Our 5-Step Window & Door Installation Process
At Window Fitters Ltd, we want you to feel confident and informed at every stage of your home improvement. We have refined our installation process into five clear steps to ensure precision, transparency, and a clean workspace from initial contact to the final handover.
1. Initial Consultation and Itemized Quote
Your project begins when you request a free consultation. We discuss your architectural ideas, insulation needs, and budget. Our team will provide an initial, transparent estimate based on your preliminary dimensions or drawings. We do not use high-pressure sales tactics; we provide honest, itemized quotes so you can make your own decisions.
2. The Technical Survey
Once you are happy with the estimate, one of our experienced surveyors will visit your property. Precise measurements are crucial for fenestration because a window frame must fit its brickwork opening within millimetres. Our surveyor also inspects the structural openings and lintels, checks load-bearing requirements, and identifies any local planning constraints. For example, we check if your property is in a conservation area that requires specific frame finishes or sightlines. To speed up this stage, you can use our Window & Door Survey Designer to upload your drawings, map your openings, and prepare your measurements digitally before the site visit.
3. Sourcing and Custom Fabrication
After the survey, your window and door dimensions are finalized for manufacturing. Here, you have two options depending on your chosen service path:
- "Supply and Fit" Service: We source custom-made frames and double or triple glazing directly from leading UK fabricators at competitive trade rates. This ensures the products meet all local building regulations and carry our long-term guarantees.
- "Installation Only" Service: If you prefer to buy your own window frames or bifold doors independently, we coordinate the delivery dates and prepare to fit your supplied units.
4. Installation Day
On the scheduled installation day, our fitting team arrives in company vehicles. Our priority is to protect your property and complete the work with minimal disruption:
- Preparation: We lay protective floor runners and dust sheets over your carpets and furniture.
- Removal: We carefully remove the old window frames to prevent damage to the surrounding plaster and brickwork.
- Fitting & Insulation: We install the new frames, ensuring they are perfectly level, plumb, and square. We pack and insulate the perimeter cavities to prevent thermal bridging and drafts.
- Sealing & Trim: We apply high-grade external silicone seals and neat internal trims, creating a weather-resistant barrier.
5. Quality Inspection and Handover
After cleaning the work areas, our lead installer will walk you through the completed project. We demonstrate the operation of all security locks, restrictors, and hinges. We also explain how to clean and maintain your new glazing. Once the project is signed off, we coordinate any necessary building control certificates, ensuring your new installation is fully registered and compliant with current UK energy regulations.
Book a free site survey. No obligation, no pressure.
Window Fitters Ltd installs windows, doors, fire doors, and commercial glass facades across London and Surrey. Croydon head office, 40-mile service radius, 100% directly employed CSCS-carded fitters.
Our estimators respond within 24 business hours with a fixed-price quotation.
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."