Qualified Window Fitters & Professional Door Installers
Window Fitters Ltd provides directly employed, qualified window fitters, door installers, door fitters, and glazing fitters for commercial main contractors, residential developers, and homeowners throughout London, Surrey, and Croydon. Backed by over a decade of fenestration experience, our installation teams deliver precision fitting with zero reliance on unvetted agency labour.
Directly Employed Glazing & Window Installation Teams Across London & Surrey
Our fitters operate under strict trade guidelines, ensuring every window frame, glass unit, and door assembly is plumb, square, anchored securely, and sealed against weather ingress.
Experienced Window Fitters for uPVC, Timber & Aluminium Frames
Our window fitters are skilled in installing a wide variety of profile systems, including A-rated uPVC casements, vertical sliding sash windows, tilt-and-turn units, and architectural aluminium frames. We execute clean removal of legacy frames, fit expanding foam thermal seals, and finish with high-grade perimeter masticing.
Specialised Door Installers for Entrance & Patio Assemblies
Our dedicated door installers handle composite entrance doors, bi-folding garden doors, multi-panel sliding patio screens, and commercial doorsets. We adjust hinge geometry and lock toe-and-heeling to ensure effortless latching and long-term mechanical reliability.
CSCS Accredited Operatives & 100% Direct Employment Guarantee
Every glazier and installer on our team holds a valid CSCS card, completes routine health and safety refresher courses, and adheres strictly to CDM 2015 site governance. Our 100% direct employment guarantee ensures complete accountability on every job site.
Building Control Sign-Off & Regulatory Standards (Document L, F & K)
All installation work by our window fitters complies with UK Building Regulations. We audit thermal boundary placement under Document L, safety glazing requirements under Document K (BS EN 12150), and background ventilation under Document F.
Certified Installation Auditing & Building Regulations Completion
We work directly with Local Authority Building Control (LABC) or approved private inspectors to arrange site verification and issue legal Building Control Completion Certificates for project records.
Subcontract & Commercial Installation Options for Developers
For B2B main contractors and commercial housebuilders, we offer flexible subcontract fitting arrangements under standard JCT terms, backed by £5,000,000 Commercial Public Liability Cover.
Dedicated Site Supervision & Transparent Daily Schedule Planning
Our site supervisors issue comprehensive Risk Assessments and Method Statements (RAMS) before starting work, coordinate logistics offloading, and ensure fitting progress aligns perfectly with main contractor construction schedules.
Frequently Asked Questions: Window Fitters & Installers
Are your window fitters and door installers directly employed?
Yes. 100% of our window fitters and door installers are directly employed by Window Fitters Ltd. We never use unvetted temporary agency labour, ensuring high standards of workmanship and site safety.
What credentials do your glazing fitters hold?
All team members hold valid CSCS cards, undergo regular health and safety training, and carry full £5,000,000 Public Liability Insurance for residential and commercial sites.
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. He directly supervises our trade fitting workforce, ensuring every installer adheres to strict site safety rules, UK Building Regulations, and neat finishing standards.
Contact us today to schedule a free survey.
We will work with you to choose the right door and window for your needs and budget, and then we will professionally install it.
Window Fitters Ltd is a specialist double glazing installation company serving London and Surrey since 2016. With our services, you can rest assured that you're getting the best value for your money.
We would be happy to discuss your needs and
provide you with free advice.
Our team will answer any questions you may have or help you choose the right installation service for your home or business.
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."