Skylight Window Repairs
We don’t just repair skylight windows — we restore them with care, precision, and pride.
Natural light transforms a room—but when a skylight starts leaking, fogging up, or refusing to close properly, it becomes a source of stress rather than sunlight. At GC Doors, we provide expert skylight window repairs designed to restore comfort, protect your property, and maintain the architectural integrity of your space.
We work on all types of skylights and roof windows, including fixed, opening, vented, electric, and manual systems—across both flat and pitched roofs. Whether your window is timber, aluminium, or uPVC-framed, our experienced engineers will diagnose the issue and deliver a high-quality repair that gets your window performing as it should.
From modern homes and loft conversions to commercial buildings and period properties, we understand how important your skylight is—not just for daylight, but for insulation, ventilation, and peace of mind. That’s why we focus on reliable repairs that extend the life of your existing installation and help prevent costly future damage.
Skylight Windows
Fixed Skylights
Fixed skylight windows are designed to do one thing exceptionally well: bring in natural light. Because they don’t open, they’re often assumed to be problem-free—but over time, they can still develop issues like internal condensation, glazing failure, or perimeter leaks.
We’ve restored countless fixed skylights that had become fogged, cracked, or poorly sealed—returning clarity and peace of mind to our clients without the need for full replacement.
Manually Operated Skylights
Found in many older properties, manually operated skylights typically open with a hand crank, winder, or telescopic pole. These windows are charming in their simplicity, but age, weather and wear can make them difficult to open or close, or allow draughts and leaks to creep in.
We carefully restore their moving parts, recondition timber or frame materials, and replace seals and handles—keeping the practicality while refreshing the performance.
Electric and Solar-Powered Skylights
Sleek, quiet, and increasingly common in contemporary builds, electric skylights add convenience and comfort—until the motor stops working or the rain sensor misbehaves.
These systems require careful, informed repair to avoid damaging internal components or compromising automation features. Our team is trained to diagnose faults quickly and carry out professional repairs that maintain the convenience you expect from a modern installation.
Flat Rooflights and Domed Skylights
Skylights on flat or low-pitched roofs, such as domes and frameless rooflights, are common in kitchens, commercial spaces, and hallways. These units are often more exposed to rain, pooling water, and debris—meaning sealant failure and glazing damage can happen more quickly.
Whether it’s a cracked polycarbonate dome, a leaking frame, or a failed double-glazed unit, we carry out precise repairs that restore function without compromising your flat roof system
Skylight Window Repairs Services
Skilled Repairs. Bright Results. Reliable Craftsmanship.
Natural light changes everything—but when your skylight window starts to leak, mist up, or jam, it can quickly turn from a design feature into a problem. At GC Doors, we specialise in professional skylight window repairs that restore both performance and peace of mind. Whether you’re dealing with a draughty frame, water ingress, broken glass, or a failed mechanism, we offer a tailored, expert service that gets your window working as it should—bright, functional, and weather-tight.
We work across all property types, including homes, loft conversions, offices, commercial spaces and extensions. No matter the shape, size, or material of your skylight, our team brings years of experience, precision workmanship, and a “repair first” approach to every job.
🔧 Leaks and Water Ingress
Water leaking from a skylight can quickly lead to damp patches, peeling paint, and internal damage. We don’t just apply sealant and walk away—we conduct a detailed inspection to identify the real source of the leak, whether it’s degraded flashing, a cracked frame, or failed glazing seals. Our repairs are watertight, durable, and designed to hold up in all seasons.
🌫 Misting or Internal Condensation
Foggy or misted skylights often signal that the sealed glazing unit has failed. Not only does this obscure your view of the sky, but it also reduces the insulating properties of your window. We replace failed double or triple-glazed units with high-performance glass options that restore thermal efficiency and visual clarity.
🪟 Mechanism and Operation Issues
If your skylight no longer opens, closes, or locks as it should, we’ll assess the mechanics—whether manual or electric—and repair or replace handles, hinges, struts, and control arms. We also service automated and solar-powered units, ensuring smooth, reliable performance.
❄️ Draughts, Rattling and Poor Insulation
Older or poorly installed skylights can let in cold air, cause heat loss, or rattle in the wind. We reseal and insulate units, repair weatherstripping, and adjust fittings to restore a tight, secure seal that improves comfort and efficiency.
🛠️ Frame Decay and Surface Damage
For skylights with timber frames, rot and surface wear are common over time—especially in bathrooms, kitchens, and older properties. We repair damaged timber using splicing, resin infills, and high-quality paint or stain finishes. For aluminium and uPVC skylights, we repair scratches, fading, or cracks in the frame using colour-matched materials for a clean, seamless look.
Upgrade Options Available
When Repair Isn’t Enough, We Offer Thoughtful, Long-Lasting Solutions
While we always prioritise repair wherever possible, there are situations where an upgrade is the most practical and future-proof solution. Some skylights are simply too old, too damaged, or no longer meet modern standards for insulation, safety, or usability. In these cases, GC Doors offers a range of professional upgrade and replacement options that improve comfort, performance, and energy efficiency—while keeping your home’s look and feel intact.
Whether you’re dealing with persistent leaks, failed glazing units, difficult-to-use mechanisms, or just want to improve how your space looks and feels, our team will guide you through every step of the upgrade process.
Full Skylight Window Replacement
We supply and install new skylight units tailored to your roof structure and aesthetic preferences. Whether you need to replace a like-for-like model or are exploring a different style or opening method, our installations are seamless, efficient, and fully weatherproofed. We remove the old unit safely, inspect and prepare the opening, and fit the new window with precision and care.
Upgrade to Energy-Efficient Glazing
Older skylights often use single glazing or outdated sealed units that allow excessive heat loss or solar gain. We upgrade to high-performance double or triple glazing with options such as low-E coatings, self-cleaning glass, and solar protection. The result is better insulation, reduced energy bills, and improved interior comfort.
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.