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Premium uPVC and Aluminium Windows, Doors & Glazing Solutions — FENSA Registered and Trusted Across the South East

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High-Quality Windows and Doors for Every Property

At M25 Windows, we offer a carefully curated range of premium uPVC and aluminium products — all manufactured to the highest standards of durability, energy efficiency, and modern design. Whether you’re refurbishing a home, extending a property, or working on a commercial project, we have glazing solutions to suit your style and budget.
All products are available in a wide variety of colours, finishes, and configurations, and are installed by our fully qualified, FENSA-registered team.

Our Core Range

uPVC Windows

Our energy-efficient uPVC windows are designed for performance, security, and minimal maintenance. With multi-chambered frames and high-spec glazing, they help reduce heat loss and cut down on external noise.
  • Casement, tilt & turn, sash and bay options available
  • A-rated thermal performance
  • Secure multi-point locking
  • Choice of finishes including woodgrain, anthracite grey, and white
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Aluminium Windows

For a more contemporary aesthetic, our slimline aluminium windows offer strength, elegance, and impressive energy performance.
  • Ultra-slim sightlines for maximum natural light
  • Thermally broken profiles
  • Powder-coated finishes in any RAL colour
  • Long-lasting and resistant to warping or corrosion
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uPVC Doors

Safe, stylish, and low-maintenance, our uPVC doors are ideal for front entrances, back gardens or side access points.
  • Panel, half-glazed, and fully-glazed designs
  • Wide range of styles, colours and hardware
  • Outstanding weather resistance and insulation
  • Secure locking systems
View uPVC door designs →

Aluminium Doors

Create a modern statement with our sleek aluminium door options — combining durability with minimalistic design.
  • Ideal for residential or commercial entrances
  • Strong, low-maintenance frames
  • High-security multi-point locking
  • Custom sizes and colours available
Find out more →

Bifold Doors

Transform your living space with our beautiful aluminium bifold doors — designed to open up your home and seamlessly connect indoor and outdoor areas.
  • Smooth-glide folding mechanism
  • Slim profiles and large glass panels
  • Multiple configurations to suit your opening
  • Fully weather-sealed and energy efficient
See bifold options →

Double Glazing & Replacement Units

Looking to upgrade old or misted units? We offer a full range of replacement double-glazed sealed units with fast turnaround times and expert fitting.
  • Energy-saving glass with low-emissivity coatings
  • Clear, frosted, or patterned finishes available
  • Argon-filled units for enhanced insulation
  • Suitable for most existing frames
Get a quote for replacements →

All Products Include:

  • Free site survey and expert advice
  • Full installation by FENSA-certified engineers
  • Long product warranties
  • Post-installation aftercare and support

We’ll guide you through your options with honest advice and product samples — ensuring the right fit for your home or project.

Book a Free Consultation →
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  • Expert Window & Door Installers Covering London and Beyond

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