Aluminium Window Repairs
Restoring Aluminium Windows with Skill, Strength, and Care. We fix the problems you see—and prevent the ones you don’t.
At GC Doors, we specialise in the expert repair and restoration of aluminium windows across residential properties and commercial developments. Aluminium systems are designed for strength, performance, and longevity—but even the highest-quality installations can suffer from wear, damage, or mechanical faults over time.
We deliver tailored repair solutions for everything from modern thermally broken windows in private homes to large-scale curtain walling and architectural glazing in commercial buildings. Our team understands the specific demands of both domestic and commercial aluminium systems, ensuring repairs that restore full functionality, improve energy efficiency, and preserve the sleek, minimal design aluminium windows are known for.
Whether you require a simple adjustment or comprehensive remedial work across a property portfolio, GC Doors offers a professional, detail-driven service trusted across London and the surrounding areas.
Aluminium Windows
Side-Hung and Top-Hung Casement Windows
Common in both residential and commercial properties, casement windows open outward from side or top hinges. Over time, friction hinges, stays, and locking mechanisms can wear or misalign. We repair alignment issues, replace faulty hardware, and restore smooth, secure operation—while preserving the frame’s integrity.
Tilt-and-Turn Windows
Tilt-and-turn windows offer dual opening functionality—tilting inward for ventilation and swinging fully open for access and cleaning. These complex mechanisms can develop faults if not maintained. Our specialists diagnose and repair multi-point locks, gearing failures, and sealing issues, restoring full and reliable movement.
Sliding Aluminium Windows
Sliding aluminium windows provide practical access and a clean, minimal aesthetic. However, worn rollers, misaligned tracks, and seal failures can cause sliding problems and air leakage. We restore smooth sliding action, replace damaged rollers, and reseal where necessary to reinstate full functionality.
Curtain Wall and Structural Glazing Systems
Used predominantly in commercial settings, curtain walling and structural glazing demand technical precision for any repairs. We work with building owners and property managers to address issues such as leaks, faulty opening vents, and damaged seals—carrying out repairs safely, discreetly, and in line with building regulations.
Aluminium Window Repairs Services
Specialist Repairs That Restore Performance, Efficiency, and Ease of Use
Aluminium windows are known for their durability—but like all systems, they require maintenance and occasional repair. At GC Doors, we provide expert, targeted repairs that address everything from routine wear to more complex operational faults. Whether the issue lies in the hardware, the frame, the glazing, or the seal, we take the time to diagnose the root cause and deliver lasting, high-quality solutions.
We carry out repairs on all major aluminium window systems—residential and commercial—ensuring minimal disruption, discreet finishes, and restored performance with every job.
🔧 Mechanism & Hinge Repairs
Tilt-and-turn hardware, casement hinges, and friction stays are common failure points, particularly with regular use. We realign and replace moving parts to ensure your windows open and close smoothly, lock securely, and stay in place when opened for ventilation or cleaning.
🔒 Locking & Handle Repairs
When a handle breaks or the lock stops engaging properly, it can affect both security and usability. We service and upgrade locking mechanisms, from simple handles to multi-point locks—ensuring you can operate your windows safely and confidently.
🌬 Seal & Draught-Proofing Repairs
Seal failure is one of the most common issues we address. If your aluminium windows let in cold air, water, or outside noise, we replace worn gaskets, reseal junctions, and ensure a consistent airtight finish—improving comfort and energy efficiency throughout your space.
🛠 Frame Adjustments & Realignment
In both domestic and commercial buildings, aluminium frames may shift over time due to structural settling or temperature fluctuations. This can cause misalignment, dragging, or gaps between the sash and frame. We carry out careful adjustments to restore proper operation and weather-tightness without the need for full replacement
🪟 Glazing Replacement & Unit Repairs
If your glass is cracked, misted, or no longer insulating effectively, we replace failed double or triple-glazed units without disturbing the original frame. Our replacements match your window’s existing design and can also upgrade performance with acoustic, solar, or energy-efficient glazing options.
