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Ridgelight 25-40°

A dual pitched rooflight for installation on a flat roof or at a roof apex.

Suitable for:

  • Flat roof and at the top of a sloped roof
  • Flat roofing material
  • Opening width in roof min./max 1.1-4.5 m (for venting modules 1.4-4.5 m)
  • Rooflight installation pitch 25-40° 

Key benefits:

  • Ensures maximum daylight and thermal comfort
  • Adds spaciousness to the area below
  • Totally self-supporting solution
Rooflight solution with Ridgelight 25-40˚ modules, De Assenburg Shopping Mall, Bemmel, The Netherlands
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Tools and guides

Products details

  • In short

    Ridgelight 25-40° is a classic rooflight solution, where two rows of Modular Skylights are connected at the ridge. The dual pitched Ridgelight solution is ideal for buildings with large roof openings.

    Ridgelight 25-40° with venting skylight modules on both sides is an optimal solution for buildings that require day or night cooling.

    The Ridgelights can be supplied with different types of glazing on each side to control heat and glare according to the orientation of the building.

    Optional gable modules can be supplied with different types of glass or infill panels, depending on the visual expression you want to achieve with the installation.

    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 the sub-construction needed for installation. 

    Learn more about sub-constructions

    View an interactive 3D cross section of the Modular Skylight solution.

    Illustration of Ridgelight - a VELUX Modular Skylight solution

    Ridgelight solution in 25-40°

    Modular Skylights Ridgelight with glass gable

    Ridgelight with glass gable

  • Functions and sizes

    Modular Skylights are available in a wide range of standard sizes and functionalities:

    Fixed skylight module

    1. Fixed skylight module 

    Motorized comfort venting skylight module

    2. Motorized comfort venting skylight module.
    Actuator chain stroke 260 mm.

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

    3. Motorized smoke venting skylight module.
    Actuator chain stroke up to 700 mm, which opens in less than 60 seconds.

    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

    VELUX comfort venting Modular Skylights meet the requirements of the harmonised standard EN 60335-2-103 (2015). Therefore, comfort venting skylights can be installed within reach, i.e. at installation heights below 2.5 m above floor level (inside) and ground level (outside). We recommend that you observe national regulations and consider if the planned specific use of the building requires additional safety measures that must be applied by the installer/user to prevent serious injury. For more details and information on smoke venting Modular Skylights, please refer to the Technical Handbook and the safety guidelines delivered with each product. If VELUX roller blinds are installed, please observe recommendations.

  • Details

    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.

    View an interactive 3D sample of the Modular Skylight system.

    Pre-fabricated VELUX Modular Skylights

    Prefabricated Modular Skylights from VELUX come with perfectly matching cladding, flashing and roller blinds. 

  • Glazing

    Modular Skylights come with standard low-energy double or triple glazing with the following features: 

    • Insulated glazing (Ug values down to 0.5 W/m²K)
    • Toughened outer glass
    • Laminated inner safety glass
    • Falling through safety
    • Sound insulation (traffic, rain and hail)
    • Warm edge spacer (protects insulation properties over time and minimizes the risk of condensation at pane edges)
    • Step pane (leads water off the unit)
    • Sun protection coating (optional)
    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 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 rooflight solution to match your design

    By adapting the interior lining, modular Ridgelights 25-40° can be used in non-square designs, e.g. obtuse angles, acute angles or ovals. By using adapted linings, the modular skylights meet the demands of modern architecture featuring irregular or curved shapes.  
    Illustration of a Ridgelight solution with shaped, oval lining.

    Shaped solution with oval lining.

    Create an asymmetrical solution

    Modules of different heights can be combined to form an asymmetrical Ridgelight solution that bridges roof sections of different height and slope. Using glazing with different characteristics on each side of the Ridgelight help maximize daylight and minimize heat intake.
    Illustration of an asymmetrical Ridgelight solution for roof sections of different heights.

    Asymmetrical Ridgelight for roof sections of different heights


See case studies with Ridgelight solutions