Interactive Glazing Demonstrations & Security Mechanics
While our video guides are in production, we have created these interactive visual animations to demonstrate the core physics and security mechanics of our high-performance glazing systems. For example, see exactly how double glazing keeps heat inside, and how multi-point locks protect your home. Whether you opt for a full "Supply and Fit" service or an "Installation Only" project, these same high-quality security mechanics apply.
Our installations comply strictly with UK Building Regulations, including Document L (insulation), Document K (safety glass), and Document F (ventilation), and we coordinate directly with building control to ensure your project is certified.
Triple Glazing Simulation (A++ Rated)
Triple glazing features three panes of Low-E safety glass enclosing two independent Krypton or Argon gas cavities. Thermal energy bounce-back is near instantaneous, reducing U-values down to ultra-low 0.8 W/m²K while providing superior acoustic insulation.
Multi-Point Hook Locks
Unlike standard latch locks, our doors feature massive steel hooks that slide and clamp tightly into steel keepers in the frame. Lifting the handle engages the hooks, making it virtually impossible to pry the door slab from the frame.
Want to see our completed projects? Visit our Project Gallery, check out our window installation options, or contact us for a professional Security Hardware & Locks survey.
Explore our technical specification calculators in our interactive tools, browse completed installations in our project gallery and recent projects, read client reviews in our customer testimonials, review technical walkthroughs in our case studies, and explore our full installation services directory.
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.
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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. You can also message our estimators on WhatsApp to share photos and measurements.
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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."