🧼 Cosmetic & Surface Repairs
While aluminium frames are tough, they’re not impervious to wear. We treat light surface damage, touch up minor corrosion or scratches, and restore the original finish with colour-matched repairs—especially important for commercial units and high-visibility locations.
Upgrade Options Available
When Repairs Aren’t Enough, We Offer Smarter Long-Term Solutions
At GC Doors, we believe in restoring what can be repaired—but we also understand that some aluminium windows reach the end of their serviceable life. When frames are warped, glazing is outdated, or hardware is no longer compatible with current safety and performance standards, a targeted upgrade can be the most efficient way forward.
We offer a range of custom aluminium window upgrade options, tailored to meet the needs of both residential and commercial properties. Whether you want improved thermal performance, a more contemporary appearance, or a complete system refresh, our upgrades are designed for durability, efficiency, and architectural integrity.
Full Window Replacement
When a window system is beyond practical repair, we supply and install new aluminium windows, made to measure and professionally installed. Ideal for replacing corroded frames, outdated single-glazed units, or legacy systems that no longer meet current building standards.
Our replacements are: Thermally broken for improved energy performance. Built with slimline, architectural profiles. Available in a wide range of RAL colours and finishes. Compliant with current UK building and glazing regulations
Glazing Upgrades
If your window frames are still structurally sound, but the glazing is inefficient or showing signs of failure (e.g., misting or poor insulation), we offer glass-only replacements with modern, high-performance options, including:
Low-E (low-emissivity) glass for thermal efficiency. Acoustic glass to reduce noise in urban or roadside settings. Solar-control glass to minimise glare and overheating. Laminated or toughened safety glass for security and compliance
Professional Sash Window Repair Services in London
Schedule an Inspection
Before starting any job involving the installation, repair, or upgrade of windows and doors, we perform a thorough initial inspection visit. This preliminary step is fundamental to ensuring that each project is executed smoothly and efficiently.
An initial inspection visit provides a critical foundation, allowing us to gather essential information, identify potential issues, and develop a comprehensive plan tailored to your specific needs. Inspection Visits are more than just a formality; they are key to ensuring a well-planned and tailored approach.
Our Customer Promise
Your trust means everything to us — and we work hard to earn it, keep it, and honour it in everything we do. That’s our promise.
At GC Doors, we don’t just supply, install and repair windows and doors — we create experiences that are smooth, reliable, and built on trust. From first enquiry to final sign-off, we’re committed to making your journey with us as straightforward and stress-free as possible.
We understand that every project, whether large or small, represents a meaningful investment. That’s why we treat every customer with respect, listen carefully to your needs, and tailor our approach to meet your goals.
Clear and Honest Communication
We believe in transparency from day one. You’ll always know what to expect — from timelines and pricing to next steps and project updates. We keep you informed at every stage and are always available to answer questions, offer guidance, and provide honest advice.
Professionalism at Every Step
Our team shows up on time, treats your space with care, and works efficiently to get the job done right. We hold ourselves to high standards — not just in our work, but in how we carry ourselves, how we communicate, and how we follow through.
Tailored Advice and Smart Solutions
We take the time to understand your needs and recommend the best products and approaches to suit your space, style and budget. Whether you’re after sleek Sicilian aluminium frames or a reliable repair, we’ll help you make informed decisions with confidence.
Precision and Quality Craftsmanship
Every detail matters. From the accuracy of our measurements to the finish of each installation, we take pride in delivering results that not only look great but perform exceptionally for years to come.
No Surprises – Just Fair, Transparent Pricing
We provide clear, detailed estimates with no hidden costs. We respect your budget and work with you to find the right balance between quality, performance, and affordability.
Ongoing Support and Aftercare
Our service doesn’t end when the job is done. If you have a question, concern, or need support after installation, we’re just a call away. We stand behind our work and are committed to your long-term satisfaction.
Reviews
Leading experts in window and door installation and repairs in London and surrounding areas — but don’t just take our word for it. Read our reviews from satisfied customers who trust us for their window and door installations and repairs. We are committed to providing quality service and ensuring your home or business is secure, functional, and aesthetically enhanced.