How and where to use guide
VELUX Underfelt Collar 114x118cm BFX SK06 1000
Typical applications and installation
Install the underfelt collar during skylight fitting, positioning it around the perimeter of the SK06 frame before securing the unit to the roof structure. The 114x118cm size accommodates standard roof configurations and timber thicknesses. The felted construction allows for straightforward installation without specialist tools. Ensure the collar sits flush against both the skylight frame and the timber roof grade to create an effective seal. This product is suitable for new installations and replacement work on both pitched residential roofs and commercial flat or pitched roof applications.
- Position collar around skylight perimeter before final frame fixing
- Confirm roof timber is grade F16 or F24 before installation
- Ensure full contact between collar and frame for weather-tight seal
- Use on both new skylight installations and retrofit projects
Compatibility and limitations
This collar is specifically designed for VELUX SK06 skylights and will not fit other skylight models or sizes. It is engineered exclusively for timber roof grades F16 and F24; do not use on other structural materials or timber grades as the seal integrity cannot be guaranteed. The 114x118cm dimensions are fixed, so measure your roof opening carefully before ordering to ensure correct fit.
- Compatible only with SK06 skylight model
- Suitable for F16 and F24 timber grades only
- Fixed size 114x118cm - confirm roof opening dimensions before purchase
- Not suitable for metal, concrete, or other non-timber roof structures
On-site handling and maintenance
Store the underfelt collar in dry conditions before installation to preserve the felted material integrity. During installation, handle carefully to avoid creasing or folding the collar excessively, as this may compromise the weather seal. Once installed, the durable felted construction requires minimal maintenance. Periodically inspect the collar during routine roof maintenance to ensure it remains in contact with the frame and shows no signs of deterioration. If water ingress occurs around the skylight, check that the collar has not shifted or become compressed, and reseat if necessary.
- Store in dry conditions prior to installation
- Handle carefully to avoid creasing the felted material
- Inspect periodically during roof maintenance checks
- Reseat collar if movement or compression is detected