Commercial Glazing and Facade Contracting Services
Commercial fenestration packages demand rigorous subcontract governance, strict CDM 2015 safety compliance, and specialist plant for heavy architectural glass installation. Window Fitters Ltd delivers commercial glazing and structural facade packages for Tier-1 and Tier-2 main contractors, commercial developers, architects, and facilities managers across Greater London, Surrey, and the South East from our Croydon HQ via structured travel tiers (<15m local at £540/day, 15-45m extended at £580/day, >45m outer Surrey with half-day minimum).
With a project history spanning hundreds of commercial sites, our experienced glazier teams manage contracts from targeted high-street retail shopfronts and office partition screens to 1,000+ m² multi-storey building envelopes. We operate under standard JCT and NEC subcontracts backed by £5,000,000 Commercial Public Liability and £10,000,000 Employers Liability insurance.
Thermally broken stick curtain walling installation in London
Scale: Up to 1,000+ m²
Proven delivery capacity from single retail door replacements to extensive multi-storey facade envelopes across hundreds of active UK commercial construction sites.
JCT & NEC Subcontracts
Structured commercial management under JCT Design & Build, Minor Works, Intermediate, and NEC3/NEC4 terms with itemised progress valuations and applications.
100% CSCS & SSSTS
Directly supervised site installation teams led by SSSTS supervisors and CSCS site safety compliant/3 glaziers holding valid CSCS cards, CPCS plant tickets, and IPAF access credentials.
Plant & Heavy Handling
Specialist glass lifting equipment, including calibrated vacuum suction lifters and compact spider cranes, is hired in on a project basis for panels exceeding safe manual handling weights.
Commercial Systems, Profile Brands & Technical Specifications
Commercial glazing packages demand strict architectural coordination across framing metallurgy, structural wind-load resistance, acoustic dampening, and solar heat control. As an experienced trade subcontractor, Window Fitters Ltd fabricates, installs, and glazes across all major UK and European commercial profile systems:
| Glazing System Type | Leading UK Brand Profiles | Glass & Thermal Performance | Primary Commercial Applications |
|---|---|---|---|
| Stick Curtain Walling | Kawneer AA100, Schüco FWS 50/60, Senior SF52, Smart MC600 | 28 mm to 44 mm solar control units; CWCT 600 Pa water tightness; Ucw down to 1.1 W/m²K | Multi-storey office elevations, glazed atriums, retail facades, public buildings |
| Commercial Shopfronts & Entrances | Smart Wall, Senior SPW501, Kawneer 190/350 heavy-duty aluminium | 11.5 mm acoustic laminated / 12 mm toughened safety glass; Document M low thresholds | High-street retail units, school entrances, reception screens, corporate foyers |
| Multi-Unit Commercial Windows | Schüco AWS 70, Reynaers MasterLine 8, Rehau Total70, Eurocell Modus | 28 mm Argon Low-E units; PAS 24 security tested; Uw 1.2 to 1.4 W/m²K | Build-to-Rent schemes, student accommodations, residential apartments, hotels |
| Composite & Hybrid Facades | Velfac 200 system (external powder-coated aluminium with internal timber core) | High-performance acoustic double/triple glazing; slim 54 mm uniform sightlines | Educational campuses, healthcare clinics, high-specification residential developments |
| Commercial Sliding & Bifold Screens | Reynaers CP 130/155, Cortizo Cor Vision, Smart Visoglide, Alumil MF65 | Heavy-load roller carriages supporting up to 400 kg panel weight; multi-point hook locks | Executive boardrooms, rooftop restaurant pavilions, hotel terraces, luxury penthouses |
| High-Security Commercial Entrances & Screens | Smart Wall, Senior Architectural Systems SPW501, Schuco ADS 75, Jack Aluminium | PAS 24:2022 security testing; multi-point hook locking; anti-finger trap stiles; commercial overhead closers | Retail entrance portals, corporate reception screens, high-traffic commercial foyers, educational facilities |
Our fitting teams install both supply-and-fit commercial packages and labour-only or installation-only subcontracts where profile systems and glass are procured directly by the principal contractor or developer. Operating as an installation-only glazing company when required, we supply a dedicated installers team only to fit client-procured systems. Learn more about our structural envelope capabilities in our curtain wall installation guide, review building exterior systems in our facade installation guide, explore entrance door systems in our door installation guide, and inspect internal room divisions in our glass wall panels guide.
Structured Two-Phase Project Planning & Site Management
Careful advance planning and phased execution prevent programme delays, eliminate trade stacking on site, and protect delicate architectural finishes. Window Fitters Ltd works closely with client project managers, structural engineers, and quantity surveyors at each milestone, systematically dividing complex commercial glazing packages into two defined phases:
Phase 1: Pre-Construction Survey, Structural Grid & Weathertight Prep
The first phase establishes structural stability, precise building datum lines, and weatherproofing barriers before glass is called forward to site:
- 3D Laser Site Survey: Verifying concrete floor slab levels, structural steel openings, and masonry reveals against approved architectural elevations to compensate for site casting variances.
