Installation solutions

Every roof installation job requires skill and experience as well as the right tools and materials. The VELUX installation process is designed and optimised to support your workflow so you can achieve the best possible results.

Installation solutions

Every roof installation job requires skill and experience as well as the right tools and materials. The VELUX installation process is designed and optimised to support your workflow so you can achieve the best possible results.

Installation products and flashings

For long lasting performance from your roof windows, always use the VELUX installation products. VELUX installation products make it easy to install roof windows quickly and efficiently and protect against the risk of water penetration, mould and condensation for durability. What's more, just like other VELUX products, our installation products meet the same exacting standards of quality so your customers can enjoy their roof windows for generations to come.

  • Fit exact window dimensions and connect perfectly to your roofing material. Underfelt collar (type BFX) and insulation collar (BDX) are included with the flashing.

  • 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 (type BDX), with flexible foam for a tight and secure fit to the roof construction.

  • Vapour barrier collar (type BBX), including assembly tool for a vapour- and airtight solution.

  • Prefabricated linings (type LSB/LSC/LSD) for easy and airtight inside completion. Includes vapour barrier collar (type BBX).

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Original VELUX
Flashings
 Underfelt collar BFX
 Water drainage
gutter
 Insulation frame
BDX
 Vapour barrier
collar BBX
 Interior lining
LSB / LSC / LSD
 Lining frame
kit LSG
Fit exact window
dimensions and
connect perfectly
to your roofing material
 Pleated underfelt
collar forms a
tight seal between
roofwindow and
your felt underlay.
 Self-supporting
drainage gutter
ensures safe
water drainage
from above the
window.
 Insulation frame
with flexible foam for a tight and secure fit to the roof construction.
 Vapour barrier
collar, including assembly tool for a vapour- and airtight solution.
 Prefabricated linings
for easy and airtight inside completion. Includes vapour
barrier collar.
 Easy-to-assem­ble,
adjustable steel
frame for fast and
easy framing for
your on-site lining. Includes vapour
barrier collar.
 

Standard or recessed installation

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. For optimum energy efficiency, we recommend installation with insulation collar BDX and underfelt collar BFX included in the Pro+ flashing sets.

Roof window installed on a pitched roof
 Standard installation
Roof window installed recessed on a pitched roof
 Recessed installation

Standard installation

Flashings on a window installed on a roof

Single installation: EDW
Combi installation: EBW/EKW

  • For standard installation of roof windows in flat or profiled roofing material up to 120mm in profile
  • Also for interlocking slate, thatch and profiled sheeting
  • Suitable for 15°-90° roof pitches
Flashings on a window installed on a roof

Single installation: EDL
Combi Installation: EBL/EKL

  • For standard installation of roof windows into slate up to 8mm thick
  • Not for interlocking slate
  • Suitable for 15°-90° roof pitches

Single installation: EDT
Combi Installation: EKT

  • For standard installation of roof windows in slate with 15-40mm thickness
  • Suitable for 15°-90° roof pitches

Single installation: EDQ
Combi installation: EKQ

  • For standard installation of roof windows in click metal roofs with standing seams between 25-40mm
  • Suitable for 15°-90° roof pitches

Recessed installation

Flashings on a window installed on a roof

Single installation: EDJ
Combi installation: EKJ

  • For recessed installation of roof windows into flat or profiled roofing material up to 90mm in profile
  • Suitable for 20°-90°


Flashings on a window installed on a roof

Single installation: EDN
Combi installation: EKN

  • For recessed installation into slate up to 8mm thick
  • Not for interlocking slate
  • Suitable for 20°-90° roof pitches

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.

Extra insulation and protection

Craftsman installing a window frame on a pitched roof
Insulation collar.
Craftsman installing a window on a pitched roof
Pleated underfelt collar.

Our flashing sets contain everything you need for the best possible installation result. Choose the Pro flashing set that includes the BFX underfoot collar for a weather proof installation. Or if you want added insulation, choose the Pro+ flashing set that also includes the BDX insulation collar.

Pro+ flashing set

An upgraded flashing set with added insulation for reduction of heat loss and cold bridges. Including insulation collar BDX and underfelt collar BFX with drainage gutter.

Vapour and airtight installation

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.

Excellent interior finish

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.