Upper Glass

The preferred choice for commercial applications

When it comes to selecting the right windows and doors for your commercial projects, you’ll want to strike the optimum balance between energy efficiency, acoustic, security, weather performance, durability, low maintenance, colour and great looks. Reliability is also important. Time is of the essence when it comes to managing large projects, with tight schedules at each stage. On time, in full deliveries and efficient installation are key criteria.

Our systems partners have been manufacturing window and door profile for the domestic, public and commercial sectors for many years. Together we have a strong and knowledgeable network of fabricators and installers providing the best in quality, on-time delivery and installation.

UpperGlass is a revolutionary system, with innovation, ecology and design at its core.

Combining new materials and processes, UpperGlass™ increases maximum product sizes and improves thermal performance, elevating UpperGlass™window and doors to a whole new level.

Available in array of colours and finishes, UpperGlass™ provides the ultimate solution for homeowners and architects alike.

Weather Performance

The UpperGlass™ multi-function weatherseal is at the cutting edge of modern design and material technology. The unique design is capable of achieving impressive weather tightness, even without optimum compression, this in turn reduces everyday strain placed on operating hardware, lengthening the lifespan of the window.


PAS24 is the recognised enhanced security standard for windows and doors, to which all elements of the UpperGlass™ range are Kitemark certified. Each iCOR building block used to create UpperGlass™ was designed to be compatible with all standard hardware, simplifying what is required to comply with the PAS24 requirements.

Energy Efficient

High performance double and triple glazing

Specifying windows and doors with the highest thermal performance is vital at a time of soaring energy costs and Government’s drive to improve the energy efficiency of buildings.

Energy rated windows stop heat escaping and capture warmth from natural sunlight, helping save money on fuel bills.

Our high performance double glazed windows achieve A*10 energy rating, or a U-value as low as 1.2 W/m²K, providing superb thermal insulation.

Our triple glazed windows achieve A*25 energy rating, or a U-value
as low as 0.8 W/m²K, for the best in energy efficiency.

Thermal Chamber Insulator (TCI)

The TCI is a UpperGlass™ thermal insert placed inside the window profile, replacing steel reinforcement.

Based on theoretical thermal modelling tests, we found that by using UpperGlass™ thermal chamber inserts instead of steel, window energy ratings and U-values are significantly improved.

UpperGlass™ thermal inserts also weigh less than steel and are 100% recyclable.

The Cristallo TCI product meets the following British Standards:
• BS 7412 – Specification for UpperGlass™ Windows & Doorsets
• PAS 24 – Enhanced Security for Windows & Doorsets

Cristallo triple glazed windows achieve a U-value as low as 0.8 W/m²K for the best in energy efficiency

Unique glass fibre technology improves thermal efficiency by 30%

Improved U-values with UpperGlass™ thermal inserts

Download Our Upper Glass Brochure