Home > Companies > VELUX Company Ltd > GPU manually operated, white polyurethane, top-hung roof window, twin installation

Manually operated, maintenance free, white polyurethane, top hung roof windows for twin installation with 18 mm or 50 mm gap on roof pitches between 15–55° (75°).

Features:

  • Can be installed in roof pitches 15–55° and up to 75° with special springs.
  • Maintenance free polyurethane moulding with white finish on timber core.
  • Opens to any positions up to 45° to allow panoramic, uninterrupted views.
  • Meets requirements for emergency escape. (except size CK04).

Operation:

  • The window is opened by means of a handle placed at the bottom sash.
  • Sash can also be rotated 180° and locks in place for the ease of cleaning of the outer pane.

Warranty:

  • Ten-year guarantee for windows and panes.
  • Three-year guarantee for electrical items and blinds.

Standard product features

Internal frame and sash finish:

White lacquer finish on moulded polyurethane around a timber core.

Support rafters:

Supplied in the same finish as the roof windows.

Options

Glazing:

- Code 34:

  • Thermal performance (U-value): 1.3. W/m²K.
  • Sound insulation (Rw): 35. dB.
  • Light Transmittance (Tv): 0.53.
  • Total solar energy transmittance (g): 0.51.

- Code 60:

  • Thermal performance (U-value): 1.3 W/m²K.
  • Sound insulation (Rw): 37 dB.
  • Light Transmittance (Tv): 0.62.
  • Total solar energy transmittance (g): 0.30.

- Code 62:

  • Thermal performance (U-value): 0.96 W/m²K.
  • Sound insulation (Rw): 42 dB.
  • Light Transmittance (Tv): 0.73.
  • Total solar energy transmittance (g): 0.52.

- Code 66:

  • Thermal performance (U-value): 1.0 W/m²K.
  • Sound insulation (Rw): 37 dB.
  • Light Transmittance (Tv): 0.71.
  • Total solar energy transmittance (g): 0.52.

- Code 70:

  • Thermal performance (U-value): 1.3 W/m²K.
  • Sound insulation (Rw): 35 dB.
  • Light Transmittance (Tv): 0.68.
  • Total solar energy transmittance (g): 0.46.

Energy efficiency installation collars:

  • Insulation collar – Code BDX: Optimizes the insulation around the window frame by preventing heat loss and eliminating cold bridges. BDX 2000 variant Includes underfelt collar BFX.
  • Underfelt collar – Code BFX: Ensures a weathertight seal between the roof window and the roof.
  • Vapour barrier collar – Code BBX: Provides vapour control and air permeability seal.

Flashing:

Flashings are available in materials and finishes to match roof window cladding.

- Code EBL 0021B:

  • For standard installation into slate and flat roofing materials up to 8 mm thick: not suitable for interlocking slate.
  • 18 mm gap between units.
  • Roof pitch 15–90º.

- Code EBW 0021B:

  • For standard installation into flat and profiled roofing materials up to 120 mm thick, including profiled sheeting and interlocking slates.
  • 18 mm gap between units.
  • Roof pitch 15–90º.

- Code EBP 0021B:

  • For standard installation into plain tiles up to 14 mm thick.
  • 18 mm gap between units.
  • Roof pitch 25-90º.

- Code EBL 0021C:

For CK02, CK04 and CK06 size windows only.

  • For standard installation into slate and flat roofing materials up to 8 mm thick: not suitable for interlocking slate.
  • 50 mm gap between units.
  • Roof pitch 15–90º.

- Code EBW 0021C:

For CK02, CK04 and CK06 size windows only.

  • For standard installation into flat and profiled roofing materials up to 120 mm thick, including profiled sheeting and interlocking slates.
  • 50 mm gap between units.
  • Roof pitch 15–90º.

- Code ZWC:

  • Window profile set to be used in conjunction with on-site weathering for non-standard roofing materials.
  • Roof pitch 15–90º.
  • For further details please contact VELUX.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-25-99/370 Rigid polyurethane frame roof window units

NBS Specification

NBS Buliding logo
This product is associated with the following NBS clauses:

Product specification

An important note about specifying

Manufacturer

Name:

VELUX Company Ltd

Tel:

+44 (0)1592 778225

Product reference

GPU manually operated, white polyurethane, top-hung roof window, twin installation

Roof pitch

[ ______ ]

Number of windows in group

[ ______ ]

Distance between side frames

[18 mm]
-
Standard frame gap.
[50 mm]
-
CK02, CK04 and CK06 only.

Support rafters

[Not required]
[EBY W20 2000]
-
2000 mm long, 18 mm frame gap only.
[EBY W27 2000]
-
2700 mm long, 18 mm frame gap only.
[EBY W35 2000]
-
3500 mm long, 18 mm frame gap only.

