FENSA Approved · Installsure Insured · 5★ Google Rated
01895 811 855
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West London · North London · Hertfordshire · Since 1996

Windows, Doors & Bifolds.
Fitted Properly, Every Time

NT Glazing has fitted windows and doors across West London, North London and Hertfordshire since 1996. We work with homeowners replacing tired frames, new-build projects going up from scratch, and builders who need a glazing supplier they don’t have to chase.

Call: 01895 811 855
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  • 4.9/5 · 840+ Reviews
  • FENSA · Installsure · 10 Year Guarantee

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    FENSA Registered

    Insurance Backed

    Trustpilot Excellent

    Checkatrade Verified

    10 Years Guarantee

    Our recent work

    Windows & Doors Fitted Across the Local Area

    From replacement windows and heritage-style glazing to aluminium doors and complete home upgrades, this is the kind of work NT Glazing carries out across West London, North London and Hertfordshire.

    Product ranges

    One Supplier. Every Product. No Compromise on Spec.

    The right glazing isn’t about choosing the most expensive option. It’s about choosing the right frame, glass and configuration for the property.

    NT Glazing supplies solutions across traditional homes, modern renovations, extensions and new-build projects.

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    Windows

    Heritage and flush sash options for period properties, alongside uPVC and aluminium systems for modern homes, extensions and new developments.

    • Heritage & period styles
    • uPVC & aluminium options
    • Energy-efficient glazing
    • Made-to-measure designs
    Explore Range
    Call now
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    Bifold Doors

    Two to six-panel configurations designed to open up kitchens, extensions and living spaces while keeping sightlines clean when the doors are closed. Experience a premium finish.

    • Two to six-panel configurations
    • Slim, clean sightlines
    • Smooth opening operation
    • Ideal for extensions & kitchens
    Explore Range
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    Roof Lanterns​

    Bring more daylight into extensions and kitchen-diners with roof lanterns designed around the proportions and layout of the room. Premium feel all over.

    • Classic multi-bar designs
    • Contemporary pitched styles
    • Pyramid roof lanterns
    • Bespoke configurations
    Explore Range
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    Find Your Fit

    Not Sure Which Fitting Is Right for You?

    A few quick questions can narrow down the options before you start comparing profiles, frame materials and specifications.

    No catalogue to wade through. No sales call required just to understand where to start.

    Call: 01895 811 855





      WHy choose us

      Premium and Trusted Supplier for More Than 3 Decades

      NT Glazing has been working across West London, North London and Hertfordshire since 1996.

      We’re independent and family-run, with a simple approach to glazing: understand the property properly, recommend what makes sense, price it clearly and remain accountable for the finished installation.

      • Free, no-obligation home survey
      • Fixed written price, valid for 90 days
      • 10-year insurance-backed guarantee
      • FENSA registered installer
      Years insurance-backed cover on every installation.
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      Call: 01895 811 855

      The Right Specification

      Better glazing starts with selecting the right combination of frame, glass and configuration for your property. We’ll explain the options clearly, helping you choose where an upgrade adds genuine value without paying for features you don’t need.

      FENSA Registered Installer

      NT Glazing is a FENSA registered installer, giving homeowners reassurance that their replacement windows and doors are installed through a recognised competent-person scheme and meet the relevant installation requirements.

      Clear Responsibility, From Survey to Installation

      You shouldn’t have to coordinate several different companies to get your installation completed. NT Glazing manages the process from the initial survey through to fitting, keeping communication and responsibility clear throughout the project.

      Ten-Year Guarantee and Protection Always

      NT Glazing installations come with a 10-year guarantee, supported by insurance-backed protection through InstallSure. Your installation remains protected beyond the day the fitting team completes the work.

      About us

      Every Job Comes Back to One Standard.

      NT Glazing is a family-run, FENSA-registered glazing company serving homeowners, self-builders and trade customers across West London, North London and Hertfordshire.

      We started in 1996 with a straightforward approach: understand the property, recommend the right product, fit it properly and stay accountable once the work is finished.

      Thirty years later, that principle still matters more than complicated sales language.

