Developed in collaboration with Foster + Partners, VELUX Modular Skylights were created to address the challenges of delivering consistent daylight in commercial buildings. The result is a prefabricated skylight system that combines architectural design with engineered performance, helping simplify specification while improving overall project outcomes.
This guide covers the key questions architects, specifiers, and contractors ask when evaluating these skylight systems for their daylighting projects.
The VELUX Modular Skylight System (VMS) is a metal-framed daylighting solution, configured from the same standard prefabricated module. Unlike traditional skylights, which are typically designed as one-off solutions with varying sizes, this modular approach allows the same unit to be repeated and combined across the design, creating a scalable and consistent approach to specification and installation.
Learn More: View Modular Skylight System Brochure
Yes, VELUX Modular Skylights can be specified with integrated ventilation modules, allowing for natural airflow directly through the skylight system. When designing with venting in mind, it’s typically recommended that at least 3% of the total modules be ventilated, helping to support effective air exchange and indoor comfort. Additionally, venting modules must alternate with fixed modules and cannot be installed side by side (i.e., fixed, venting, fixed, venting rather than fixed, fixed, venting, venting).
These skylight configurations can also be equipped with rain and wind sensors to ensure the venting modules close in the event of strong winds or rain.
Modules are pre-wired with a 24VDC line in a panel under the flashing. The low-voltage line can be wired to a switch or integrated into a control system, as designed by your engineer. You can request an electrical wiring diagram from VELUX Commercial for use by your electrical engineer and/or contractor.
VELUX Modular Skylights offer a streamlined, high-performance solution from design through installation. Key benefits include:
Because they scale easily and adapt to different roof types and geometries, our modular skylight systems perform well in a wide range of commercial applications. They’re most commonly used in:
To learn more about how our modular skylights performed in real-world projects, we recommend browsing our case studies.
Related: Explore Application Brochures
VELUX Modular Skylights are built using high-performance composite structural profiles, made from approximately 80% fiberglass and 20% polyurethane. It delivers excellent thermal stability and insulation, helping reduce heat transfer while maintaining consistent performance over time.
At the same time, its high structural strength supports large-span installations without adding unnecessary weight or complexity. Because of this composition, the system is also inherently non-corrosive, electrically non-conductive, and virtually maintenance-free. This makes them well-suited for long-term performance in demanding commercial environments.
The modular system is available in 8 configurations, including:
There are two main VELUX Modular Skylight configurations that fall into the single-pitch category: the Longlight Series, designed for roof pitches from 5° to 25°, and the Northlight Series, designed for pitches from 25° to 90°.
The Step Down Series and Longlight Atrium Series (5°–25°) can also be used in single-pitch configurations. As always, be sure to review the pre-engineered flashing design to ensure it aligns with your project requirements.
Each configuration has specific performance characteristics based on factors such as building orientation, roof conditions, module type and layout, span requirements, and desired daylight and ventilation performance.
One option is to use the Daylight Visualizer to simulate and quantify how natural light will perform within your space before installation. This allows you to compare different configurations and make more informed decisions based on real data. For more information or guidance on selecting the right solution, contact our team.
Yes, our modular skylight configurations are an ideal solution for replacement projects. Given their design flexibility and different configurations, they are a versatile solution for both new construction and retrofit projects.
Find out more about building considerations for commercial skylight renovations in our downloadable guide.
The installation process for modular skylights is designed to be three times faster and more predictable than traditional, site-built skylight systems. Because the system is prefabricated and factory-assembled, much of the complexity is removed from the job site.
Each module is delivered ready for installation, reducing the need for field fabrication and minimizing installation time.
The process typically follows a few key steps:
Watch this video to learn more about the installation process from an experienced installer and why they prefer the modular approach.
The thickness of the curb/sub construction should be 8 -1/4" in order to accommodate the selected attachment method and to cloak the condensation gutters. Visit our website for more detailed information on sub-construction and installation instructions for each configuration.
Standard VMS solutions do not require the structural reinforcement of an I-beam. An I-beam would be needed in solutions requiring additional support due to the weight and/or thrust of the modules, such as low-slope designs, atriums, and step configurations. I-beams are not included in the VMS system and will need to be sourced separately after review by a Structural Engineer. For more information, contact us.
VELUX Modular Skylights are protected by our industry-leading 10-year warranty, giving you and your customers confidence in long-term performance and reliability. This warranty covers key components of the system and helps protect against defects in materials and manufacturing when installed in accordance with VELUX guidelines. For full details on coverage, limitations, and specific terms, we recommend reviewing the complete warranty documentation.
Costs vary depending on the system size, glazing specifications, and any integrated features, such as ventilation or roller blinds. For pricing information, contact our commercial team, and we can provide a quote for your project.
If you think VELUX Modular Skylights are a great fit for your design needs, we have a full suite of technical resources, including CAD files, BIM models, and detailed specifications, that you can easily access to get started with your design process.