Window

 - Code:
[GPU CK04]
-
Standard size 550 mm wide x 978 mm high, effective daylight area 0.29 m².
[GPU CK06]
-
Standard size 550 mm wide x 1178 mm high, effective daylight area 0.37 m².
[GPU FK06]
-
Standard size 660 mm wide x 1178 mm high, effective daylight area 0.47 m².
[GPU MK04]
-
Standard size 780 mm wide x 978 mm high, effective daylight area 0.47 m².
[GPU MK06]
-
Standard size 780 mm wide x 1178 mm high, effective daylight area 0.59 m².
[GPU MK08]
-
Standard size 780 mm wide x 1398 mm high, effective daylight area 0.72 m².
[GPU SK06]
-
Standard size 1140 mm wide x 1178 mm high, effective daylight area 0.95 m².
[GPU PK08]
-
Standard size 942 mm wide x 1398 mm high, effective daylight area 0.92 m².
[GPU PK10]
-
Standard size 942 mm wide x 1600 mm high, effective daylight area 1.07 m².
[GPU UK08]
-
Standard size 1340 mm wide x 1398 mm high, effective daylight area 1.40 m².
[GPU FK08]
-
Non-standard size 660 mm wide x 1398 mm high, effective daylight area 0.58 m².
[GPU MK10]
-
Non-standard size 780 mm wide x 1600 mm high, effective daylight area 0.85 m².
[GPU PK06]
-
Non-standard size 942 mm wide x 1178 mm high, effective daylight area 0.75 m².
[GPU SK08]
-
Non-standard size 1140 mm wide x 1398 mm high, effective daylight area 1.16 m².
[GPU SK10]
-
Non-standard size 1140 mm wide x 1600 mm high, effective daylight area 1.35 m².
 

Finish

 - Internal frame and sash:

White polyurethane lacquer – Code 0

 
 - External cladding:
[Grey aluminium; colour reference NCS S-7500-N - Code 0]
[Untreated copper – Code 1]
[Titanium zinc – Code 3]
[Painted aluminium – Code 8, colour]
-
Insert RAL or NCS colour reference.
 

Glazing

[34]
-
6.4 mm laminated white opaque inner pane; 15 mm Argon filled cavity; 4 mm toughened outer pane with low-e coating.
[60]
-
6.8 mm laminated inner pane with low-e coating; 15 mm Argon filled cavity; 6 mm toughened outer pane with easy to clean and low-e coatings.
[62]
-
6.8 mm laminated inner pane with low-e coating; 10 mm Krypton filled cavity; 3 mm heat strengthened mid pane with low-e coating; 10 mm Krypton filled cavity; 8 mm toughened outer pane with anti-dew coating.
[66]
-
6.8 mm laminated inner pane with low-e coating; 12 mm Krypton filled cavity; 3 mm heat strengthened mid pane with low-e coating; 12 mm Krypton filled cavity; 4 mm toughened outer pane with easy to clean and anti-dew coatings.
[70]
-
6.8 mm laminated inner pane with low-e coating; 15 mm Argon filled cavity; 4 mm toughened outer pane.

Blinds, Awning and Shutter

 - Type:
[Not required]
[Blackout blind – Code DKL]
[Blackout energy blind – Code FHC]
[Duo blackout blind – Code DFD]
[External awning blind – Code MHL]
[External roller shutter – Code SHL]
[Flying pleated blind – Code FHL]
[Insect screen – Code ZIL]
[Roller blind – Code RFL]
[Roman blind – Code FHB]
[Solar powered blackout blind – Code DSL]
[Solar powered blackout energy blind – Code FSC]
[Solar powered external awning blind – Code MSL]
[Solar powered external roller shutter – Code SSL]
[Solar powered pleated blind – Code FSL]
[Solar powered roller blind – Code RSL]
[Venetian blind – Code PAL]
 
 - Colour:
[Not applicable]
[As schedule ___]
-
Refer to VELUX Blinds and Shutters brochure for available colours and patterns.
 
 - Operation:
[Not applicable]
[Manual]
 

Energy efficiency installation collars

[Insulation Collar – Code BDX 2011]
-
Includes BFX, for 18 mm gap only.
[Underfelt Collar – Code BFX 1000]
[Vapour Barrier Collar – Code BBX 0000]

Flashings

[EBL 0021B]
-
18 mm gap between units; for standard installation into slate up to 8 mm thick; roof pitch 15–90º.
[EBW 0021B]
-
18 mm gap between units; for standard installation into tiles up to 120 mm in profile; roof pitch 15–90º.
[EBP 0021B]
-
18 mm gap between units; for standard installation into plain tiles up to 14 mm thick; roof pitch 25–90º.
[EBL 0021C]
-
50 mm gap between units; for standard installation into slate up to 8 mm thick; roof pitch 15–90°; CK02, CK04 and CK06 only.
[EBW 0021C]
-
50 mm gap between units; for standard installation into tiles up to 120 mm in profile; roof pitch 15–90º; CK02, CK04 and CK06 only.
[ZWC]
-
For standard installation where an on-site flashing is required; roof pitch 15–90°.

Accessories

[None]
[Locking handle – code 028323]

Manufacturer details

Woodside Way,
Glenrothes,
Fife, KY7 4ND
Tel +44 (0)1592 778225
Fax +44 (0)1592 776980
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