Triple Glazed Window Supply & Fitting London | Window Fitters Ltd

High-Performance Triple Glazing Installation

As UK energy bills continue to rise, achieving maximum thermal insulation at home has never been more critical. Triple glazing represents the leading edge in energy-efficient window technology. By introducing a third pane of glass and an additional insulating cavity, triple-glazed units offer outstanding heat retention and acoustic insulation. Window Fitters Ltd provides professional supply and installation of high-efficiency triple glazing.

How Triple Glazing Works

Triple glazing consists of three panes of glass separated by two sealed chambers. To optimise insulation, our units incorporate several advanced design elements:

• Low-E Glass Coatings: The inner panes feature microscopically thin metal oxide coatings that reflect heat back into your home while allowing natural light and solar warmth to pass through.
• Argon Gas Fills: The cavities between the glass panes are filled with argon gas, which is denser than air and significantly slows down the conduction of heat.
• Warm Edge Spacer Bars: Rather than cold-conducting aluminium spacer bars, we use structural foam spacer bars to eliminate thermal bridging around the perimeter of the sealed unit.
• Massive U-Value Reductions: While old single glazing has a U-value around 5.0 W/m²K and modern double glazing hovers between 1.2 and 1.4 W/m²K, our high-performance triple glazing achieves whole-window (Uw) U-values ranging from 0.64 to 0.94 W/m²K. For ultra-low energy and Passive House builds, we supply and fit advanced timber and alu-clad systems-including high-specification brands such as Norrsken (frequently searched as "morsken")-that drop whole-window U-values as low as 0.64 W/m²K.

Market-Wide Sourcing: Quality & Durability First

We can source virtually any window system on the market to match your exact architectural drawings and performance criteria. Rather than restricting you to a single manufacturer, we evaluate systems based on structural rigidity, weather tightness, frame thermal breaks, and long-term durability to ensure your investment lasts for decades.

Acoustical and Sound Proofing Benefits

The extra glass pane and dual-chamber construction create a highly effective acoustic barrier. By using varying thicknesses of glass and cavity widths (acoustic glazing), we can disrupt sound waves and significantly reduce traffic, aircraft, and street noise.

Document L Compliance & Certifications

All triple glazing installations by Window Fitters Ltd fully comply with UK Building Regulations Document L (Conservation of Fuel and Power), achieving whole-window U-values between 0.64 and 0.94 W/m²K-far exceeding the minimum 1.4 W/m²K requirement for replacement windows and the 1.2 W/m²K target for new builds. We coordinate directly with local authority building control (LABC) or approved private inspectors to secure building regulations Completion Certificates for your records.

Improve Your Home's Efficiency

Contact us today for a free survey and consultation in Croydon, London, Surrey, and surrounding areas (within a 40-mile radius).

• Phone: 020 3411 0589
• Email: info@windowfitters.uk

About the Author: Marian Gheorghe

Head Window Fitter & Active Director, Window Fitters Ltd

Marian Gheorghe is the Head Window Fitter and Active Director of Window Fitters Ltd. With over 15 years of hands-on experience in the glazing and glazing industry across London, Marian leads the direct-employment labour force and oversees technical safety compliance for all residential and commercial JCT contracts. He ensures every installation conforms to British Standards and UK Building Regulations.

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