uPVC – Windows
Durable, stylish and energy efficient |
Triple Glazed as Standard
Why you should choose uPVC Windows
At Glass Worx Ltd, we supply and install premium, energy-efficient uPVC window systems. With their stylish and versatile design, our windows are the perfect choice for enhancing any property.
Internom uPVC Windows
✔ Energy efficient
✔ Low U – values
✔ Passive house standard
✔ RAL colour options
✔ RC1 to RC3 Security levels
DAKO uPVC Windows
✔ Energy efficient
✔ Low U – values
✔ Passive house standard
✔ RAL colour options
✔ RC1 to RC3 Security levels
Affordable Luxury with Premium Performance
When it comes to combining energy efficiency, durability, and sleek design, triple glazed uPVC windows are an exceptional choice for new builds, commercial projects, and self-build homes. Modern uPVC systems from premium manufacturers like DAKO and Internorm have evolved far beyond traditional plastic profiles.
Clean contemporary lines
With clean, contemporary lines and a variety of colour and finish options — including timber-effect foils and aluminium cladding — uPVC windows offer impressive design flexibility for both minimalist and traditional architectural styles. Slim frames and concealed hardware enhance visual appeal while maximising natural light, making them a perfect fit for fabric-first and low-energy homes.
With clean, contemporary lines and a variety of colour and finish options — including timber-effect foils and aluminium cladding — uPVC windows offer impressive design flexibility for both minimalist and traditional architectural styles. Slim frames and concealed hardware enhance visual appeal while maximising natural light, making them a perfect fit for fabric-first and low-energy homes.
Built for Performance: Engineered for the Future
Today’s high-end uPVC windows are not only stylish but incredibly advanced in performance. DAKO’s triple glazed vinyl windows offer U-values as low as 0.77 W/m²K, while Internorm’s KF310 model achieves passive-house standard performance with U-values down to 0.63 W/m²K.
Structural Integrity
Reinforced multi-chamber frames improve structural rigidity and thermal insulation, while triple sealing systems and high-spec glazing eliminate draughts and minimise sound transmission. Key features like integrated ventilation systems, I-tec secure locking, and long-life materials ensure maximum comfort, security, and low maintenance. For developers or homeowners seeking a sustainable, future-proof solution without compromising on style, triple glazed uPVC systems deliver performance that lasts — with the aesthetics to match.
Reinforced multi-chamber frames improve structural rigidity and thermal insulation, while triple sealing systems and high-spec glazing eliminate draughts and minimise sound transmission. Key features like integrated ventilation systems, I-tec secure locking, and long-life materials ensure maximum comfort, security, and low maintenance. For developers or homeowners seeking a sustainable, future-proof solution without compromising on style, triple glazed uPVC systems deliver performance that lasts — with the aesthetics to match.
Product Videos
Visit our showroom
Our Cowshed Showroom in Stirling features a wide range of display products and our friendly team will gladly talk you through them. Showroom visits can be booked for any time that suits you. We’ll even make you a barista-style coffee!
Recent projects
Retrofit project in east kilbride
Internorm extension project
Extension project
Internorm windows and doors
Sliding door Extension project – Glasgow, Scotland
Edinburgh extension project