NBS Source
List your products

GPL manually operated, top-hung roof window, twin installation

Third party certifications:
  • BBA Agrément Certificate

    Certificate type

  • QA Certificate

    Certificate type

VELUX Company Ltd

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

Jump to:
+44 (0)1592 778225 www.velux.co.uk
Description

Manually operated, top hung roof window 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.
  • Opens to any positions up to 45° to allow panoramic, uninterrupted views.
  • Meets requirements for emergency egress/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.

General information
Features

Can be installed in roof pitches 15–55° and up to 75° with special springs

Opens to any positions up to 45° to allow panoramic, uninterrupted views

Meets requirements for emergency egress/escape. (except size CK04)

Uniclass 2015 Wood frame roof window units (Pr_30_59_98_97)
Specification data
Product Reference

GPL manually operated, top-hung roof window, twin installation

Roof pitch

Insert requirements.

Number of windows in group

Insert requirements.

Distance between side frames

18 mm

Standard frame gap.

50 mm

CK02, CK04 and CK06 only.

Support rafters

Not required

EBY W20 3000

2000 mm long. 18 mm frame gap only.

EBY W27 3000

2700 mm long. 18 mm frame gap only.

EBY W35 3000

3500 mm long. 18 mm frame gap only.

Window -
Window code

GPL CK04

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

GPL CK06

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

GPL FK06

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

GPL MK04

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

GPL MK06

Standard size 780 mm wide x 1178 mm high, effective daylight area 0.59 m².

GPL MK08

Standard size 780 mm wide x 1398 mm high, effective daylight area 0.72 m².

GPL PK08

Standard size 942 mm wide x 1398 mm high, effective daylight area 0.92 m².

GPL PK10

Standard size 942 mm wide x 1600 mm high, effective daylight area 1.07 m².

GPL SK06

Standard size 1140 mm wide x 1178 mm high, effective daylight area 0.95 m².

GPL UK04

Standard size 1340 mm wide x 978 mm high, effective daylight area 0.91 m².

GPL UK08

Standard size 1340 mm wide x 1398 mm high, effective daylight area 1.40 m².

GPL FK08

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

GPL MK10

Non-standard size 780 mm wide x 1600 mm high, effective daylight area 0.85 m².

GPL PK04

Non-standard size 942 mm wide x 978 mm high, effective daylight area 0.60 m².

GPL PK06

Non-standard size 942 mm wide x 1178 mm high, effective daylight area 0.75 m².

GPL SK08

Non-standard size 1140 mm wide x 1398 mm high, effective daylight area 1.16 m².

GPL SK10

Non-standard size 1140 mm wide x 1600 mm high, effective daylight area 1.35 m².

Finish -
Internal frame and sash

White Painted – Code 2

Lacquered Natural Pine – Code 3

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

68

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.

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 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 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

Flashing

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 028321

Standard product features

Support rafters:

Supplied in the same finish as the roof windows.

Product Options

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 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 2011: Optimizes the insulation around the window frame by preventing heat loss and eliminating cold bridges. 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.

Third party certifications
  • 08/4608 : Product sheet 2: VELUX top hung roof windows
  • CE marked: EN 14351-1:2006 + AI:2010
  • FSC/PEFC certified
Similar products from VELUX Company Ltd