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VELUX centre-pivot roof window · Melbourne supply
Match the flashing to the roof
Build the complete GGL CK04 package
✔ VELUX Supply & Install ✔ Custom Flashing ✔ Noble Park Pickup & Melbourne Delivery ✔ 2026 Cost Guide ✔ Custom Flashing Guide
VELUX GGL CK04 Centre-Pivot Roof Window 550 × 980mm
Original price was: $915.33.$759.72Current price is: $759.72.
The VELUX GGL CK04 is a centre-pivot roof window for in-reach attic, loft and sloped-ceiling rooms. It measures 550 × 980mm, provides approximately 371 × 783mm of internal glass, 0.29m² daylight area and 0.38m² ventilation area, with centre-pivot operation via the top control bar. VELUX lists the product at approximately 27.4kg including flashing. Suitable roof pitch: 15°–90°. Matching EDW CK04 flashing and FHC CK04 honeycomb blind are sold separately.
VELUX GGL CK04 Centre-Pivot Roof Window 550 × 980mm
The VELUX GGL CK04 is a centre-pivot roof window for in-reach attic, loft, mezzanine and sloped-ceiling rooms. It combines a direct outside view, natural ventilation and high-performance double glazing with approximately 371 × 783mm of internal glass, 0.29m² daylight area and 0.38m² ventilation area.
550 × 980mm overall 371 × 783mm internal glass 0.29m² daylight 0.38m² ventilation 27.4kg incl. flashing 15°–90° roof pitch In-reach roof window
Centre-Pivot OperationTop control bar for passive ventilation and centre-pivot opening; the sash rotates up to 180° for inside cleaning.
High-Performance GlazingApprox. 70% radiant heat block, 95% UV block, laminated inner pane and Low-E³ double glazing.
27.4kg Including FlashingVELUX technical-sheet weight for delivery, lifting and roof-access planning.
Supply or InstallationNoble Park pickup, Melbourne delivery, or professional installation for suitable Melbourne projects.
Choose the roof window for the room
Why Choose the VELUX GGL CK04?
Roof windows work differently from high-level skylights: they are designed to be within reach, give the room a direct outside view and allow the user to operate and clean the sash from inside.
Rooms GGL CK04 Can Suit
- Attic offices
- Loft bedrooms
- Mezzanines
- Studios
- Narrow sloped-ceiling rooms
Why This Format Works
- Direct outside view rather than overhead daylight only
- Natural ventilation for attic and loft spaces
- Designed for in-reach manual operation
- 180° cleaning position from inside the room
- Matching flashing and blind system by exact CK/MK/SK code
Same-size alternative: compare GPL CK04 before ordering. It has the same nominal size and daylight area but a different opening style and pitch range.
Operation and reach
How the GGL CK04 Opens
Top control bar for passive ventilation and centre-pivot opening; the sash rotates up to 180° for inside cleaning.
Designed to Be Within Reach
Plan the finished window height before framing and plastering. The control point should suit the room, furniture layout and intended user.
Roof Window vs Standard Skylight
If the opening will be high or difficult to reach, a standard VS, VSE or VSS skylight may be more practical than an in-reach GGL/GPL roof window.
Which Flashing Should You Use With GGL CK04?
Roof-window flashing is sold separately. Match both the CK04 size code and the actual roof material before ordering.
VELUX FACTORY FLASHING EDW / EDL / EKW
- EDW CK04: compatible tile and low-profile corrugated roofs
- EDL: suitable slate / shingle applications
- EKW: suitable multiple-window combinations; VELUX specifies 100mm spacing
- Standard EDW is not suitable for wide-span profiles such as TrimDeck or Klip-Lok
PITCH & SPECIAL ROOFS Check Pitch Before the Roof Is Cut
GGL CK04 is specified for 15°–90°. For roofs below 15°, VELUX says the roof window needs to be raised to at least 15° and custom flashed after project assessment.
If the roof is TrimDeck, Klip-Lok or another non-standard profile, send roof photos before ordering flashing.
Real Central Skylights roof work
Pitched-Roof Flashing & Drainage Examples
These genuine Central Skylights images demonstrate the pitched-roof flashing principles used around VELUX products. They are not labelled as exact GGL CK04 installations unless the project documentation proves that model.
VELUX EDW Tile-Roof DetailReal Central Skylights work showing the pleated apron and side flashing integrated with profiled roof tiles.
Roof IntegrationWindow size, roof pitch, roof covering and flashing need to be planned as one roof system.
Flashing & DrainageCorrect detailing guides roof water around the opening and back into the roof drainage path.
The exact products shown may differ from GGL CK04; the photos are used as genuine Central Skylights installation evidence.
Not sure whether GGL CK04 is the right roof window?
Send room, ceiling and roof photos. We can help compare GGL vs GPL, size, installation height, flashing, blind and whether a standard skylight would be more practical.
About the VELUX GGL CK04
The GGL CK04 is a centre-pivot in-reach roof window designed for attic, loft and sloped-ceiling rooms.
