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GPU Manually Operated, White Polyurethane, Top-Hung Roof Window, Twin Installation

Verified by manufacturer 4 months ago

VELUX Company Ltd

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°).

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+44 (0)1592 778873 Website

Application

For twin installations with 18 mm or 50 mm gap on roof pitches between 15–55° and up to 75° with special springs.

Description

Features and benefits:

  • 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).
  • 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.


Glazing:

- Code 68:

  • Thermal performance (U-value): 1.1 W/m²K.
  • Sound insulation (Rw): 35 dB.
  • Light Transmittance (Tv): 0.71.
  • Total solar energy transmittance (g): 0.52.

- 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.


Support rafters:

Supplied in the same finish as the roof windows.

General information

Color

White

Finish

Lacquered

Guidance for specification option:

Internal frame and sash is in a white lacquer polyurethane – Code 0 around a timber core, external cladding in grey aluminium; colour reference NCS S-7500-N - Code 0, Untreated copper – Code 1, Titanium zinc – Code 3, Painted aluminium – Code 8

Material

Timber

Guidance for specification option:

Timber core

Polyurethane

Guidance for specification option:

Polyurethane coated frames

Aluminium

Guidance for specification option:

Aluminium cladding

Size

-

Manufacturer guidance

Wide range of sizes to suit project requirements. Distance between side frames is 18 mm as standard or 50 mm

Width

18 mm

50 mm

Warranty description

Ten year

Guidance for specification option:

For window and pane

Three year

Guidance for specification option:

For electrical items and blinds

Uniclass

Pr_30_59_98_72 Rigid polyurethane frame roof window unitsPrimary

CAWS

L10/480 Roof windows

Product range

Roof window close coupled installation

Specification data - Rigid polyurethane frame roof window units

Standard

BBA Agrément Certificate.

Product performance

-

Whole window U-value

0.88–1.3 W/m²K.

Guidance for specification option:

Depending on product option.

Glazing or infill

-

Composition

Argon filled cavity or Krypton filled cavity.

Hardware

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

Operation

-

Type

Manual.

Guidance for specification option:

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

Fixing features

Insulation collar, underfelt collar and vapour barrier collar available for installation.

Accessories

None.

Locking handle.

Guidance for specification option:

code 028323

Execution

Fixing of plastics frames.

Internal frame and sash

White polyurethane lacquer.

Guidance for specification option:

Code 0

External cladding

Grey aluminium; colour reference NCS S-7500-N.

Guidance for specification option:

Code 0

Untreated copper.

Guidance for specification option:

Code 1

Titanium zinc.

Guidance for specification option:

Code 3

Painted aluminium.

Guidance for specification option:

Code 8, colour

Roof pitch

Guidance for specification option:

Insert requirements.

Number of windows in group

Guidance for specification option:

Insert requirements.

Distance between side frames

18 mm.

Guidance for specification option:

Standard frame gap.

50 mm.

Guidance for specification option:

CK02, CK04 and CK06 only.

Support rafters

Not required.

EBY W20 2000.

Guidance for specification option:

2000 mm long, 18 mm frame gap only.

EBY W27 2000.

Guidance for specification option:

2700 mm long, 18 mm frame gap only.

EBY W35 2000.

Guidance for specification option:

3500 mm long, 18 mm frame gap only.

Window code

GPU CK04.

Guidance for specification option:

Standard size 550 mm wide x 978 mm high, effective daylight area 0.29 m².

GPU CK06.

Guidance for specification option:

Standard size 550 mm wide x 1178 mm high, effective daylight area 0.37 m².

GPU FK06.

Guidance for specification option:

Standard size 660 mm wide x 1178 mm high, effective daylight area 0.47 m².

GPU FK08.

Guidance for specification option:

Non-standard size 660 mm wide x 1398 mm high, effective daylight area 0.58 m².

GPU MK04.

Guidance for specification option:

Standard size 780 mm wide x 978 mm high, effective daylight area 0.47 m².

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Glazing

68.

Guidance for specification option:

6.8 mm laminated inner pane with low-e coating; 12 mm Argon filled cavity; 3 mm heat strengthened mid pane with low-e coating; 12 mm Argon filled cavity; 4 mm toughened outer pane with easy to clean and low-e coatings.

62.

Guidance for specification option:

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.

Guidance for specification option:

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.

Guidance for specification option:

6.8 mm laminated inner pane with low-e coating; 15 mm Argon filled cavity; 4 mm toughened outer pane.

Type

Not required.

Blackout blind – Code DKL.

Blackout energy blind – Code FHC.

Duo blackout blind – Code DFD.

External awning blind – Code MHL.

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Colour

Not applicable.

As schedule.

Guidance for specification option:

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.

Guidance for specification option:

Includes BFX, for 18 mm gap only.

Underfelt Collar – Code BFX 1000.

Vapour Barrier Collar – Code BBX 0000.

Flashings

EBL 0021B.

Guidance for specification option:

18 mm gap between units; for standard installation into slate up to 8 mm thick; roof pitch 15–90º.

EBW 0021B.

Guidance for specification option:

18 mm gap between units; for standard installation into tiles up to 120 mm in profile; roof pitch 15–90º.

EBP 0021B.

Guidance for specification option:

18 mm gap between units; for standard installation into plain tiles up to 14 mm thick; roof pitch 25–90º.

EBL 0021C.

Guidance for specification option:

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.

Guidance for specification option:

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.

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Sustainability data

Embodied carbon

A1-A3 (production stage) as defined in BS EN 15804

2.7 kg·CO₂e/kg

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