Skylight Window Installation, Replacement & Repair in London

Enhance your home by bringing more natural light, improved ventilation, and energy efficiency through Smart Roofing London‘s complete skylight window services. 

We specialize in skylight window installation, replacement, and repair services across Greater London, including Barnet, Tottenham, Hackney, Fulham, Notting Hill, and beyond.

Whether you’re renovating your loft, planning a kitchen extension, or replacing an outdated skylight, our local skylight installers offer affordable, high-quality solutions tailored to your property’s needs. 

We install both flat roof skylights and pitched roof skylight windows, ensuring each installation is built to last and fully compliant with London Building Regulations.

We can choose from energy-efficient skylight windows, stylish roof lanterns, or cheap skylight windows—all installed with precision and care by our certified professionals.

At Smart Roofing London, we don’t just install windows; we enhance your home’s aesthetic value and help you save on energy bills. 

Our comprehensive service includes everything from free design consultation to installation, waterproof flashing, and ongoing maintenance.

Recently, we have worked on numerous roofing projects such as roofing services in Hendon, which involved seamless integration of a modern skylight system. 

Contact us today for a free skylight window survey and discover how our skylight solutions can transform your home!

Skylight Window Installation Services in London

Transform your home with our expertly installed skylight windows from Smart Roofing London—the trusted name in skylight window installation across Greater London. 

Whether you’re extending your home or adding natural light to a flat roof conversion, our local skylight installers provide tailored solutions that bring beauty, energy efficiency, and fresh air into your living space.

Our installation services include:

  • Flat roof skylights & roof lanterns: Ideal for modern home extensions, flat roof skylights and bespoke roof lanterns flood rooms with natural light, creating open, airy spaces while boosting property value. 

  • Pitched roof skylights & roof windows: For homes with sloped roofs, we install VELUX-style pitched roof skylights that seamlessly integrate into your roofline, enhancing your loft or attic conversions. 

  • Opening & ventilated skylights: Our ventilated skylights, available in manual or remote-controlled options, help improve air circulation and prevent condensation, dampness, and mold. They’re perfect for kitchens, bathrooms, or any room requiring fresh airflow.

  • Energy-efficient skylight windows: Our energy-efficient skylights feature low-E glazing, insulated flashings, and thermally broken frames that help reduce energy costs by retaining warmth in winter and blocking heat in summer. 

  • Bespoke skylight extensions & rooflight design: Looking for something unique? We design bespoke skylight extensions and linear rooflights that add an architectural flair to your home, improving both natural lighting and aesthetic appeal.

With over 25 years of experience, our certified skylight installers ensure every installation meets UK Building Regulations for safety, energy efficiency, and better performance. 

Whether you’re interested in affordable flat roof skylights or luxury roof lanterns, we offer transparent pricing, expert installation, and 100 % customer satisfaction guarantees.

Our recent projects, such as the roof installation in Neasden and the roof installation in Willesden, demonstrate our versatility in roofing, where we also included tailored skylight windows as part of the solution.

Ready to bring more light into your home?

Call us now or book your free skylight survey today to explore the best options for your space.

Installation of a skylight window on a pitched roof in London by Smart Roofing London, showing new flashing detail and slate integration.

Skylight Window Repair Services in London

If your skylight window is leaking, fogging up, or letting in drafts, Smart Roofing London is always near you to help. 

We offer fast, reliable skylight repair services throughout Greater London, including Barnet, Hackney, Notting Hill, Fulham, Wembley, and beyond. Our team specializes in diagnosing and fixing common skylight problems to keep your home protected.

Common skylight issues we repair:

  • Leaks & water ingress: We identify and fix issues like cracked flashings or failed seals using top-quality waterproofing materials.

  • Condensation & misted glazing: Our expert team replaces faulty double glazing to restore clarity and improve insulation.

  • Cracked or broken glass: We replace damaged skylight glass safely and efficiently.

  • Faulty openings & ventilation: If your skylight isn’t opening or closing correctly, we repair or replace hinges, handles, and mechanisms.

  • Worn flashings & seals: We restore proper weatherproofing to prevent leaks and extend your skylight’s life.

A leaking or damaged skylight can cause severe interior damage, so we act quickly. 

With transparent pricing, certified repairs, and guarantee-backed service, we’re committed to providing long-lasting solutions.

Our recent flat roof repair service in Hounslow included skylight servicing and fixing related issues where we repaired skylights correctly at an affordable price.

Notice a leak or moisture around your skylight?

Call us 24/7 across London for immediate, reliable service.

Skylight Window Replacement Services in London

When we see the skylight window deteriorating heavily, skylights over 15-20 years old or when repairs are not cost-effective. 

