How and where to use guide

VELUX Insulation Collar 94x160cm BDX PK10 2000

Typical applications and where to use

The BDX Insulation Collar is used during the installation of VELUX roof windows and Sun Tunnel systems in both new build construction and refurbishment projects. It forms part of the complete installation assembly, working to seal the gap between the roof window frame and the roof structure. This collar is essential for maintaining weather-tightness and thermal performance around the window opening, preventing water ingress and heat loss at this critical junction point.

New build pitched roof installations with VELUX roof windows
Refurbishment projects upgrading existing roof openings
Sun Tunnel installations requiring weather-tight flashing
Projects requiring multiple roof windows (pack of 10 units)
Standard UK roof pitches and conditions

Installation and usage steps

The insulation collar must be installed as part of the complete VELUX roof window assembly. Position the collar around the window frame opening before securing it to the roof structure, ensuring it sits flush and level. The collar works in conjunction with your chosen VELUX window system and associated flashing components to create a complete weather-tight seal. Always follow the specific installation instructions provided with your VELUX roof window system, as the collar must be integrated correctly with the window frame and roof membrane to achieve proper performance.

Position collar around the window frame opening before final fixing
Ensure collar sits level and flush with surrounding roof structure
Integrate with VELUX window frame and roof flashing components
Follow VELUX system-specific installation guidance for your window model
Check weather-tightness of seal before completing roof covering

Compatibility and limitations

This collar is engineered specifically for VELUX roof window and Sun Tunnel systems. It is not suitable for use with other manufacturers' roof windows or skylights. Ensure you have confirmed compatibility with your specific VELUX window model before ordering. The 940 x 1600mm dimensions are fixed, so verify these match your installation requirements. This product is designed for standard pitched roof applications in UK conditions.

Compatible only with VELUX roof window and Sun Tunnel ranges
Verify model compatibility before installation
Fixed dimensions of 940 x 1600mm – confirm suitability for your opening
Designed for pitched roof installations
Not suitable for flat roof or non-VELUX window systems

Maintenance and on-site tips

Once installed as part of the complete VELUX window assembly, the insulation collar requires no routine maintenance beyond general roof inspection. During installation, protect the collar from damage and ensure it remains clean and free from debris before sealing. Store the pack in dry conditions on site to prevent any moisture absorption before use. Inspect the weather-tight seal periodically as part of standard roof maintenance to ensure long-term building envelope integrity.

Store in dry conditions before installation
Keep collar clean and debris-free during installation
Protect from damage during roof works
Include in routine roof inspections to verify seal integrity
Do not attempt to modify or cut the collar dimensions