Lamilux has been in the skylight business since 1955 and has built a reputation over that time for integrity and service in the industry. Lamilux skylights continue to set the standard thermal performance and design flexibility, providing occupants with more opportunities to bring natural light into their home without compromising interior comfort. On account of their commitment to innovation, durability, and energy efficiency, Lamilux has become one of the most trusted names within the high-performance building and Passive House communities. Their skylights are available throughout the United States and Canada thanks to their partnership with 475 High Performance Building Supply (475.Supply).

One of Lamilux’s staples, the Lamilux FE unit skylight, is a flat roof window available through 475.Supply. The unit boasts a range of glazing types that can affect light transmittance, energy permeability, and performance. While the double-pane model provides excellent performance, with a Ug value of approximately 1.1 W/(m²K) [0.19 BTU/h·ft²·°F], the performance of the triple-pane model is truly exceptional. It achieves a Ug value of approximately 0.6 W/(m²K) [0.11 BTU/h·ft²·°F] and is compliant for Passive House in cool, temperate climates. Comparable models include the FE 3° and the FE Circular.  

The Lamilux FE also has some of the most flawless isothermal lines you’ll ever see, which makes it ideal for a variety of Passive House projects, especially in homes with limited daylighting options due to party walls or other restrictions. The meticulous engineering and thermo-active design that has gone into creating the Lamilux FE ensures homes that are naturally lit without sacrifices in performance. 

Here’s how.

#1 - Insulated Glazing Units

Even in the most well-constructed building, glazing is the weakest link in the enclosure. To provide reinforcement, high-performance and Passive House buildings rely on insulated glazing units. IGUs consist of not only multiple panes of glass (typically three in Passive House construction), but also argon gas inserted between panes; and warm-edge spacers to minimize heat transfer at the edge of each pane to reduce thermal bridging. 

As a result of their improved insulating power, IGUs make homes more efficient and more comfortable.

#2 - Continuous Insulation 

The frame of the Lamilux FE is equally robust. Composed of extruded aluminum and filled with foam insulation, the frame maintains consistent thermal resistance. This detail is essential for keeping homes cozy in the winter months and comfortably cool in summer.

On account of the continuous layer of insulation and the thermal bridge-free detailing, the curb of the Lamilux FE has a U-value of <0.9 W/(m²K) [0.16 BTU/h·ft²·°F].

Flexible Sizing, Control, and Glazing Options

In the immortal words of Ron Popeil, “But wait, there’s more!”

In addition to having exceptional performance because of its world-class engineering and patented thermo-active design, Lamilux FE skylights are also available in both standard and custom sizes. Standard sizes come with the insulated curbs, while custom versions can be mounted to site-built curbs. A full list of standard sizes can be found here. Standard and custom sizes can run up to approximately 9’ in length and nearly 80” in width.

The Lamilux FE can be fixed or operable, with manual or motorized venting, sloped or circular geometries, as well as exit hatch configurations for roof access. 475.Supply also offers motorized exterior blinds and interior shading systems for added daylight and heat control. These can be ideal in locations where occupants want to maximize solar heat gains in the winter and avoid the gains in summer. For hotter climates where heat gains are rarely desired, skylights can be equipped with low emissivity coatings to reduce light transmittance and solar heat gains.

Built for the Demands of High-Performance Construction

In a crowded marketplace of skylight options, Lamilux stands out by refusing to cut corners when it comes to performance and long-term durability. Additionally, Lamilux provides owners, architects, and builders with numerous opportunities for customization to support comfort, energy efficiency, and design freedom.