How and where to use guide
VELUX EKW MK08 S00W02 Duo Flashing for tiles up to 120mm in profile (100mm gap) 78 X 140CM INCLUDES EKW MK08 2007ME - EDW MK08 2000
Typical applications and suitability
This duo flashing is intended for pitched roof installations where roof windows are being installed into tiled roof coverings. It works with both clay and concrete tiles provided the tile profile does not exceed 120mm in height. The flashing is suitable for standard roof window openings and can be used in new build construction or when replacing and upgrading existing roof windows in refurbishment projects. The 100mm gap allowance means the flashing accommodates typical roof window frame positioning above the tile surface.
- New build pitched roof installations with tiled coverings
- Refurbishment and replacement of existing roof windows
- Tiles up to 120mm profile height
- Standard roof window opening sizes (78 × 140cm)
- Both residential and commercial applications
Installation and positioning
The duo flashing comprises two components: the upper flashing (EKW MK08 2007ME) and lower flashing (EDW MK08 2000). Both must be installed to create a complete weather-tight seal around the roof window. Position the lower flashing first, ensuring it sits correctly on the tile surface below the window opening. The upper flashing then overlaps above the window frame, creating a stepped weather-tight barrier that sheds water down and away from the window. Ensure the flashing sits flush against the roof window frame and integrates neatly with the tile profile without gaps or misalignment. The flashing must be secured according to VELUX installation guidance to prevent movement or water ingress.
- Install lower component (EDW MK08 2000) first on the tile surface
- Position upper component (EKW MK08 2007ME) above the window frame
- Ensure both components overlap correctly to shed water away
- Secure flashing firmly to prevent movement or lifting
- Check alignment with tile profile for neat finish
Limitations and site considerations
This flashing is designed specifically for tiles up to 120mm profile. Do not use on roof coverings with tile profiles exceeding this height, as the flashing will not provide adequate weather protection. The 100mm gap allowance is fixed; if your roof window frame sits outside this tolerance, an alternative flashing size or type may be required. The flashing is sized for standard roof window openings at 78 × 140cm; non-standard opening sizes will need different flashing dimensions. Installation must follow VELUX technical guidance to maintain warranty and weather-tight performance. Improper installation or use with unsuitable tile profiles will compromise water shedding and may lead to leaks.
- Not suitable for tiles exceeding 120mm profile height
- 100mm gap allowance is fixed; check frame positioning before ordering
- Sized for standard 78 × 140cm roof window openings only
- Installation must follow VELUX guidance for warranty validity
- Unsuitable for flat roofs or non-tiled roof coverings
On-site handling and maintenance
Store the flashing components in a dry location on site to prevent damage or corrosion before installation. Handle carefully to avoid denting or bending the metal components, which could compromise the weather seal. Once installed, the flashing requires minimal maintenance. Periodically inspect the seal around the roof window frame and check that the flashing remains secure and free from debris. Clear any moss, lichen, or leaf litter from the upper flashing surface to maintain water shedding. If gaps or movement are detected, re-secure the flashing immediately to prevent water ingress. In areas with heavy rainfall or exposure, inspect the flashing annually to ensure continued weather-tight performance.
- Store dry on site before installation
- Handle carefully to avoid denting or deformation
- Inspect annually for security and debris accumulation
- Clear moss and leaf litter to maintain water shedding
- Re-secure immediately if movement or gaps are detected