Longlight 5-30°

A mono-pitched solution ideal for flat roofs

Suitable for:

  • Flat and sloped roof
  • Flat roofing material
  • Opening width in roof min./max. 0.6-3.1 m (for venting modules 0.8-2.5 m)
  • Rooflight installation pitch 5-30° 

Key benefits:

  • Subtle expression thanks to low pitch design
  • Adding daylight to hallways, corridors and large rooms
  • Great value-for-money due to fast and hassle-free installation
Rooflight solution with Longlight 5-25˚ modules and opal glazing, Trumpington Community College, Cambridge, Great Britain
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Tools and guides

Products details

  • In short

    A Longlight solution is a single row of modules that lights up hallways, corridors and large rooms with natural daylight. Multiple rows of Longlights form an ideal glass roof for large open areas, e.g. atriums. 
    Install the Longlights to follow the interior floor plan to optimise daylight and ventilation in every corner of the room.

    The modular Longlights allow fast and easy closure of the roof to reduce cost and speed up the interior works.

    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 the sub-construction needed for installation. 
    Please note that sub-constructions are not included in the VELUX delivery.

    Learn more about sub-constructions

    Illustration of Longlight solution - VELUX modular skylights

    Longlight solution

    Longlight solution installed in flat roof with sub-construction.

    Longlight solution installed in flat roof with sub-construction. 

    Longlight solution installed in sloped roof with sub-construction.

    Longlight solution installed in sloped roof with sub-construction

  • 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. Actuator chain stroke 260 mm.

    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.  

    Adaptation of the interior lining creates a parallelogram

See case studies with Longlight solutions