Fixing and buying guide
VELUX Insulation Collar 114x118cm BDX SK06 2011
What this product is and who needs it
This insulation collar is a structural component that forms part of a complete VELUX roof window system. It is designed specifically for timber-framed roof constructions and works by creating a thermal break around the window perimeter. If you are installing a VELUX SK06 2011 roof window up to 1m in length, this collar helps prevent heat loss through the frame junction, improving overall building performance and reducing condensation risk at the window edges.
- Reduces thermal bridging around window frame
- Provides secure housing for insulation materials
- Suitable for both professional and DIY installation
- Part of the VELUX SK06 2011 system
Sizing and compatibility
This collar measures 114 x 118cm and is designed to accommodate roof windows up to 1m in length. Before ordering, verify that your VELUX roof window is a SK06 2011 model and that its length does not exceed 1m. Check your window specification sheet or contact VELUX directly if you are uncertain about compatibility. Installing an incorrectly sized collar will compromise the thermal performance and weathertightness of your installation.
- Dimensions: 114 x 118cm
- Maximum window length: 1m
- Compatible with VELUX SK06 2011 roof windows only
- Verify window model and length before purchase
Material and durability
The collar is manufactured from fibre-reinforced plastic, which provides strength and rigidity whilst remaining lightweight. The baked enamel coating protects against weathering, UV exposure, and moisture ingress, ensuring long-term durability in the roof environment. This material combination is specifically chosen for timber-framed applications where the collar must support insulation weight and resist the thermal and moisture stresses of the roof space.
- Fibre-reinforced plastic construction
- Baked enamel protective coating
- Resistant to weather and UV damage
- Designed for timber rafter compatibility
Pre-installation checks and preparation
Before fitting, ensure your roof structure is sound and that the rafter opening matches the collar dimensions. The collar must sit flush against the window frame and the surrounding timber, with no gaps that could allow air leakage or water ingress. Prepare your insulation materials in advance so they are ready to be secured within the collar once it is positioned. Check that your roof membrane and flashing system are compatible with this collar type, as it forms part of the complete weathertight assembly.
- Confirm rafter opening dimensions match collar size
- Inspect roof structure for soundness and level
- Have insulation materials ready before installation
- Verify compatibility with your roof membrane and flashing system
- Ensure collar sits flush with window frame and timber