Our advanced agate grey uPVC window system is designed to deliver exceptional WER ratings and low U-values, resulting in reduced heating costs and increased property value. With double glazing, it achieves a WER rating of up to A++24 and a U-value as low as 0.9 W/(m²-K) with triple glazing.

Pilkington K Glass™ S is a cutting-edge, low-emissivity soft-coated product that delivers superior thermal insulation when used within an Insulating Glass Unit (IGU).

Its neutral appearance offers optimal solar heat gain, thermal insulation, and light transmission, ensuring top-tier Window Energy Rating (WER) performance.

This single-stock, soft-coated glass can be used in either annealed or toughened form, providing consistent thermal performance and a sleek, neutral look. Once incorporated into an IGU, it is ideal for windows in new homes, conservatories, and as replacements for existing windows.

Key Benefits:

• Enhances the energy efficiency of homes.
• Meets and exceeds the latest Building Regulations regarding energy efficiency when paired with a suitable window frame.
• Reduces heating costs by requiring less energy to maintain a comfortable temperature.
• Minimizes unsightly internal condensation.
• Helps achieve the highest possible Window Energy Ratings (WER).

We take security seriously, and our uPVC windows are fully accredited to meet the relevant standards and comply with the latest Building Regulations.

Our DIY uPVC windows start from just £65 inc. VAT, providing excellent value for money. With outstanding window quality, you can trust us as the UK’s leading double-glazing supplier. Check our customer reviews and case studies for reassurance, and buy directly online to save hundreds of pounds.

We offer high-quality, made-to-measure supply-only uPVC windows for trade, DIY enthusiasts, homeowners, the construction sector, renovation companies, and more across the UK.