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Energy efficient mono and dual pitched rooflights ideal for flat roof buildings; particularly suitable for refurbishment projects

Vario Therm S

Key benefits:

  • Lightweight system with excellent thermal performance
  • A variety of glazing slopes, allowing for versatile design options
  • Wide range of accessories, including comfort ventilation, certified smoke and heat exhaust systems and safety systems
Retail store interior with customers and checkout counters, high ceiling and visible rafters.
Retail store interior illuminated by Vario Therm S continuous rooflights

In short

Vario Therm-S is an energy-efficient continuous rooflight that meets the highest expectations of functionality and aesthetic design. These rooflights are ideal for energy efficiency related refurbishments due to their design flexibility, light weight and excellent total heat transmission (with Uw-values as low as 1.1 W/m²K).

  • Various glazing slopes enable versatile design
  • Thermal decoupling and thermal insulation of the eaves area and the kerb head minimise heat loss
  • A great selection of glazing types fulfill thermal, photometric and other special requirements as needed
  • Equipped with the corresponding flap system and devices, the Vario Therm S rooflight can be used for comfort ventilation and can serve as smoke and heat exhaust ventilation (SHEV)
  • Three types of fall-through protection ensure maximum safety during installation and maintenance work on the roof
  • Accessories such as adjustable upstands, secure roof membrane connections and intelligent building management systems make it easy to configure the rooflights to meet specific project requirements
  • Ideal for implementing with solar photovoltaic systems
Sleek skylight with angled glass panels and metal frame.
Mono-pitched Vario Therm S

Product features

Vario Therm S rooflights have a high-quality construction comprising the innovative composite profile with a rigid PVC multi-chamber insulation structure and aluminium cover profiles. The result is a robust system with excellent thermal performance and plenty of design flexibility.

  • Mono- and dual-pitched rooflight solutions
  • Standard dual-pitched solutions: 30°/30°, 45°/45°, 30°/60° (shed-type), custom solution upon request
  • Mono-pitched rooflight solutions with custom glazing slope, upon request
  • Available in widths of 1.00 to 6.00 m, and in any length
  • U-values down to Uw=1.1 W/m²K
  • European Technical Assessment (ETA)-17/0770
  • Environmental product declaration Type II according to EN ISO 14021
  • Additional structural support for high wind and snow load areas
  • Load transfer of snow load up to 12 kN
  • Load transfer of peak velocity pressure up to 4.88 kN
  • Smoke and heat exhaust tested according to DIN EN 12101-2
  • Structural dimensioning according to Eurocode
  • Great selection of accessories, including adjustable upstands, connection systems and intelligent building controls

Further product details

PVC blue glass sample
Glazing example, clear polycarbonate

Glazing performance

Vario Therm S has a variety of glazing types.

Comfort ventilation and SHEV

Equipped with single flaps (EKS) and corresponding opening devices, the Vario Therm S rooflights are suitable for daily comfort ventilation and can also provide effective smoke and heat exhaust ventilation.
Professional performing roof maintenance with specialized tools.
Vario safety grid

Safety systems

Explore our variety of safety systems, which range from a lightweight, filligree steel safety net through to extremely robust multi-functional constructions that provide safety and sun protection.
Other solutions in this product group
Flat roof with skylights, modern design and natural light.
Vario Norm
Flat roof with VELUX roof windows, modern design and natural light.
Vario Therm
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Frequently asked questions

What is Vario Therm S?

Vario Therm-S is an energy-efficient continuous rooflight that meets the highest standards of functionality and aesthetic design. Thanks to their design flexibility, low weight and excellent overall thermal transmittance (with Uw values of up to 1.1 W/m²K), these rooflights are ideal for energy-efficient refurbishments. They can be configured as mono- or dual-pitched rooflights, creating a more defined, architectural appearance.

What roof configurations can Vario Therm S accommodate?

Vario Therm S is available in mono-pitch and dual-pitch variants, allowing designers to match the form of the roof or introduce visual rhythm to large roofscapes. The system’s modular design supports integration on both flat and low-slope roofs, and can be tailored to various building geometries.

Is Vario Therm S suitable for refurbishment projects?

Yes. Vario Therm S is often chosen for refurbishment and upgrade projects, especially when replacing outdated rooflights with a more energy-efficient and visually refined system. Its flexible sizing and made-to-measure manufacturing allow installation on existing upstands or adapted roof structures with minimal disruption.

What thermal and daylight performance can be expected from Vario Therm S?

Vario Therm S combines multiwall polycarbonate glazing with thermally broken aluminium profiles to achieve excellent insulation values (typically around Uw 1.1–1.3 W/m²K, depending on configuration). Its pitched design improves natural daylight penetration and helps shed water and debris, reducing maintenance over time.

Can Vario Therm S incorporate opening elements or SHEV functionality?

Yes. Like other Vario systems, Therm S can be fitted with ventilation or smoke exhaust flaps certified under EN 12101-2, offering flexibility for comfort ventilation or safety compliance. The pitched design allows flaps to integrate seamlessly into the rooflight structure without disrupting the overall appearance.

Does Vario Therm S come with fall protection or safety options?

Yes. Optional integrated fall-through protection systems such as safety meshes or guard grids can be specified. These solutions comply with relevant safety standards and ensure that roof maintenance can be carried out safely.