At Direct Roofing Systems, we design, manufacture, and supply aluminium patio doors to the trade nationwide. Whether you’re a professional installer looking for reliable products for your clients or a homeowner researching the best upgrade for your property, patio doors are a stylish, practical, and energy-efficient solution.
Our Cortizo sliding patio doors are crafted from high-performance aluminium, offering superior thermal efficiency, acoustic insulation, and robust security features. But what makes them stand out from other options on the market?
Here are five reasons why you (or your customer) should choose Cortizo aluminium patio doors.
1. Outstanding Thermal Efficiency
Energy efficiency is one of the top priorities for modern homeowners. Our Cortizo sliding doors are engineered to achieve U-values as low as 1.4 W/m²K, ensuring excellent insulation. This helps keep homes warmer in the winter and cooler in the summer, reducing reliance on heating and air conditioning.
For installers, this means you can confidently offer your customers a door system that meets stringent energy performance requirements while also helping them save money on energy bills.
2. Triple Glazing for Light and Security
While double glazing has long been the standard, we go a step further with triple glazing up to 34mm thick. This provides:
- Enhanced thermal insulation – keeping heat inside during colder months.
- Slim 20mm mullions – allowing maximum natural light to flood into any space.
- Improved security – the extra pane of glass makes forced entry far more difficult.
For added peace of mind, the Cortizo sliding patio door is fitted with a five-point locking system, offering top-tier protection against intruders.
3. Built for All Weather Conditions
The British climate can be unpredictable — but aluminium is more than up to the challenge. Strong, durable, and sustainable, aluminium frames ensure your doors remain structurally sound against heavy rain, strong winds, and temperature fluctuations.
Our Cortizo patio doors are rigorously tested for performance, meaning installers can assure their customers of year-round reliability.
4. Customisation in Colours, Styles, and Sizes
No two projects are the same, which is why we offer a wide range of design options. Customers can choose from powder-coated colours, including modern smooth finishes, traditional woodgrain effects, or even bold statement shades to suit any property style.
Cortizo sliding doors are also available in multiple configurations:
- 2, 3, 4, or 6 sashes
- Double or triple track options
- Maximum size of 2500mm x 3000mm (LxH)
This flexibility makes them suitable for anything from compact homes to large-scale architectural projects.
5. Excellent Acoustic Insulation
Noise pollution is a growing concern, particularly for properties near busy roads, railways, or urban centres. Our Cortizo aluminium patio doors provide high acoustic insulation, keeping external sounds out and ensuring a peaceful indoor environment.
For trade installers, this is another strong selling point when working with customers who value privacy and tranquillity.
Why Choose Direct Roofing Systems?
At Direct Roofing Systems, we don’t just supply doors — we support installers and customers at every stage. Our aluminium patio doors combine style, performance, and long-lasting durability, giving you a premium product that adds value to any property.
If you have any questions about our patio doors, contact – call us on 01623 702611 or fill out our online survey form for a free quote.
