Fixing and buying guide
VELUX Centre-Pivot Roof Windows White Painted 55x98cm GGL CK04 2070
What's included and key features
This centre-pivot roof window comes pre-glazed with safety lamination, toughened glass, and a UV filter as standard. The glazing also incorporates VELUX rain noise reduction technology. A removable and cleanable ventilation filter is supplied to protect your home from dust and insects during ventilation. The window features pre-fitted brackets that allow you to quickly click blinds into place without additional fixings. The top control bar can be opened to a ventilation position, allowing fresh air circulation through a closed window.
- Size: 55x98cm (CK04 dimension)
- Finish: White painted frame
- Operation: Centre-pivot with top control bar
- Glazing: Safety laminated, toughened, UV filtered with rain noise reduction
- Includes removable ventilation filter and blind brackets
- 180-degree rotation for internal cleaning access
Who this window suits
The GGL CK04 is ideal for homeowners and builders installing roof windows in loft conversions, attic bedrooms, and upper-floor rooms where traditional side-hung windows are not practical. The centre-pivot design with top operation makes it perfect for spaces where you want to position beds, desks, or other furniture directly below the window without obstruction. The lower installation position enabled by the top control bar is particularly beneficial if you want an excellent view while standing or seated.
- Loft conversions and attic bedrooms
- Rooms with limited wall space for furniture
- Properties where internal cleaning access is important
- Homes requiring ventilation without full window opening
Sizing and roof compatibility
The CK04 dimension (55x98cm) is a standard VELUX size. Before ordering, confirm that your roof opening or intended installation area matches this specification. The window is designed for pitched roofs and requires a suitable roof structure to support the frame and flashing. Check your roof pitch and rafter spacing with your surveyor or builder to ensure compatibility. If your roof opening is non-standard, contact a VELUX installer or your merchant for advice on alternative sizes or bespoke solutions.
- Confirm roof opening dimensions match 55x98cm
- Verify roof pitch is suitable for centre-pivot installation
- Check rafter spacing and structural support
- Consult a surveyor if roof opening is irregular
Pre-installation checks and preparation
Before fitting, inspect the window frame and glazing for any transport damage. Ensure the roof structure is sound, dry, and free from rot or damage. The installation area must be properly prepared with adequate ventilation and damp-proofing measures in place. Have the correct flashing kit for your roof type ready before installation begins. If you are not experienced in roof window installation, engage a qualified VELUX installer to ensure the window is fitted correctly and all weatherproofing is secure. Improper installation can lead to water ingress and structural damage.
- Inspect frame and glazing for damage on delivery
- Check roof structure is sound and dry
- Prepare installation area with proper ventilation
- Source the correct flashing kit for your roof type
- Consider professional installation for safety and warranty compliance