- Bracketry & Structural Fixings: Installing heavy-duty steel and aluminium dead-load and slotted wind-load brackets fixed into concrete slabs with chemical resin anchors or cast-in halfen channels.
- Primary Grid Erection: Setting vertical mullions and horizontal transoms plumb, level, and square to within 1 mm diagonal tolerance using rotating optical lasers.
- Vapour & Thermal Barrier Sealing: Applying continuous EPDM perimeter membranes, insulated cavity closers, and vertical slab-edge acoustic barriers to secure initial weathertightness.
Phase 2: Plant-Assisted Glazing, Pressure Capping, Weather Sealing & Handover
The second phase executes precision glass handling, mechanical fixing, statutory testing, and progressive quality sign-off:
- Coordinated Just-in-Time Delivery: Calling glass units to site floor-by-floor in accordance with master construction schedules, preventing lay-down congestion and site damage.
- Mechanical Vacuum Lifting: Positioning insulated glass units using project-hired battery-powered vacuum lifters, compact spider cranes, or floor-mounted lifters operated by certified operatives under LOLER standards.
- Pressure Plates & Capping: Installing continuous thermal break isolators, torquing pressure plate screws to exact manufacturer newton-metre tolerances, and snapping on external architectural face caps.
- Perimeter Weather Mastic: Injecting low-modulus neutral cure silicone perimeter seals over closed-cell backing cords to provide long-term water and air tightness.
- Testing & O&M Sign-Off: Carrying out CWCT hose spray testing on sample elevations, completing Inspection and Test Plan (ITP) sign-offs with the client project manager, and delivering complete O&M manuals with warranty certificates.
Educational & Public Sector Glazing Packages
Educational and public buildings require heavy-duty commercial hardware, finger-protection pivot stiles, thermal efficiency, and high acoustic dampening. Window Fitters Ltd completes term-contract and fast-track holiday refurbishments for schools, academies, and universities across London and Surrey.
All site operatives hold enhanced DBS disclosures where required on educational grounds, working strictly to agreed site security boundaries and safety method statements under our corporate site safety protocols.
High-traffic entrance screen installation using composite framing
Commercial Glazing Guide Pricing & Subcontract Day Rates
To assist commercial estimators, quantity surveyors, and project directors with preliminary cost planning, commercial glazing rates are outlined below. Figures represent typical trade averages for commercial packages across Greater London and Surrey:
| Glazing Package Element | Labour-Only Installation Rate | Supply & Fit Package Estimate |
|---|---|---|
| Commercial Aluminium Windows | £50 to £85 per m² | £320 to £520 per m² |
| Multi-Unit Residential uPVC Windows | £45 to £75 per m² | £220 to £380 per m² |
| Ground-Floor Aluminium Shopfronts | £90 to £160 per m² | £450 to £850 per m² |
| Stick Curtain Walling (Ground / Low-Rise) | £85 to £140 per m² | £540 to £750 per m² |
| Multi-Storey Facades (Plant Assisted) | £130 to £210 per m² | £650 to £1,100 per m² |
| Internal Acoustic Glass Partitions | £40 to £75 per m² | £180 to £340 per m² |
| Automated Commercial Entrance Doorset | £650 to £1,200 per doorset | £4,500 to £9,500 per doorset |
| High-Security Commercial Entrance Doorset | £250 to £450 per doorset | £1,200 to £2,400 per doorset |
Commercial Subcontracting Day Rates (Labour Only)
For main contractors seeking skilled labour packages to fit client-procured systems, our transparent day rates for CSCS-carded operatives are detailed below:
| Trade Role / Operative Tier | Standard Day Rate (8h Shift) | Qualifications & Equipment Included |
|---|---|---|
| Skilled CSCS Glazier / Fixer | £220 to £280 | Blue Skilled Card; CSCS site safety compliant/3; 110V power tools; PPE |
| Leading Hand / SSSTS Site Supervisor | £280 to £340 | Gold Supervisor Card; SSSTS; First Aid at Work; daily briefings |
| 2-Man Glazing Fixing Team | £540 to £580 (£540 local, £580 extended) | 1 Leading Hand + 1 Skilled Fixer; complete hand & laser tools |
| 3-Man Team with Certified Plant Operator | £720 to £880 | Includes IPAF/CPCS plant operator for spider crane/MEWP lifting |
Day rates and square-metre rates depend on site access, floor heights, lifting plant requirements, and weekend or out-of-hours scheduling. Detailed subcontract terms can be reviewed in our dedicated labour-only glazier guide and commercial B2B contracting hub.
Statutory Compliance, CWCT Standards & CDM 2015
Commercial glazing installations must satisfy multiple statutory codes and technical standards under UK construction law:
- CDM Regulations 2015: We liaise directly with principal contractors and principal designers, integrating our site-specific RAMS, lift plans, and COSHH assessments into the master pre-construction safety file. Review our safety documentation standards in our RAMS document guide.
- CWCT Standards: Curtain walling systems are engineered and tested in accordance with Centre for Window and facade glazing Technology (CWCT) standards, verifying air permeability (600 Pa), water tightness (600 Pa dynamic), and wind resistance (2400 Pa structural).
