How and where to use guide
VELUX Twin and Combination Flashings 114x118cm EKL SK06 0021E
Typical applications and window configurations
This flashing is specified for pitched roof installations featuring two SK06 VELUX windows. It accommodates both twin window setups, where two identical windows sit adjacent to each other, and combination configurations that may mix window types within the same flashing footprint. The single-piece design maintains a consistent roof line appearance and reduces visible joints that could compromise weatherproofing. Use this flashing when installing multiple windows on the same roof slope rather than installing separate individual flashings for each window.
- Twin SK06 window installations side by side on pitched roofs
- Combination setups with mixed window configurations
- Pitched roof pitches within standard residential and commercial ranges
- Situations where a unified roof line appearance is required
Installation and positioning
Position the flashing to align with the top and sides of both SK06 window frames before securing. The 114x118cm dimensions are engineered to span the combined width of two SK06 windows plus the integrated weatherproofing margins. Ensure the flashing sits flush against the roof slope and window frames, with no gaps that could allow water penetration. The single-piece construction means careful alignment during installation is critical to avoid repositioning once the seal begins to set.
- Align flashing with window frame edges before final securing
- Check that the flashing sits flush on the pitched roof surface
- Ensure no gaps exist between flashing and window frames
- Verify correct orientation for your roof pitch before installation
Weatherproofing and maintenance
The integrated weatherproofing design creates a continuous seal across both windows, protecting the roof structure and interior spaces from water ingress. Inspect the flashing periodically, particularly after severe weather, to confirm the seal remains intact and no debris has accumulated along the edges. Clean gutters and roof surfaces regularly to prevent water pooling or blockages that could compromise the flashing's effectiveness. Any visible cracks, gaps, or separation from the window frames should be addressed promptly to maintain watertight integrity.
- Inspect seals and joints after heavy rain or storms
- Clear debris and leaves from around the flashing edges
- Check for water staining on interior ceilings below the installation
- Address any gaps or separation immediately to prevent water damage
Limitations and on-site considerations
This flashing is designed specifically for SK06 window sizes and pitched roof applications. It is not suitable for flat roofs, different window sizes, or single-window installations where individual flashings would be more appropriate. The single-piece design means it cannot be easily modified on site; ensure measurements and window positioning are confirmed before ordering. Standard pitched roof pitches are supported, but unusual roof angles or non-standard configurations may require specialist assessment.
- Confirm both windows are SK06 size before installation
- Not suitable for flat roofs or non-pitched applications
- Cannot be cut or modified on site without compromising weatherproofing
- Verify roof pitch falls within standard residential ranges