Dormer System

How to install a Keylite Dormer System

Dormer Apex


The Keylite Dormer System opens up the opportunity for a unique fresh air experience with the convenience of the top handle on our Centre Pivot Windows, allowing easy opening to create a well ventilated and bright space.

Available in a configuration of 4 or 6 windows, the Keylite Dormer can be made even more practical with the selection of Electric or Solar powered options for maximum fingertip control.



  • Fully insulated Keylite Dormer frame work.
  • All associated aluminium flashing components required to complete the installation.
  • Colour matched internal decorative trims.

Note: The Keylite Dormer Kit refers only to the frame work, flashings and decorative trims. For complete system, the Roof Windows must be specified seperately. For further information, please contact the Keylite Technical Team.

How to install a Keylite Dormer System

Follow these steps when choosing a Keylite Dormer System:


Decide if the system you require is a configuration of 4 or 6 roof windows. Special consideration should be given to structural opening sizes.

Note: Check with your local Building Control Department prior to installation.


Window Sizes 05, 07C or 0835-70 roof pitch

Window Sizes 04, 07B or 08B40-70 roof pitch


Select your Centre Pivot roof windows in size 05, 07C or 08. Choose from:

  • PVC, Pine or White Finish.
  • Glazing options (Hi-Therm Recommended).
  • Integral Blind.

For optimum use, Keylite recommends Solar or Electrically operated Centre Pivot roof windows.

Note: Roof windows are to be costed separately.

Finish Options

Choose the perfect finish for your Keylite Roof Window. Our Roof Windows come in three different finishes: Polar White PVC, White Painted Pine or Clear Lacquered Pine.

Polar White
Our brilliant white PVC profile

Our white PVC profile is exceptionally moisture resistant and is therefore ideal as a maintenance-free solution for every room in the house, including kitchens or bathrooms. Choose Polar for a bright, white, hassle free solution throughout the home.
  • 20 Year Guarantee – Centre Pivot only
  • Premium grade PVC materials
  • Moisture Resistant
  • Maintenance Free
  • Energy Efficient

White Painted
Our White Painted roof window is painted with a clean coat of white paint

Our White Painted roof window is painted with a clean coat of white paint, giving it a moisture resistant property. Choose White Painted for a contemporary style which looks great in every room.
  • 10 Year Guarantee
  • Timber with a clean coat of white paint
  • Ideal for kitchens and bathrooms
  • Low Maintenance

Pine Clear
Our standard Pine Finish enhances the natural beauty of the wood

Our standard Pine Finish enhances the natural beauty of the wood, with a hard wearing, clear, satin lacquer applied in multiple coats. Choose Pine for a traditional look or to compliment internal timber features.
  • 10 Year Guarantee
  • Timber with clear satin lacquer applied in multiple coats
  • Ideal for most interiors
  • Practical and Hard-wearing
Size Code DRX4 04 DRX4 05 DRX4 07B DRX4 07C DRX4 08B DRX4 08 DRX6 04 DRX6 05
Individual Roof Window Size WxH(mm) 780x980 780x1180 940x980 940x1180 1140x980 1140x1180 780x980 780x1180
Structural Opening Size WxH(mm) 1550x2095 1550x2470 1870x2095 1870x2470 2270x2095 2270x2470 2350x2095 2350x2470

Service & Support

Our technical experts are on hand to advise and assist you at the design and specification stage.

Patented Innovation

Our patents mean that other conventional roof windows do not share many of our extraordinary features.

Up to 20 Year Guarantee*

We are confident that our products will give trouble free performance throughout this period and beyond. *See Guarantee terms

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Available in
Great Britain, Northern Ireland & Republic of Ireland

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