- White pre-painted pine sash and frame
- Grey aluminium exterior cappings
- Laminated double glazing as standard
- Passive filtered ventilation while closed
- 180° cleaning position
- Flashing and blind sold separately
GGL CK04 Size, Daylight & Ventilation
| Overall frame | 550 × 980mm |
|---|---|
| Internal glass | 371 × 783mm |
| Daylight area | 0.29m² |
| Ventilation area | 0.38m² |
| VELUX listed weight | 27.4kg including flashing |
| Roof pitch | 15°–90° |
GGL CK04 Operation
Top control bar for passive ventilation and centre-pivot opening; the sash rotates up to 180° for inside cleaning.
In-reach matters: choose the roof-window position around comfortable operation, outside view and the final room layout—not only where it is easiest to cut the roof.
Roof Types & Flashing Options
| Tile / compatible low-profile corrugated | EDW CK04 |
|---|---|
| Slate / shingle | EDL |
| Multiple roof windows | EKW where applicable; 100mm spacing specified by VELUX |
| TrimDeck / Klip-Lok | Standard EDW is not suitable; ask for roof-specific flashing advice |
| Below 15° | Raise to at least 15° and custom flash after assessment |
Installation Height, Framing & Fall Prevention
Confirm rafter/truss spacing, structural opening, finished window height and local compliance before cutting the roof.
- Do not cut structural trusses without appropriate design
- Plan the finished height around comfortable in-reach use
- VELUX publishes opening-restriction guidance for roof windows
- Restrictor locks may be required where roof-window height is 1.7m or less, depending on the project and NCC requirements
- Confirm project-specific fall-prevention requirements before installation
GGL CK04 Specifications & 5 Buying FAQs
| Product | VELUX GGL CK04 |
|---|---|
| Type | Centre-Pivot in-reach roof window |
| Overall size | 550 × 980mm |
| Internal glass | 371 × 783mm |
| Daylight / ventilation | 0.29m² / 0.38m² |
| Weight | 27.4kg including flashing |
| Roof pitch | 15°–90° |
| U-value / SHGC | 1.30 W/m²K / 0.31 complete roof window |
| Visible light transmittance | 0.64 |
| Acoustic performance | 34dB |
| Heat / UV | Approx. 70% radiant heat block / 95% UV block |
| Blind | Matching FHC CK04 manual honeycomb blind available |
| Flashing | Sold separately; match full CK/MK/SK code and roof type |
1. Is VELUX GGL CK04 designed to be within reach?
Yes. GGL and GPL roof windows are designed for in-reach attic, loft and sloped-ceiling applications. For high/out-of-reach positions, compare standard manual, electric or solar skylights.
2. What flashing do I need for GGL CK04?
For a compatible tile or low-profile corrugated roof, the matching starting point is EDW CK04. Slate/shingle may require EDL; multiple-window layouts may use EKW; TrimDeck/Klip-Lok and special situations need different flashing advice.
3. How heavy is GGL CK04?
VELUX lists GGL CK04 at approximately 27.4kg, and the product-sheet footnote states that the weight includes flashing. Plan delivery, lifting and roof access accordingly.
4. What blind fits GGL CK04?
Use the matching FHC CK04 manual honeycomb blind. For older roof windows, check the VELUX data plate because newer accessories may not fit earlier generations.
5. Should I choose GGL or GPL?
Choose GGL for practical centre-pivot operation, top-bar control and the wider 15°–90° roof range. Choose the same-size GPL when top-hung opening and a clearer outside view are worth the premium and the roof is within 15°–55°.
Compare before ordering
Compare GGL CK04 With Nearby Roof Windows
Compare opening style, frame size, daylight area, roof-pitch range and weight before the roof opening and flashing are committed.
Complete the system
Flashing, Blind & Accessories
EDW CK04 Flashing
Match the exact CK/MK/SK roof-window code and actual roof profile.
View GGL / GPL EDW →FHC CK04 Honeycomb Blind
Manual honeycomb blind for light control, room darkening and additional comfort.
View FHC Blinds →Insect Screen Guidance
For GGL insect-screen requirements, confirm current Australian accessory compatibility before ordering, especially for older roof-window generations.
VELUX Premier DealerGenuine VELUX products and specialist advice.
12,000+ installsCentral Skylights installation experience since 2018.
Noble ParkMelbourne showroom and warehouse pickup.
Supply or InstallSupply-only or professional Melbourne installation.
Roof Window + Correct Flashing + Blind + Installation Advice
Central Skylights supplies genuine VELUX GGL/GPL roof windows, matched flashing and accessories for builders, roofers, renovators and homeowners.
Alva Maximus –
Excellent fit
Alger Roy –
This is the second installation of Velux Skylights in our attic. Since we were replacing the roof, we decided to have new skylights put in at the same time.
Basil Kevin –
I absolutely love these skylights—they’re worth every single penny!
Fergus Z –
I love this skylight
Darius F –
One package arrived damaged. Velux replaced the damaged part without much difficulty.
Aubrey C –
I’m extremely satisfied with the new Velux skylight. Your team and your product are outstanding
Gabriel –
Awesome Skylights
Elwyn –
Nice, I love natural light
Amyas R –
An excellent product that works flawlessly as a replacement for an aging plastic bubble skylight