How and where to use guide
VELUX Twin and Combination Flashings 55x98cm EKJ CK04 S0021E
Installation and Suitable Applications
These flashings are designed specifically for timber frame construction where roof slopes do not exceed 30 degrees. They are ideal for protecting the junction between roof coverings and timber elements, preventing water from penetrating into the building structure. The 55 x 98cm dimensions make them suitable for standard roof configurations on projects up to 10m in length. Installation should follow the manufacturer's guidance to ensure the flashing sits correctly and creates a complete watertight seal. These flashings work in conjunction with other roofing materials and are appropriate for both professional construction and serious DIY applications.
- Maximum roof slope: 30 degrees
- Suitable for project lengths up to 10m
- Designed for timber frame construction junctions
- Compatible with standard roofing materials
- Available in oak and pine finishes to match timber grades
Material and Durability
The EKJ CK04 S0021E flashings are manufactured from PVC, providing reliable weather resistance and durability. The material is engineered to withstand exposure to rain, wind and temperature variations typical of UK roof conditions. The choice of oak or pine finishes allows you to select a flashing that complements your timber frame construction and maintains visual consistency across the project.
- PVC construction for weather resistance
- Durable against water ingress and weathering
- Available in oak and pine to match timber grades
- Designed for long-term performance in exposed roof positions
On-Site Handling and Maintenance
Store flashings in dry conditions before installation to prevent damage. During installation, ensure the flashing is positioned correctly to direct water away from the timber frame junction. Once installed, inspect periodically to confirm the seal remains intact and that no debris has accumulated that might compromise water drainage. The PVC material requires minimal maintenance, though keeping the flashing clear of moss, leaves and other debris will help maintain its effectiveness. Any gaps or movement should be addressed promptly to prevent water ingress.
- Store in dry conditions before use
- Position to direct water away from timber junctions
- Inspect regularly for gaps or movement
- Keep clear of debris and vegetation
- Address any damage or separation immediately