How and where to use guide
VELUX Insulation Collar 55x98cm BDX CK04 2011
Where to use this product
The VELUX Insulation Collar is intended for use in timber-constructed lofts where a CK04 VELUX roof window is being installed. It is fitted around the window frame opening to create a thermal seal between the window and the surrounding timber frame structure. This product is suitable for domestic loft conversions and renovations in UK buildings where improved energy efficiency is required.
- Timber-framed loft spaces only
- CK04 VELUX roof windows exclusively
- Domestic loft conversions and extensions
- Applications requiring thermal insulation around roof windows
Installation and fitting
The insulation collar should be fitted during the installation of your CK04 VELUX roof window. The 55x98cm size is designed to match the CK04 window dimensions precisely. Position the collar around the window frame opening before securing the window into place, ensuring it sits snugly against both the window frame and the surrounding timber structure. The straightforward design allows fitting to be completed as part of the standard roof window installation process without requiring specialist tools or techniques.
- Fit during roof window installation, not as a retrofit
- Position collar around frame opening before final window securing
- Ensure snug fit against window frame and timber structure
- No specialist tools required for installation
Performance and maintenance
The fiberglass construction with baked enamel finish provides durability in typical UK loft conditions, including temperature fluctuations and moisture exposure common in unheated roof spaces. The collar requires minimal maintenance once installed. Periodically check that the collar remains in place and that no gaps have developed around the window frame, as these would reduce thermal performance. The baked enamel finish protects the fiberglass from weathering and should not require additional treatment.
- Durable fiberglass with protective baked enamel finish
- Minimal maintenance required after installation
- Check periodically for gaps or movement around window frame
- No additional coating or treatment needed
Limitations and compatibility
This collar is sized and designed exclusively for CK04 VELUX roof windows and is not compatible with other window models or sizes. It is intended for timber-frame construction only and should not be used in metal-framed or non-timber loft structures. The collar is a thermal insulation product and does not provide structural support or weatherproofing; it works in conjunction with the roof window itself to manage heat loss around the frame opening.
- CK04 VELUX windows only - not compatible with other models
- Timber-frame construction required
- Thermal insulation function only - not a structural or weatherproofing product
- Must be used as part of complete roof window installation