Atrium Longlight/Ridgelight

Multiple rows of skylight modules that can be combined to create a large glass roof.

Suitable for:

  • Flat roof
  • Flat roofing material
  • Roof opening extra large
  • Rooflight installation pitch 5-40° 

Key benefits:

  • Ideal for construction of large, glazed roofs
  • Easy, fast and secure installation
  • Great design flexibility
Atrium longlight, Rooflight solution, VELUX Modular Skylights, DSV Headquarters, Hedehusene, Denmark
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Tools and guides

Products details

  • In short

    VELUX modular Longlight and Ridgelight solutions enable great daylight design in buildings with large, open atriums.

    The modular skylights enable fast and intuitive design when multiple rows are simply put together to cover the atrium – big or small.

    For maximum daylight, we recommend either mono-pitched Longlights installed at low angle or Ridgelights at 5° with beams.

    For optimum thermal comfort, we recommend Ridgelights 25-40° with venting modules.

    The rooflights are connected via drainage gutters and supported by structural beams. The beams also serve as support for the sub-construction used for mounting the skylight modules.

    VELUX modular skylights are delivered with a 10-year guarantee on modules and flashings.

    VELUX skylight specialists offer support throughout design, specification and installation, including design of structural beams and drainage gutters. Please note that beams, drainage gutters and sub-constructions are not included in the VELUX delivery.

    Illustration of Atrium Longlight solution

    Atrium Longlight solution


    Illustration of Atrium Ridgelight 25-40°

    Atrium Ridgelight solution at 25-40°


    Illustration of Atrium Ridgelight 5°

    Atrium Ridgelight solution at 5° with beams


  • Functions and sizes

    Kynar 500 – Baked Enamel

    Fixed skylight module

    1. Fixed skylight module 

    Motorized comfort venting skylight module

    2. Motorized comfort venting skylight module opens up to 410mm 

    Motorized smoke venting skylight module opens up to 700mm in less than 60 seconds

    3. Motorized smoke venting skylight module opens up to 700mm in less than 60 seconds 

    VELUX modular skylights require the following minimum and maximum measurements:

    1. Module width: 675-1000 mm
    2. Module height: 600-3000 mm 



    See size possibilities for fixed, comfort and smoke venting modules.
    Go to Size grid

    Warning triangle

    Venting skylight modules have a recommended minimum installation height of 2.5 m above floor level (inside) and ground level (outside).
    In case of installation below that level, safety measures must be applied by the installer/user to prevent serious injury.

  • Details
    VELUX modular skylight system is a turnkey solution comprising prefabricated skylight modules with dedicated claddings, flashings and vapour barrier connection strip to allow for design of watertight rooflight and glass roof structures.

    Comfort ventilation is possible via an integrated chain actuator that can be controlled with VELUX INTEGRA® system or with your preferred building management system. Smoke ventilation can only be controlled with your preferred building management system.

    For optimal daylight and heat control consider internal roller blinds that can be pre-mounted from the factory.
    Pre-fabricated VELUX Modular Skylights

    Pre-fabricated modular skylights from VELUX come with perfectly matching cladding, flashing and roller blinds. 

  • Glazing
    Get CAD/BIM objects for all major software platforms and find the right specification, product details and material information.
    Glazing units for VELUX modular skylights

    All glazing units come with step glass on the outer side to ensure water tightness (class E1200, EN 12208:2000).  

  • Performance

    The VELUX modular skylight profiles (sash and frame) are made of pultruded fiberglass (80%) and polyurethane composite (20%). The composite material provides high insulation performance and thermal stability as well as excellent profile stiffness and bending strength.  

    Due to the concept of prefabrication, we are able to test our products extensively against all thinkable hazards and stressful events. Tests are performed in controlled environments in accordance with harmonized standards for both Windows and doors and for Smoke and Heat control systems.
    Pre-fabricated VELUX modular skylights come with low energy glazing units to achieve low overall U-value

    In combination with low energy glazing units, the modular skyligths are able to achieve one of the lowest overall U-values for frame and glazing assembly in the skylight market (Uw values down to 0.86 W(m2/K)).  

  • Additional solutions

    Create a unique skylight solution

    By adapting the interior linings, the modular skylights can meet the demands of modern architecture featuring irregular or curved shapes, e.g. obtuse angles, acute angles or ovals.
    Atrium Longlight with adaptation of the internal lining

    Adaptation of the interior lining creates a slanting shape in an atrium solution made from multiple rows of Longlights.


    Atrium longlight with oval internal lining

    Adaptation of the interior lining creates an oval shape by means of rows of Longlights


    Asymmetrical solutions

    The great flexibility of VELUX Modular Skylights enables design of asymmetrical atrium solutions.
    Ridgelight and asymmetrical Ridgelight solutions combined, installed between roof sections of varying height.

    By combining Ridgelight modules of different heights, you can create an asymmetrical glass roof solution. The Ridgelight solution can be installed between roof sections of varying height. This solution is not a standard solution, project specific evaluation needed.

    Combining solutions

    Combining different types of modules creates beautiful solutions that optimize comfort and ventilation. Let us help you find the right solution for your next design idea.
    Illustration of atrium solution that combines different skylight types, Longlight, Ridgelight, Wall-mounted Longlight.

    Atrium solution that combines different skylight types (from left: two Longlights 5-30°, one Ridgelight 25-40°, two Longlights 5-30° and a Wall-mounted Longlight 5-45°).