      Whether we’re replacing a handful of windows or helping specify glazing for a larger renovation or new-build project, the goal is the same: give the customer a solution that works for the property and a finished installation we’re prepared to stand behind.

      Learn More About NT Glazing

      Made to Measure

      Your Home Isn't Standard Size. Your Glazing Shouldn't Be Either.

      From replacement windows and heritage-style glazing to aluminium doors and complete home upgrades, this is the kind of work NT Glazing carries out across West London, North London and Hertfordshire.

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      real Customers, real homes

      Rated 4.9 / 5 by 840+ homeowners.

      Sarah Mitchell Uxbridge

      From the free survey to the final install, every step felt considered. The flush sash windows completely transformed the front of our Victorian terrace.

      Sarah Mitchell Uxbridge

      From the free survey to the final install, every step felt considered. The flush sash windows completely transformed the front of our Victorian terrace.

      Sarah Mitchell Uxbridge

      From the free survey to the final install, every step felt considered. The flush sash windows completely transformed the front of our Victorian terrace.

      Sarah Mitchell Uxbridge

      From the free survey to the final install, every step felt considered. The flush sash windows completely transformed the front of our Victorian terrace.

      Sarah Mitchell Uxbridge

      From the free survey to the final install, every step felt considered. The flush sash windows completely transformed the front of our Victorian terrace.

      Sarah Mitchell

      Uxbridge

      “From the free survey to the final install, every step felt considered. The flush sash windows completely transformed the front of our Victorian terrace.”
      Flush Sash Windows · Victorian Terrace

      David & Helen Reid

      Ruislip

      “We compared three companies. N Glazing was the only one that actually explained the differences between uPVC and aluminium in plain English. Fitters were immaculate.”
      6-panel Bifold + Kitchen Extension

      James Patterson

      Ealing

      “Bifold doors and a roof lantern in the same job. The house feels twice the size. Genuinely no complaints — a rare thing.”
      Aluminium Front Door

      Where It's Actually Made

      Recent Work Portfolio

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      Call: 01895 811 855

      made in britain

      Nothing About This Gets Outsourced.

      Your windows and doors are cut, welded and glazed in our UK facility using systems from

      Smart Systems, REHAU and Schüco, then installed by our own directly employed fitters.

      There’s no handoff between the team responsible for the frames and the team accountable

      for the installation. One team, one responsibility, from production to final seal.

      28 yrs

      UK manufacturing

      12,400+

      Homes improved

      A+

      Energy rating

      10 yr

      Guarantee

      In-house

      Fitting team

      Family

      Run since 1996

      Tour the workshop

      Trusted product partners

      Built with the industry's leading systems

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      FAQ's

      Questions We Often Get Asked

      Start by booking a free home survey.

      We'll look at the property, take the required measurements and discuss the type of windows, doors or glazing you're considering.

      You'll then receive a clear written quotation before deciding whether you'd like to proceed.

      Written quotations are normally prepared following the survey and discussion of your requirements.

      We'll let you know the expected turnaround when the survey is booked.

      Your written quotation is valid for 90 days from the date it is issued.

      That gives you time to consider the specification and pricing without needing to make an immediate decision.

      NT Glazing provides a 10-year guarantee, with insurance-backed protection through Installsure.

      Full guarantee terms are available from the team so you can see exactly what is covered before proceeding.

      No.

      We work across replacement glazing, home renovations, extensions and new-build projects.

      NT Glazing Information & Resources

      The more you understand before asking for a quote, the easier it is to tell whether you’re being offered the right specification.

      Our guides break down glazing in practical terms without drowning you in technical language.

      One Last Chance Before You Go

      Still Deciding?
      Get Your Free Quote.

      Fill out this 10-second form to get your fixed-price survey booked before you leave. No pressure, quotes valid for 90 days.

      • 10-year insurance-backed guarantee
      • FENSA registered installer
      Call: 01895 811 855

      Quick Quote Form

      Get a free estimate sent straight to your phone.

        Your details are 100% private and never shared.

        NT Glazing is a family-run, FENSA-registered glazing company serving homeowners, self-builders and trade customers across West London, North London and Hertfordshire.

        FENSA Approved
        10 Year Guarantee

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