How and where to use guide
VELUX Insulation Collar 55x118cm BDX CK06 2000
Where to use this product
Install the VELUX Insulation Collar in any loft space or roof void where a CK06 roof window is fitted into a timber frame opening. It is suitable for new build installations, existing property renovations, and loft conversion projects. The collar works effectively in standard domestic roof spaces with typical insulation depths and is compatible with common loft insulation materials including fibre batts and cellulose.
- New build properties with CK06 roof windows in timber frames
- Loft conversions and roof space renovations
- Properties being upgraded to improve thermal performance
- Any installation where the roof window opening measures approximately 55×118cm
Installation and application
The collar is designed for straightforward installation around the timber frame opening of your CK06 roof window. Position the fibre-reinforced plastic collar to create a tight seal between the window frame and the surrounding insulation materials. The 55×118cm dimensions are sized to fit standard CK06 openings in typical timber frame construction. Install the collar before or during the placement of your loft insulation to ensure the thermal barrier is complete and uninterrupted.
- Position the collar around the timber frame opening before insulation installation
- Ensure the collar sits flush against the window frame to create a complete seal
- Work with fibre batts, cellulose, or other standard loft insulation materials
- Check that the collar is fully seated and there are no gaps between the collar and frame
Performance and maintenance
The fibre-reinforced plastic construction provides durability and maintains its thermal sealing properties over time. Once installed, the collar requires minimal maintenance. Periodically check that the collar remains in place and that insulation materials have not shifted away from the seal. Ensure that loft ventilation is not obstructed by the collar or surrounding insulation, as adequate air circulation is necessary for roof health and to prevent condensation issues.
- Inspect the collar annually to confirm it remains properly seated
- Verify that insulation materials have not compressed or shifted away from the seal
- Maintain clear loft ventilation pathways to prevent moisture accumulation
- Do not compress or deform the collar during or after installation
Important limitations and considerations
This collar is designed specifically for CK06 roof windows in timber frame openings. It is not suitable for other window sizes or frame types. The collar works in conjunction with standard loft insulation materials and does not replace proper insulation installation. Building regulations compliance depends on correct installation of both the collar and surrounding insulation. Always follow VELUX installation guidance and local building control requirements for your specific project.
- Only use with CK06 roof windows; not compatible with other VELUX sizes
- Designed for timber frame installations only
- Must be used alongside appropriate loft insulation materials
- Installation must comply with current building regulations and building control requirements