Professional Door Installers & Fitters | London & Surrey

Professional Door Installers & Fitting Services

Welcome to Window Fitters Ltd, your trusted local door installation specialists. With over 10 years of experience in the glazing and carpentry trade, we deliver high-security front entrance doors, modern aluminium folding doors, and certified fire doors for residential and commercial properties. Based in Croydon, our skilled installers serve London, Surrey, and surrounding areas (within a 40-mile radius), providing absolute direct accountability and exceptional attention to detail.

Complete Sourcing Flexibility: Supply & Fit or Installation Only

We believe in giving our clients complete operational control over their home improvements. Homeowners, builders, and developers can choose between our comprehensive Supply and Fit service (where we survey, help you source the perfect doorset from top UK trade fabricators, and complete the installation) or our labour-only Installation Only package to fit doors you have already purchased independently. For example, we frequently help homeowners fit custom timber doors or bespoke aluminium sliding systems they sourced elsewhere. To view our standard packages, check our contracts and our process pages.

Our Extensive Doorset Range

Our experienced door fitters supply and fit a diverse array of interior and exterior doors custom-sised to fit your structural openings:

• Composite Entrance Doors: Solid-timber core front doors offering superior thermal insulation and advanced security.
• Aluminium Bifold Doors: Slimline folding patio doors that connect your living room to the garden. Learn about our bifold door installations.
• French & Patio Doors: Classic double-glazed doors that flood your home with light. View our French door fittings.
• Fire Doors: Building regulation compliant FD30 and FD60 safety doorsets. View our fire door services.
• Internal & specialised Doors: Pocket doors, timber panel doors, sliding barn doors, and custom pet flap installations.

Uncompromising Security, Draught-Proofing & Weather Stripping

A door must do more than look good; it must protect your home from both intruders and the British weather. Our installers fit heavy-duty multi-point hook locks, anti-snap key cylinders, and robust handles as standard. Every exterior door installation we perform includes the fitting of high-performance weather stripping, threshold draught excluders, and compression gaskets to ensure a wind-tight, water-resistant seal.

Building Regulations, Site Safety & Certification

All door installations we execute comply with the latest UK Building Regulations, ensuring proper thermal efficiency (Document L) and safety glazing in critical areas (Document K). FENSA registration does not cover standalone door installations or fire door assemblies, which means we do not self-certify. Instead, we coordinate directly with local authority building control departments or private inspectors, submitting all drawings and specifications to secure official building control sign-off.

For site safety, our directly employed installers operate under CDM 2015 regulations, using detailed Risk Assessments and Method Statements (RAMS). Our operations are fully protected by a £5,000,000 public liability insurance policy. For safety details, visit our safety measures page.

Transparent Estimates & Professional Fitting

We provide clear, detailed estimates without hidden costs. During your technical site survey, our estimator will take precise measurements and help you select the ideal door and hardware configuration for your budget. On fitting day, our team will deliver the doors, protect your flooring, remove and safely dispose of your old doors, and complete the installation, leaving the work area clean and tidy.

Ready to upgrade your home's security and curb appeal? Use our interactive Window & Door Survey Designer to upload your drawings, or contact Window Fitters Ltd today to discuss your project, confirm coverage on our location page, or schedule a technical survey.

Door Fitting FAQs

How long does it take to install a new front door?

A standard composite entrance door installation typically takes 3 to 4 hours, including removal of the old door, fitting the new frame, adjusting multi-point locks, and applying weatherproof sealant. Bifold and sliding door systems take longer - usually a full day depending on the number of panels.

Do you fit fire doors for residential properties?

Yes. We install FD30 and FD30S fire doorsets for flats, HMOs, and residential conversions. All fire door installations comply with Document B (Fire Safety) and are fitted with intumescent strips, cold smoke seals, and self-closing mechanisms. View our dedicated fire door installation page for full details.

What security standards do your doors meet?

All our external doors are fitted with PAS 24 / Secured By Design compliant hardware as standard, including multi-point hook locks, anti-snap cylinders, and reinforced hinges. This meets the current Document Q requirements for forced-entry resistance.

Can you fit doors that I have already purchased?

Absolutely. Our Installation Only service is specifically designed for this. Whether you have sourced your own composite doors, bifold systems, or bespoke timber doors, our experienced fitters will handle the professional installation.

What is included in your door fitting price?

Our Supply and Fit pricing includes the doorset, all hardware (locks, handles, hinges), weather stripping, threshold seals, professional fitting, removal and disposal of the old door, and a 5-year manufacturer warranty. We provide a fully itemised quote with no hidden extras.