At Guardian Warm Roof UK, we specialise in the supply and installation of Stratus aluminium roof lanterns for homeowners and commercial property owners across the region. As Guardian certified installers, we bring advanced thermally efficient glazing solutions to your property that transform dark rooms into bright, welcoming spaces.
Over 60% of UK homeowners say increasing natural light is one of their top priorities when renovating or extending their property. We help you achieve exactly that with premium Stratus lantern systems that deliver outstanding performance alongside sleek contemporary looks.
Guardian is the brand leader in warm roofs and the only warm roof company to have Trustmark Scheme status. This recognition is a testament to both the independent testing that Guardian undertakes and the certified installer scheme it operates, giving you complete peace of mind.
We understand that there are cheaper warm roofs on the market, but Stratus represents the Rolls Royce of warm roof systems. When you choose us, you're investing in a high end lantern system that combines beautiful aesthetics with truly outstanding performance.


A Stratus roof lantern is a highly thermally efficient aluminium-framed system with a minimalist design and advanced insulation technology. Modern thermally broken aluminium roof lanterns can achieve U-values as low as 1.0 W/m²K or better, helping reduce heat loss compared to older glazed roof systems.
Stratus roof lanterns are engineered as a fully thermally broken aluminium system. The innovative thermally broken system features an ultra low conductive element that sits between the internal and external faces, dramatically reducing heat transfer.
Stratus roof lanterns provide excellent thermal performance, helping keep interiors cooler in summer and warmer in winter. With energy costs remaining a major concern for British households, thermal efficiency is now one of the most important considerations in glazing products.
The thermally broken system helps reduce heat transfer, supporting improved energy efficiency while keeping your heating bills low. Building Regulations in England require improved energy performance standards for extensions, meaning high-performance roof lantern systems are increasingly specified in new projects.


Stratus roof lanterns can be customised in bespoke RAL colours for both internal and external finishes. Whether you need a discreet black finish to complement modern architecture or a specific RAL colour to match existing window frames, we can supply and install systems built to your exact specifications.
Homes with high levels of natural light are consistently rated as more desirable by UK buyers, often helping properties sell faster. Due to their modern design and desirable features, Stratus roof lanterns can enhance overall property appeal.




