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

UltraLight Dual Monopitch Rooflight With Hipped Ends

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

PRISM Glass Pyramid

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

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

Klarity. Small Glass Floor

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

Victoriana Conservation Style Roof Window.(Installed)

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

Mercuri Standard Drawing MA 20-01-09A. Klarity Walk On Glass Rooflight (External Use)
Mercuri Standard Drawing MA 20-01-10. Victoriana Conservation Style Roof Window. (Ventilated)
Mercuri Standard Drawing MA 20-01-08. PRISM Typical Installation Details.
Mercuri Standard Drawing MA 20-01-07. TopLight Vista. Typical Installation Details.

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

Mercuri Standard Drawing MA 20-01-03. UltraLIght Ventilated RidgeLight.
Mercuri Standard Drawing MA 20-01-09B. Klarity Walk On Glass Rooflight (Internal Use)
TopLite Vista Triangular Rooflight