- Approved Document L2 (Conservation of Fuel and Power): Non-domestic window and curtain wall schedules comply with strict thermal efficiency targets, achieving whole-window Uw values of 1.4 W/m²K or better. Read our technical calculations in our window U-value guide.
- Approved Document K (Protection from Impact & Manifestation): Glazing in critical locations complies with BS EN 12600 Class 1B1. Full-height clear glass partitions incorporate mandatory manifestation at two levels (850 mm to 1,000 mm and 1,400 mm to 1,600 mm from finished floor level).
- Approved Document M (Access to and Use of Buildings): Commercial entrance doors provide minimum 800 mm clear opening widths, low 15 mm weather-rebated thresholds, and automated or low-opening-force door closers. Explore entrance door options in our commercial doors directory.
- Approved Document B (Emergency Egress): Window openings along designated egress routes satisfy statutory means of escape dimensional standards (minimum 0.33 m² openable area and 450 mm clear width/height), fitted with 90-degree egress friction stays.
- Approved Document E (Resistance to Sound): High-specification acoustic double glazing units provide acoustic sound reduction up to 45 to 50 dB for busy commercial environments. Learn more in our acoustic soundproof glazing guide.
- Accreditations & Insurances: Our operations are backed by £5,000,000 Public Liability, £10,000,000 Employers Liability, and Environment Agency upper-tier waste carrier registration CBDL650268. Verify all credentials on our statutory certificates page.
Inspect real project metrics and on-site delivery walk-throughs across our commercial case studies, browse completed work in our recent projects directory, consult our trade-certified installers overview, and read more about our company.
Frequently Asked Questions About Commercial Glazing
What contract forms do you operate under for commercial glazing packages?
We operate under standard JCT (Design and Build, Minor Works, Intermediate) and NEC3/NEC4 subcontract terms. We provide itemised valuations, structured applications for payment, and formal Inspection and Test Plans (ITPs) coordinated with the principal contractor quantity surveyor.
Can you supply labour-only or installation-only teams for client-procured systems?
Yes. Operating as an installation-only glazing company when required, we supply dedicated installers teams only. Our CSCS-certified glazier teams and SSSTS site supervisors fit client-supplied systems on a labour-only or installation-only basis, including Kawneer, Schüco, Reynaers, Velfac, Senior, Smart, and commercial uPVC window schedules.
How do you manage site safety and CDM 2015 regulations on active sites?
Prior to site mobilisation, our compliance team submits comprehensive site-specific RAMS, lift plans, and COSHH assessments. Daily works are supervised by SSSTS-certified supervisors who lead daily toolbox talks and enforce mandatory 5-point PPE protocols.
What are your typical mobilization lead times for commercial packages?
For labour-only site installation teams, we can mobilise within 1 to 2 weeks following RAMS approval and site induction scheduling. For complete supply-and-fit aluminium facade and curtain walling packages, profile fabrication and glass delivery typically require 6 to 10 weeks from approved survey sign-off.
What insurance coverage does Window Fitters Ltd carry for commercial work?
We carry £5,000,000 Commercial Public Liability insurance and £10,000,000 Employers Liability insurance. Certified broker schedules and policy verification letters are supplied as standard within our commercial tender return packs.
How is weather tightness and quality verified on commercial curtain walling?
Quality is audited through progressive Inspection and Test Plans (ITPs) covering bracket torque, EPDM lap sealing, pressure plate torque verification, and calibrated CWCT on-site hose spray bar testing before final handover.
Submit Tender Drawings or Request a Commercial Consultation
To submit bills of quantities, window schedules, or architectural elevations for competitive commercial tender pricing, contact our commercial estimating department:
- Telephone our commercial office on 020 3411 0589 to discuss project scheduling, capacity, or site access.
- Send drawings, window schedules, or urgent site photos via WhatsApp for fast trade review.
- Submit formal tender documents and specifications by email to info@windowfitters.uk.
- Request an initial estimate or site survey through our online commercial quote request form.
Author & Technical Reviewer: Marian Gheorghe
Head Installer & CEO, Window Fitters Ltd
Marian Gheorghe is the Active Director and Team Leader Installer at Window Fitters Ltd. With over 15 years of hands-on experience, he oversees technical safety and UK Building Regulations compliance for all residential and commercial glazing contracts.
Ready to discuss your project?
Window Fitters Ltd provides window and door installations across London and Surrey for residential, trade, and commercial projects.
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Verified Google & MyBuilder Reviews
"Stunning Sash Windows in Croydon"
"Marian and his team replaced our old Victorian sash windows. They were clean, fast, and the double glazing has completely blocked out the street noise. Highly recommended!"
"Excellent Bifold Doors in Bromley"
"Installed beautiful grey aluminium bifold doors for our new kitchen extension. Smooth gliding mechanism and great insulation. The best quote we got in Kent."
"Perfect Front Door Upgrade in Sutton"
"Very happy with our new composite door installation. Excellent lock security and high-quality GRP slab finish. Fast half-day fitting and no mess left behind."