Xtralite and Vitral are now a part of VELUX Commercial, and we are delighted to welcome you to our new website. Here, you will find our complete portfolio of daylight solutions and services for industrial, commercial and public buildings.

Size Options

Check out the size grids of prefabricated VELUX Modular Rooflights, which come in three variants: Monolight, Linearlight and Circularlight.

How to measure the modules 

The clear internal measure is determined by the interior dimensions of the 90° lining of the product: A (Length – slope direction) and B (Width)

Monolight

Clear internal measurement of monolight
Monolight/Linearlight

The clear internal measure of the product lining for monolight/linearlight
Linearlight
The clear internal measure of the product lining for linearlight
Clear Internal
A = Clear internal module length
B = Clear internal module width
There are different size options for Monolight, Linearlight and Circularlight, and you need to consider the following when choosing the correct size grid:

Monolight – Made-to-measure

Monolight – Made-to-measure size grid
Symbol explanation 

Color for fixed modules  Modular Rooflights - Fixed modules Fixed modules

Color for venting modules Modular Rooflights - venting modules double/triple glazing Venting modules – Double glazing

Color for venting modules-triple glazing  Modular Rooflights - venting modules double/triple glazing Venting modules – Triple glazing

Color for walk-on modules Modular Rooflights - Walk-on modules Walk-on modules

Linearlight - Made-to-measure

Linearlight – Made-to-measure size grid
Symbol explanation 

Color for fixed modules linearlight  Modular Rooflights - linearlight - fixed modules Fixed modules

Color for venting modules linearlight - double glazing Modular Rooflights - linearlight - venting modules - double glazing Venting modules – Double glazing

Color for venting modules linearlight - triple glazing  Modular Rooflights - linearlight - venting modules - triple glazing Venting modules – Triple glazing

Circularlight – Made-to-measure

Ø between 900 and 1350 mm depending on module type
Circularlight made to measure size grid
Symbol explanation 

Colour for modular rooflights - circular  Modular Rooflights - circular Circularlight modules - Sizes between: Ø 900 – 1350 mm

Product overview – features and limitations

Modular rooflight product overview – features and limitations
* Depends on snow and wind load - use static calculator