Smart Roofing London offers professional skylight replacement services across Greater London, helping homeowners upgrade to modern, leak-proof, and energy-efficient skylights. 

Whether you have a flat roof skylight, pitched roof skylight window, or roof lantern, our certified teams ensure your new skylight improves natural light, reduces heat loss, and enhances your home’s comfort.

Our skylight window replacement services include:

  • Stop leaks: New flashings and seals prevent recurring water ingress.

  • Energy savings: Low-E glazing, thermally broken frames, and argon gas fill maintain consistent indoor temperatures throughout year.

  • Better ventilation & comfort: Upgrade to manual or electric skylights for improved airflow and reduced condensation.

  • Modern aesthetics: From affordable skylight windows to premium roof lanterns, refresh your home’s appearance.

  • Compliance & peace of mind: All replacements meet Building Regulations.

We handle everything from the free survey and product recommendations to fixed-price quotes, safe removal, and professional installation. Most replacements are completed in just one day, with minimal disruption to your daily life.

Our recent roofing projects in Neasden and Willesden also involved skylight replacements, where we delivered seamless roof and window upgrades.

Ready to upgrade your skylight?

Get a free quote now and enjoy improved energy efficiency and comfort!

Flat roof skylight window replacement in London by Smart Roofing London, ensuring improved insulation and leak protection.
Pitched roof skylight window replacement in London by Smart Roofing London, enhancing light and energy efficiency.

Our Installation Process

1. Free Consultation & Site Survey: 

  • Assess the roof type and the structure of the roof.
  • Discuss your light and ventilation needs.
  • Review planning permission requirements for any extension.
  • Measure the space for accurate fitting.
2. Preparation and Planning:
 
  • Locate the perfect spot for the sky window, ensuring it’s structurally sound. 
  • Mark the position for the skylight inside the room. 
  • Prepare tools and materials, including the window, flashing kit designed for the specific roofing material, and necessary fasteners. 
3. Structural Work:
 
  • Support the roof rafters by fitting header joists perpendicular to the existing rafters, creating a strong frame for the opening. 
  • Cut out the hole for the sky window, ensuring all edges are level and even, using a circular saw. 
  • Cut back the existing roofing material, like shingles or tiles, to expose the necessary area around the opening. 
4. Window and Flashing Installation:
 
  • Position and secure the window frame into the framed opening, using screws or nails into the battens. 
  • Install the flashing kit, which is crucial for a watertight seal. 
    • Apply underlay roofing paper strips to allow water to escape. 
    • Install bottom flashing around the base of the skylight and top of the shingles. 
    • Fit step flashing pieces under the roof shingles on the sides, overlapping them to prevent leaks. 
5. Finishing the Installation:
 
  • Insert the window sash into the frame and secure it properly.
  • Install the internal lining, which improves insulation and prevents moisture from entering the space around the window.
  • Finish the interior plaster work to close the opening around the new sky window.
  • Clean up the work area thoroughly after installation.

Areas We Proudly Serve across London

Why Choose Smart Roofing London?

At Smart Roofing London, we pride ourselves on being local skylight window experts with a deep understanding of London’s unique weather and property challenges.

Here’s why clients trust us:

  • Fully licensed, certified, and insured roofing experts.
  • Family-run business with 25 years of experience and a reputation built on trust.
  • Fast response times and 24/7 emergency availability.
  • Premium quality materials from certified and reputable suppliers, ensuring longevity and performance.
  • 100% customer satisfaction guaranteed.
  • Free consultations and clear, competitive quotes with no hidden fees.
  • 100% guaranteed workmanship for peace of mind.

Ready to fix your skylight window? Contact us today for a free, no-obligation quote or consultation.

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FAQ's

1. How do I know which type of skylight is best for my home?

The best skylight for your home depends on your roof type and aesthetic preferences. We offer guidance on the best skylight options for flat roofs, pitched roofs, and new-build properties. Our team will ensure the perfect match for your needs.

Regular cleaning and maintenance are key to keeping your skylight functioning properly. We offer routine inspections and maintenance services to ensure your skylight remains leak-free and efficient.

If you want certified, well-reviewed skylight installers in London, check and compare quotes, check insurance and past work, and ensure compliance with UK building regulations.

4. How much does skylight installation cost in London?

The cost depends on the skylight type, roof structure, and glazing option. Basic flat roof skylights or VELUX-style roof windows start affordably, while roof lanterns or custom skylight extensions cost more.

If your skylight is over 15 years old, foggy, cracked, or leaking despite repairs, replacement is more cost-effective. We provide skylight replacement in London using energy-efficient materials and secure flashing systems.

Most single skylight installations take 1 day, while larger roof lanterns or structural skylights may require 2–3 days. We give a clear schedule upfront and complete work cleanly and safely.

Call us today!

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