Vertical Bi-Lite

Keylite Vertical Bi-Lite (VBL) Roof Windows are the ideal way to maximise the light and ventilation into any room.

Keylite VBL roof windows are available in a variety of styles and combinations. Arranging your Keylite Roof Windows to incorporate a Keylite VBL creates a larger glazed area, and increases light into your living area.

The roof and vertical windows combine seamlessly at eaves level.

For “tilt and turn” prices and options, contact the Keylite Sales Team.

The standard vertical windows are available as tilt only.

Keylite VBL’s are designed to complement the Keylite Roof Windows overhead, and are suited to any property.


Year Guarantee

Expanding Thermal Collar

Just pull the tapes and the foam expands to fill the gap between the window and the roof timbers

View Futuretherm

All Weather Ventilation

Keylite Roof Windows all provide trickle ventilation, even with the window fully closed and securely locked.

Ventilation Filter

The built-in insect filter ensures only clean, fresh air passes into the room.

Easy Installation

Simple, Easy.. Fast. From box to roof in 2 minutes. Keylite innovations combine for faster, easier installation.

Installation Video



All our roof windows are recessed for an in roof look.


All our roof windows are recessed for an in roof look.

Roof Window Sizes

Single Double Triple
(nominal)(WxH) mm 780mm Wide 1570mm Wide 2370mm Wide
Pine Finish
H = 600mm tilt only VBL-780X600-T DVBL-780X600-T TVBL-780X600-T
H = 950mm tilt only VBL-780X950-T DVBL-780X950-T TVBL-780X950-T
H = 950mm tilt+turn VBL-780X950-TT DVBL-780X950-TT TVBL-780X950-TT
White Finish
H = 600mm tilt only WF-VBL-780X600-T WF-DVBL-780X600-T WF-TVBL-780X600-T
H = 950mm tilt only WF-VBL-780X950-T WF-DVBL-780X950-T WF-TVBL-780X950-T
H = 950mm tilt+turn WF-VBL-780X950-TT WF-DVBL-780X950-TT WF-TVBL-780X950-TT

Optional Upgrades

White Finish

A fresh and contemporary look. The wipe clean moisture resistant finish is ideal for use in kitchens, bathrooms and other humid areas.

Electric Operation

Electric Operation Fingertip control for out of reach locations.

Integral Blind

The clever built in shading solution with the blind enclosed between the glass and therefore is protected from moisture, dust or damage.

Roof Windows

Designed to complement both renovation & new build projects in a traditional style. It is ideal for use in a period style property.

Window Options

Create the perfect solution for your project – Combi, Bi-Lite or Grid.

Installation Components

Felt and Vapour Collars available.

Smoke Vent

Designed to open automatically in the event of a fire.

Keylite Blinds

Choose easy fitting Keylite Blinds to control light and privacy in your home.

Why Keylite?

Visit our Why Keylite? Page

Service & Support

Service & Support

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

Service & Support

Patented Innovation

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

Service & Support

10 Year Guarantee

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

Service & Support

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Only available in
England, Scotland & Wales