Rooflights ● Glazed Canopies ● Architectural Glazing
Tel: 01253 827633
Technical Information
(Glass Rooflights)
KEY PERFORMANCE DATA
ACOUSTIC REDUCTION: Double Glazed Glass * Sound reduction (Rw) of c. 31 dB
FIRE RATING: As standard, TopLite VISTA rooflights are not fire rated as they
usually incorporate laminated glass, which unlike most other glass
does not carry a Class 0 fire rating; Class 0 is the highest rating
currently available and is awarded to materials that are
non-combustible.
However, it should also be noted that laminated glass is widely and
safely used in rooflights and overhead glazing systems and is
frequently the preferred glass specification, especially when installed
as a low-e glass.
LIGHT TRANSMISSION: A wide variety of specialist glass is available, each with different
capabilities and levels of technical performance. A frequently
specified double glazing combination incorporating low-e glass
(thermally insulated glass) has a light transmission value of 78%
SOLAR FACTOR: (G Values) Clear Double Glazed Glass * c. 0.59
THERMAL PERFORMANCE: (U Values.) Double Glazed Glass * 1.4 W/m²K
(Total Rooflight) Triple Glazed 1.2 W/m²K
WEIGHT (Glazing): Double Glazed * 30 kg/m²
INSTALLATION: These rooflights are designed to be installed on a 'flat' roof at a minimum pitch
of 5°. However, if self-cleaning glass is specified, this must be increased to 15°
* 6.0mm toughened clear Outer / 16mm Argon-Filled Cavity / 6.4mm low-e laminated clear Inner
TopLite Vista
Aluminium or uPVC Thermally Efficient Framed,
Double or Triple Glazed Glass Rooflights.
Supplied complete with a uPVC upstand
or Designed To Be Installed Onto A Builder’s Kerb.
Glazed with Dirt Resistant, Solar Controlled
and Low E Laminated Glass.
(Glass Thickness to Suit Roof Opening Size)
Designed and manufactured to meet
BS 6375-1: Weather tightness.
BS EN 1026: Air permeability.
BS EN 1027: Water tightness test.
BS EN 12211: Wind resistance test.
Also designed to comply with Approved Document L
and to achieve excellent U values
UltraLight and UltraLight Max
Thermally Broken Aluminium
Glass Glazing Systems
Can be supplied with various specifications of
Technical or High Performance Glass
UltraLight... Design compliance includes BS 5399 Pt 2
1995, BS 5516 1991, BS 6399 Pt 1 1972,
Pt 2 1995, and Pt 3 1988
Complies with Part L of the Building Regulations
and CP3 Chapter V Pt 2 1972
UltraLight Max... Designed and engineered to the
highest national and international standards including
NEN-EN 1990, NEN-EN 1991 1-1, 1-3 and 1-4
KEY PERFORMANCE DATA
ACOUSTIC REDUCTION: Double Glazed Glass * Sound reduction of (Rw) c. 31 dB
FIRE RATING: In general glass is non combustible and therefore achieves a Class 0
classification, which is the highest possible.
However, due to the interlay material used in its manufacture, this
classification currently does not apply to laminated glass, although
laminated glass is for many, including ourselves, the preferred glass
option for overhead glazing.
Please note that once it has been fully encapsulated by glass, the
interlay material (which is a key component of laminated glass)
is extremely hard to ignite.
LIGHT TRANSMISSION: A wide variety of specialist glass is available, each with different
capabilities and levels of technical performance. A frequently
specified double glazing combination incorporating low-e glass
(thermally insulated glass) has a light transmission value of 78%
SOLAR FACTOR: (G Values) Clear Double Glazed Glass* c. 0.59
THERMAL PERFORMANCE: (U Values.) Double Glazed Glass * 1.1 W/m²K
(Centre Pane)
WEIGHT (Glazing): Double Glazed Glass * 30 kg/m²
INSTALLATION: It is recommended that these glazing systems are installed at a minimum
pitch of 5° (or 15° if self cleaning glass is to be specified), up to a maximum
of 90°.
* 6.0mm toughened clear Outer /16mm Argon-Filled Cavity / 6.4mm clear low-e laminated Inner
KEY PERFORMANCE DATA
ACOUSTIC REDUCTION: Double Glazed * Sound reduction (Rw) of c. 36 dB
Triple Glazed Sound reduction (Rw) of c. 38 dB
FIRE RATING: PRISM rooflights, in common with most rooflights and roof glazing
systems are not fire rated. However, because it is regarded as a
non-combustible material, glass is usually awarded a Class 0 fire
rating, which is the highest (safest) that is currently available.
