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.

Vario Therm

Energy-efficient barrel-vault rooflight ideal for industrial and commercial flat roofs

Suitable for:

  • Flat roofs and sloping flat roofs
  • Roof openings with widths of 1200mm to 11340mm and in any length
  • Roof pitches of up to 15° and ridges of sloped roofs

Key benefits:

  • Lightweight, prefabricated system with multiple configuration possibilities
  • Excellent thermal performance
  • Provides optimum illumination with diffused lighting
  • Great selection of comfort ventilation and certified smoke and heat exhaust systems
  • Wide choice of safety and protection systems
Multiple Vario Therm barrel vault with full flap and deflectors
See gallery

Related documents and links

Product details

  • In short
    Vario Therm is a barrel-vault continuous rooflight that offers energy efficiency and robust construction. It combines thermal insulation, protection and weathertight roof sealing with an attractive appearance, making it the perfect choice for projects with high architectural demands.
    With thermal decoupling and thermal insulation of the eaves area and kerb head, Vario Therm rooflights are able to achieve Uw-values as low as 1.02 W/m²K.
    They are ideal for both new-build and refurbishment projects where sustainability and energy efficiency are priorities, and guarantee optimum roof illumination with natural, diffused daylight.

    Multiple configuration possibilities are available, ensuring the right fit in every roof opening. In addition, a variety of accessories and features can be incorporated into the rooflight system, and the customised rooflights are prefabricated at our factory for easy and quick installation.

    • A wide range of glazing types fulfill thermal, photometric and other special requirements as needed.
    • Equipped with corresponding flap systems and opening devices, the Vario Therm rooflight can be optimally used for comfort ventilation as well as smoke and heat exhaust ventilation (SHEV).
    • Fall-through protection systems ensure maximum safety during installation and when maintenance work is being carried out. Options range from lightweight systems that can be retrofit to existing rooflights, through to up to extremely robust multifunctional systems.
    • Other accessories include adjustable upstands, secure roof membrane connections and intelligent building management systems.

    Vario Therm variants

    Vario Therm

    Illustration of a Vario Norm barrel vault rooflight with two full flaps and deflectors

    Vario Therm with ventilation flaps

  • Product features
    Vario Therm continuous rooflights feature a high-quality and robust construction with excellent thermal efficiency. The innovative composite profile comprises a rigid PVC multi-chamber insulation structure and aluminium cover profiles.
    This, combined with the thermal-insulating kerb system and the kerb connection profile, ensures optimal isothermal characteristics and minimal heat loss.
    • Available in widths of 1200mm to 11340mm, and in any length.
    • U-values as low as Uw=1.02 W/m²K.
    • Great selection of accessories, including adjustable upstands, connection. systems and insect protection.
    • European Technical assessment (ETA)-16/07 10.
    • Smoke and heat exhaust tested according to DIN EN 12101-2.
    • Meltable and can therefore be calculated as a heat exhaust surface in accordance with DIN 18230.
    • Structural dimensioning according to Eurocode.
  • Glazing performance
    Vario Therm has an extensive selection of glazing types and thickness in opal or clear polycarbonate with the following features:
    • Ug-values from 1.82 to 1.16 W/m²K
    • Light transmission from 80% to 15%
    • Airborne sound insulation up to 27 dB
    • Specialist glazing for specific needs: IR-control for lower heat input, Broof (t1) for resistance to external fire exposure or hail protection
    : Illustration of a glazing example with opal polycarbonate

    Glazing example, opal polycarbonate

    Illustration of a glazing example with clear polycarbonate

    Glazing example, clear polycarbonate

  • Comfort ventilation and SHEV
    Equipped with corresponding flaps and opening devices, Vario Therm continuous rooflights can be used to provide effective smoke and heat exhaust, as well as daily comfort ventilation.
    • A variety of rooflight flap types and sizes enable the right fit and performance for each individual project. Link to flap systems overview scroll page
    • Our certified SHEV systems guarantee the highest level of protection in the event of fire; tested according to DIN 12101-2
    • Smartcontrol is an optional intelligent building managment system that facilitates the comfortable and safe control of all SHEV and ventilation systems.
    Explore our certified smoke and heat exhaust and comfort ventilation solutions
    Illustration of a continuous rooflight with ventilation flap and air flow

    Ventilation flap

  • Safety Systems
    Functional fall-through protection systems ensure safety during installation and maintenance work on the roof.
    Explore our variety of safety systems, which range from a lightweight, filligree steel safety grid through to extremely robust multi-functional constructions that provide safety and sun protection.
    The systems come pre-assembled in our factory or can be retrofit to an existing structure.
    Rooflight safety and fall-through protection grid system for continuous rooflights

    Fall-through protection grid system