Simply amazing glazing

The glass makes the difference

When it comes to rooflights, the glass you choose can make a huge difference to the performance of your product.

Glass will typically make up 70% of your rooflight, and it's at the heart of controlling the flow of natural light, the level of safety and security, and of heat retention. It can even help protect furniture against fading.

Stella and Planitherm glass

Stella rooflights use the highest performance Comfort Plus glass units that include Planitherm low-E. These modern high tech glazing units maximise comfort, for a difference you may not 'see' but will certainly feel.

Whether you’re looking for warmth, a peaceful night’s sleep or to enjoy a sun-filled room without overheating, Planitherm units offer the ultimate high-performance glass for every application.

​It's the UK's leading energy-efficient glass and can be incorporated into any style of rooflight.

Stella Rooflights Glazing - Where Innovation Meets Clarity

Discover the hassle-free world of self-cleaning glass and rooflights, revolutionising the way you experience natural light in your spaces. We understand that cleaning rooflights, especially those in hard-to-reach places, can be a daunting task. That’s why we’ve incorporated cutting-edge self-cleaning technology into our Stella rooflights, ensuring a crystal-clear view without the stress.

What is Self-Cleaning Glass?

Self-cleaning glass comes in two variants: hydrophobic and hydrophilic. Both types use water to effortlessly clean the glazing, but hydrophilic coatings, featuring titania, go the extra mile by chemically breaking down absorbed dirt in sunlight.

Hydrophilic Self-Clean Glass: Known for the “lotus effect,” this glass boasts high water repellence, mimicking the lotus flower’s leaves. The titanium dioxide coating reacts with UV light, generating electrons that break down organic dirt into minuscule pieces. Rainwater then
easily washes away the debris, leaving your rooflights pristine and streak-free.

Photocatalytic Self-Clean Glass: This glass operates similarly to hydrophilic glass but includes an additional titanium dioxide coating. Utilising sunlight through a process called photocatalytic decomposition, it breaks down dirt on the glazing. When it rains, the water washes away any loosened dirt, leaving no streaks behind. The coating ensures even water runoff, quick drying, and a long lifespan.

Stella Rooflight and Saint Gobain Glass

At Stella Rooflights, we exclusively use SGG BIOCLEAN self-cleaning glass as standard. This high-performance glazing features a dual -action ‘hydrophilic’ and ‘photocatalytic’ coating, utilizing daylight and rain to break down and wash away organic dirt. Rest assured, the transparency of the glazing remains unchanged.
Our SGG BIOCLEAN complies with the European self-cleaning norm for glass EN 1096-5, offering a reliable and efficient solution for your rooflight needs.

Benefits of Self-Cleaning Glass

Long Lasting Clarity

Glass stays cleaner for an extended period, reducing cleaning bills.

Cost Savings

Ongoing savings with reduced window cleaning expenses.

Uninterrupted Views

Enjoy a clear view outside even during rainfall, thanks to the sheeting effect.

Environmentally Friendly

Less frequent use of water and detergents, making it eco – friendly.

Quick and Easy Maintenance

Less dirt and grime adhere to the glass, simplifying cleaning.

Perfect for Hard to Reach Areas

Ideal for rooflights situated in inaccessible locations.

Watch Our Video to Learn More about Stella Rooflights and Self -Cleaning Glazing

For further information on our Stella rooflights and the benefits of self-cleaning glazing, contact our knowledgeable team at 01794 745445 or email us at
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A wide range of rooflight glazing options for every application

We offer a wide range of glazing options for our bespoke rooflights and skylights. Typically our focus is on thermal performance and self-cleaning. If however you have a requirement for improved sound efficiency, fire, safety or shading then we will have a range of options available for you.

​There are a number of factors that you should consider when designing your rooflights and probably the most important is to specify the right glass for the application in which it is being used.

This means that the type and thickness of the rooflight glazing also needs careful consideration. For example, the larger the glass area then the thicker the units will be.

Toughened or laminated glass?

The positioning of the rooflight will also determine what type of glass should be used in the unit make up. For example, our double and triple glazed rooflight units would normally be produced using toughened safety glass but if your rooflights are being fitted at a height of 5mts or more above floor level, then the inner pane should be laminated glass.

Likewise, if you are using large areas of glass at lower levels you should consider what is going to be underneath and undertake a risk assessment to decide whether having a laminated inner pane is a better option.

If laminated glass is viewed as even safer than toughened, you may wonder why we wouldn’t include that in our units as standard. Choosing your rooflight glass unit specification is as important as the frame itself and needs careful consideration.

Not all glass options are suitable for all applications and we would always advise that you discuss your project with us. We have written a helpful article on the practicalities involved is specifying large rooflights.
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