January, being one of the darkest months of the year, often highlights areas that lack natural lighting. Periods of lower light can expose a building’s ageing window systems -their bulky frames and minimal glazing limit the amount of light that can be taken advantage of.
We offer the perfect solution: slimline aluminium windows. A modern alternative that maximises visible glass while maintaining the structural integrity and performance your building requires.
At BDC Aluminium, we provide high-quality, specification-led aluminium systems, ideal for modern and contemporary projects.

Why Slim Aluminium Frames Outperform uPVC
The word ‘sightline’ describes the visible frame area around a glazing unit. In an ideal world, when attempting to take in as much natural light as possible, your building’s windows would have smaller sightlines and greater glazed areas.
The superior strength of the aluminium we use in all our windows allows for much slimmer sightlines than typical fenestration, like uPVC. These sightlines are importantly achieved without compromising on the strength and stability of the window itself.
With BDC Aluminium’s window systems, you can achieve cleaner aesthetics, larger glazing panels and increased design flexibility over alternative options.
Daylight Harvesting
The term ‘daylight harvesting’ refers to the purposeful design of buildings to make optimal use of natural light and reduce reliance on artificial lighting. We’ve found over the years that this is becoming more important to businesses, specifiers and installers.
Smart’s Alitherm 300 and 400 systems are engineered with this in mind. They maximise glazed areas while maintaining the structural performance modern buildings require.
They support the overall design and aesthetics of a building while improving internal natural light levels and efficiency.
Thermal Efficiency Meets Aesthetics
Traditional systems and older windows can contribute to heat loss, cold bridging and discomfort inside. It’s important to your building’s performance that you evaluate existing windows to see if they’re still up to scratch.
The Smart Alitherm systems integrate high-performance double glazing with thermally efficient aluminium profiles, ensuring interiors remain warm while maintaining a contemporary appearance.
The broad range of RAL colours we offer makes it easy to meet specifications and deliver the required thermal performance without compromising on aesthetics.

Specify BDC Aluminium for Light, Performance and Design
Even in the darkest months and low-light conditions, the right glazing can transform interiors and improve internal daylight levels.
Our slimline Smart systems provide a practical, high-performance solution for modern construction and contemporary refurbishment projects.
If you’re looking to work with BDC Aluminium and elevate your next project, get in touch! Our experts are ready to assist you.