Installation products
Every roof installation job requires skill and experience as well as the right tools and materials.
The VELUX installation product system is designed and optimised to support the installation workflow.
By using the complete VELUX installation product system, you can achieve the best possible results.
VELUX installation product system
- Flashings
Fit exact window dimensions and connect perfectly to your roofing material. Underfelt collar (type BFX) and insulation collar (BDX) are included with the flashing. - Underfelt collar
Pleated underfelt collar (type BFX) forms a tight seal between roof window and your felt underlay. Comes with adjustable drainage gutter to lead water away from the head of the roof window. - Insulation collar
Insulation collar (type BDX), with flexible foam for a tight and secure fit to the roof construction. - Vapour barrier collar
Vapour barrier collar (type BBX), including assembly tool for a vapour- and airtight solution. - Interior lining
Prefabricated linings (type LSB/LSC/LSD) for easy and airtight inside completion. Includes vapour barrier collar (type BBX).
Installation levels
VELUX roof windows offer two installation heights, standard or recessed.
Recessed flashings provide a sleek and streamlined finish as the roof window is installed 40mm deeper into the roof structure, meaning that less of the roof window protrudes above the roofline.
Standard installation
Single installation: EDW
Single installation: EDL
Combi Installation: EBL/EKL
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Single installation: EDT
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Single installation: EDP
Combi Installation: EBP/EKP
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Recessed installation
Single installation: EDJ
Combi installation: EKJ
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Single installation: EDN
Combi installation: EKN
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Combine VELUX roof windows with solar panels
The specially designed flashing system perfectly connects VELUX roof windows to in-roof solar panels from a variety of manufacturers. Our solution ensures that your roof window will fit perfectly into the solar panel grid with and easy safe and seamless integration. In this way, the roof is used optimally for generating solar energy while offering a comfortable living space with daylight and fresh air under the roof.
Flashing sets for a flawless installation
Our flashing sets contain everything you need for the best possible installation result.
Choose the Pro+ flashing set that includes the BDX insulation frame and BFX underfelt collar for a weatherproof installation and to reduce heat loss and thermal bridges.
Pro+ flashing set (2000 variant)
A flashing set with added insulation
Insulation frame BDX contributes to the reduction of heat loss and thermal bridges.
Available for single and combination installation.
Pro flashing set (1000 variant)
A flashing set for all weather conditions
Extra security against water penetration.
Available for single installation.
Insulation frame and underfelt collar
The insulation frame BDX insulates around the roof window frame, reducing heat loss and eliminating cold bridges. The combination of rigid and flexible foam ensures a tight, energy-efficient installation to the roof construction.
The flexible insulation frame can be compressed for quick installation.
The underfelt collar BFX ensures a perfect fit and watertight seal between the roof window, battens, and the roofing underfelt. It is easy to fit. Simply place on top of the roof window and unfold.
An adjustable and self-supporting drainage gutter is included in the BFX. This leads the water away from the head of the roof window if there is a leak above.
Vapour barrier collar
Use the VELUX vapour barrier collar BBX for a vapour and airtight installation that prevents condensation forming in the roof construction. The vapour barrier collar fits perfectly and can easily be mounted into the groove of the window.
Interior lining
If you want a ready-made solution to complete the interior finish in the room, VELUX linings are easy to install and there is no need for additional painting. Made from durable PVC material, VELUX linings are water-resistant and maintenance-free and fit perfectly with the roof window. The unique design allows space for extra insulation material to prevent cold bridges.
VELUX linings are delivered with VELUX vapour barrier collar BBX.
Combination of roof windows
The system consists of seven elements that enable your chosen combination.
The a-distance:
- EKN, EKJ: 100 mm (E)
- EKP, EKW, EKL: flexibility between 100-160 mm (M) with the new adjustable middle gutter
- Other frame distances between 60 mm to 400 mm can be specially ordered
The b-distance:
- Standard frame distance 100 mm (E)
- When installing a roller shutter, a frame distance of 250 mm (J) is needed
VELUX Adjustable middle gutter
Our innovative and patented solution makes roof window combination installations more straightforward.
The middle gutter can be adjusted to widths between 100 - 160 mm (M width), ensuring that it always fits to the actual rafter dimensions.
The VELUX Adjustable middle gutter is included in the VELUX Pro+ combination flashing set. When ordering, look for the letter M at the end of the product code – this means the VELUX Adjustable middle gutter, insulation collars and underfelt collars are included. For example: EKW MK06 2021M for a side-by-side combination.