Laminated Glass Basement Skylights with Argon-Filled Sealed Units – Kensington, London

What type of glass is used for these basement skylights?

These basement skylights are manufactured using multi-laminated safety glass formed into sealed double-glazed units. Laminated glass is essential for overhead and walk-on applications, as it remains bonded if damaged, providing enhanced safety and security.

Why are sealed units specified instead of single glazing?

Sealed units significantly improve thermal performance. By using a double-glazed construction with an insulated cavity, heat loss is reduced and internal comfort within the basement space is improved throughout the year.

What is the benefit of argon gas within the sealed unit?

Argon gas enhances insulation by slowing heat transfer between the glass panes. This improves energy efficiency, reduces cold spots, and helps minimise condensation on the internal glass surfaces.

Why are warm edge spacers important?

Warm edge spacers reduce thermal bridging around the perimeter of the glass unit. This improves U-values, lowers the risk of condensation, and extends the lifespan of the sealed unit compared to traditional aluminium spacers.

What role does solar control glass play?

Solar control glass limits excessive heat gain while still allowing high levels of natural daylight into the basement below. This helps prevent overheating and glare, particularly during warmer months, while maintaining a bright and usable space.

How are the glass panels supported?

The sealed glass units are precision fitted into bespoke steel frames. Steel framing provides long-term structural strength while maintaining slim sightlines that complement the surrounding stone paving and architectural detailing.

Why is black silicone used around the glass perimeter?

A black silicone smear-and-seal border creates a flexible, watertight seal between the glass and steel frame. It protects the sealed unit edges, accommodates movement, prevents water ingress, and visually conceals the spacer edge for a clean, framed finish.

Is this type of skylight suitable for external, walk-on areas?

Yes. The combination of laminated glass, sealed unit construction, steel framing, and external-grade silicone sealing makes this system ideal for exterior basement skylights exposed to foot traffic, weather, and temperature changes.

How do these skylights improve basement spaces?

By introducing natural light, improving thermal efficiency, and maintaining high safety standards, these bespoke skylights transform lower-ground areas into bright, functional living spaces.

Installed at a private residence in Kensington, London, this project demonstrates a high-performance basement glazing solution that balances safety, efficiency, and refined architectural design.