Which window material is best for a commercial building?

Aluminium is the go-to for offices, retail and large commercial frontages — slim sightlines, long lifespan and excellent thermal performance. uPVC is the most cost-effective option for housing, community buildings and schools. Timber (and timber sash) is required for heritage and listed buildings — we supply all three.

Do you handle full-block window replacements on occupied sites?

Yes. Phased programmes around live tenants are routine for us — local authority housing, schools, offices and community centres. We coordinate scaffold, access and resident communications and work out-of-hours where needed.

Are you FENSA registered?

Yes. NZR is FENSA registered, CHAS accredited and Constructionline Gold certified. All replacement glazing is self-certified and registered for Building Regulations compliance.

Can you replace failed double-glazed units only?

Yes — if frames are sound but units are misted, blown or cracked we can survey and replace IGUs only. This is usually faster and significantly cheaper than full window replacement.

Do you carry out window hardware repairs?

Yes — hinges, handles, restrictors, locks, espag mechanisms and friction stays. Most parts are stocked for same-week fixes. See our Repairs & Maintenance page for full reactive cover.

What areas do you cover?

London and the South East — Kent, Surrey, Essex and Sussex. Larger commercial programmes considered nationally on request.

020 8970 7013 info@nzrwindowsanddoors.co.uk

24/7 Emergency:07503 379 215

Commercial aluminium, uPVC and timber windows — London & South East

Installation Service

Commercial Windows (Aluminium, uPVC & Timber)

We supply, install, replace and maintain commercial windows across London and the South East — aluminium, uPVC, and timber (including timber sash for heritage buildings).

Clients We've Worked With

Trusted by leading brands across retail, corporate, education and public sectors

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— Specify your system

Choose your window type

Three core systems we install and maintain across commercial and heritage buildings. Pick a system for full specs, applications and recent projects.

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Aluminium window installation – commercial building, London & South East

Aluminium Windows

Commercial aluminium window installations, replacements and upgrades for offices, schools and commercial buildings across London and the South East.

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Recent project

Dover Innovation Centre

Commercial office · Dover

uPVC window installation – commercial building, London & South East

uPVC Windows

Commercial uPVC window installations, replacements and maintenance for offices, schools and commercial buildings across London and the South East.

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Recent project

Honor Oak Community Centre

Local authority · SE4

Timber sash windows – heritage building installation, London & South East

Timber Windows

Timber window installations, replacements and repairs including timber sash windows for heritage buildings, schools and listed properties across London and the South East.

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Recent project

St James the Great School

Heritage / Education · Peckham

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Window Projects

Recent Commercial Window Projects

All case studies

The Painter Building, London N1 — Large Glazed Units Replaced at Height

Commercial Offices / FM

White Lion Street, Islington, London N1

Painter Building — Specialist High-Level Glass Replacement

Access tower, specialist lifting and a four-engineer team

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Joydens Wood Community Centre — New Windows and Aluminium Doors

Local Authority / Community

Joydens Wood, Dartford, Kent

Joydens Wood Community Centre — Window & Door Upgrade

White uPVC windows and thermally broken aluminium doors

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College Park School — 14 Opening Sashes Repaired

Education / SEN

London

College Park School — 14 Sash Repairs and Hinge Replacements

Restricted hinge sets replaced across two classrooms

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Maidstone Hospital — 37 Jackloc Restrictors Fitted on Wards

Healthcare / NHS

Maidstone, Kent

Maidstone Hospital — 37 Window Restrictors Fitted

Ward windows restricted and handles adjusted

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Mears (Tower Hamlets) — Responsive Window Repairs Across Housing Stock

Social Housing / FM

Tower Hamlets, East London

Mears, Tower Hamlets — Responsive Window and Door Maintenance

Handles, hinges, restrictors and glazing across occupied homes

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From the job sheet

More Recent Window & Glazing Work

Commercial — London

— Our Capabilities

Commercial glazing services

Complete glazing solutions for businesses, FM companies, schools and public sector organisations across London and the South East.

Need a repair or maintenance visit? Visit our repairs hub

Entrance Doors

Commercial aluminium and glass entrance doors for offices, retail, gyms, schools and managed buildings across London and the South East.

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Commercial Shopfronts

Complete commercial shopfront systems — aluminium-framed and frameless glass shopfronts, shopfront glazing and entrance doors for retail, hospitality and managed buildings.

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Curtain Walling

Large-scale curtain wall systems, structural glazing and facade installations for commercial developments.

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