LIGHT TRANSMISSION: Double Glazed 71%
Triple Glazed 65%
SOLAR FACTOR: (G Values) Double Glazed * 0.51
Triple Glazed 0.47
THERMAL PERFORMANCE: (U Values.) Double Glazed * 1.6 W/m²K
(Total Rooflight) Triple Glazed 1.0 W/m²K
WEIGHT (Glazing): Double Glazed * 30 kg/m²
Triple Glazed 35 kg/m²
INSTALLATION: These rooflights are designed to be installed on a ‘flat' roof at a minimum pitch
of 5°, or into pitched roofs no greater than 70°
Please note that the specific glass used will depend on the style and size of
the rooflight required.
* 6.0mm solar control, self-cleaning, toughened clear Outer / 18mm Argon-Filled Cavity /
6.0mm toughened Inner
PRISM
Minimal, Thermally Broken 'Flushline' Glass Rooflights
Double or Triple Glazed with
Self-Cleaning, Solar Control Glass
PRISM is designed and tested to the
highest standards Including
BS 6375-1. 2015, BS 1026 2000, BS 1027 2000
Complies with the latest Building Regulations
Klarity
Thermally Broken, Walk On Glass Rooflights
and Fire Rated Glass Floors
Glazed (as a minimum) with 33mm Laminated Glass
For complete peace of mind, the actual glass
specification will be calculated to suit the size of
Rooflight or Glass Floor required
KEY PERFORMANCE DATA
ACOUSTIC REDUCTION: 33mm Toughened and Laminated Glass. Sound reduction (Rw) of c. 44 dB
Please note that the minimum thickness of direct load bearing glass used for Klarity
Walk On Rooflights is 33mm (Laminated Glass).
FIRE RATING: Fire Rated Klarity Floors and Rooflights achieve more than 90 minutes
of Integrity, Insulation and Load Bearing.
In addition we also offer Klarity rooflights that have 0 minutes
of Fire Resistance.
LIGHT TRANSMISSION: 33mm Toughened and Laminated Glass 81%
SOLAR FACTOR: (G Values) 33mm Toughened and Laminated Glass 0.63
THERMAL PERFORMANCE: (U Values.) 33mm Toughened and Laminated Glass 1.0 W/m²K
(Centre Pane)
WEIGHT (Glazing): 33mm Toughened and Laminated Glass 90 kg/m²
INSTALLATION: These rooflights are designed to be installed onto a 'flat' roof or alternatively,
into a floor with a maximum pitch of 1°
N.B. Please note that the specific glass and design details we will suggest
shall depend on the style and size of the rooflight or glazed floor required.
* 33mm Toughened and Laminated Glass Outer / Argon-Filled Cavity / 6.4mm Laminated low-e Inner
KEY PERFORMANCE DATA
ACOUSTIC REDUCTION: Double Glazed * Sound reduction (Rw) of c. 31 dB
Triple Glazed Sound reduction (Rw) of c. 32 dB
FIRE RATING: Victoriana rooflights, in common with most rooflights and
roof glazing systems are not fire rated. However,
non-laminated glass is usually rated as being Class 0.
As standard, Victoriana rooflights are not glazed with
laminated glass, although this extra safeguard is available
on request.
LIGHT TRANSMISSION: Double Glazed * 40%
Triple Glazed 32%
SOLAR FACTOR: (G Values) Double Glazed * 0.32
Triple Glazed 0.25
THERMAL PERFORMANCE: (U Values.) Double Glazed * 1.0 W/m²K
(Centre Pane) Triple Glazed 0.5 W/m²K
WEIGHT (Glazing): Double Glazed * 20 kg/m²
Triple Glazed 30 kg/m²
INSTALLATION: These rooflights are designed to be installed in a sloping roof with
the degree of pitch no less than 17° and a maximum of 70°
* 4mm BioClean self-clean, solar control, toughened Outer / 16mm Argon-Filled Cavity /
4mm clear toughened Inner
Victoriana
Custom Sized, Steel Framed,
Conservation Styled Glass Rooflights
Glazed (as a minimum) with
4mm toughened BioClean Natura
16mm black warm edge spacer
4mm toughened Planitherm OneGlass
Designed and Manufactured To The Most Demanding Of Standards Including BS EN ISO 10077-1:2017 and
BS EN 14351–1:2006 + A1:2010
