopal’s Technical Department for further information.
19
Icopal Ltd
Barton Dock Road
Stretford
Manchester
United Kingdom
M32 0YL
Tel: +44 (0) 161 865 4444
Fax: +44 (0) 161 864 2616
[email protected]
www.icopal.co.uk