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Upgrade Your Home with a Premium Double Glazed Rooflight
Improve your property’s thermal efficiency and bring more natural daylight using high-performance double-glazed rooflights, professionally measured and installed by Bowalker’s dedicated in-house team. Featuring advanced insulating dual-pane glass and durable structural frames, every double-glazed rooflight installation we complete is fully certified under our FENSA registration (33081) and backed by a comprehensive 10-year insurance-backed guarantee.
- Dimensions Max size 2.5M high x 1.5M wide
- Thermally Broken As standard
- Glass Double Glazed
Certifications and Partners
Professional Double Glazed Rooflight Installation Services
As a trusted double-glazed rooflight professional serving the UK since 2009, Bowalker has been delivering professional installation and replacement services for homeowners aiming to flood flat-roof extensions, kitchens, and living spaces with abundant natural daylight. Our dedicated in-house double-glazed rooflight installation team handles comprehensive property surveys and expert installations, ensuring rooflight dimensions, insulating glass units, and thermal frames are precisely tailored to the building’s roof structure and aperture.
Double-glazed rooflight installations feature robust dual-pane glass units, advanced thermal spacer bars, and secure weather-tight curbs designed to shed rainwater efficiently and withstand severe UK weather conditions. These components combine to deliver reliable year-round thermal efficiency, effective reduction of heat loss, and dependable overhead illumination without compromising structural integrity.
Call Bowalker on 01444 810 111 to schedule a free consultation for your double-glazed rooflight installation or replacement. Our experienced in-house team manage the entire project from initial structural assessment to final fitting, with qualifying replacement work completed under our FENSA registration (33081) and every installation backed by a 10-year insurance-backed guarantee.
Materials
uPVC
Timber
Standard Hardware
Chrome
Satin
Gold Knob
Antique Black Knob
Standard Colours
Smooth White
Cream
Painswick Grey
Chartwell Green
Anthracite Grey
Irish Oak
Dual Colour
Paint to Order
Glass
Triple Glazed
Satin
Astragal Bars
Standard Layouts
Single
Double
Triple
Types of Double Glazed Rooflights We Install and Replace
Double Glazed Flat Glass Rooflights
Double Glazed Flat Glass Rooflights
A low-profile design and two-pane insulated glazing make double-glazed flat glass rooflights suitable for extensions, kitchens, and living areas where clear overhead daylight and thermal performance are priorities. The sealed cavity between the panes helps reduce heat transfer through the glazing whilst maintaining a clean appearance. Bowalker installs and replaces double-glazed flat glass rooflights with suitable frames, weather-resistant seals, and secure perimeter detailing specified for the roof opening.
Learn More →Double Glazed Pyramid Rooflights
Double Glazed Pyramid Rooflights
Sloping glazed faces rising towards a central apex give double-glazed pyramid rooflights their distinctive shape whilst allowing natural light to enter from several directions. Double glazing adds an insulating cavity between the panes to help limit heat transfer through the glazed structure. Our in-house double-glazed rooflight installation team installs and replaces double-glazed pyramid rooflights with suitable frames, sealed glazing units, and weather-resistant connections tailored to the roof dimensions.
Learn More →Double Glazed Roof Lanterns
Double Glazed Roof Lanterns
Raised glazed structures make double-glazed roof lanterns suitable for extensions and living spaces where homeowners want overhead daylight combined with a strong architectural feature. Their double-glazed panels help reduce heat transfer whilst the elevated design brings natural light into the room from different angles. Bowalker installs and replaces double-glazed roof lanterns with suitable framing, sealed glass units, and weather-resistant roof connections selected for the property.
Learn More →Double Glazed Barrel Vault Rooflights
Double Glazed Barrel Vault Rooflights
A continuous curved profile allows double-glazed barrel vault rooflights to bring natural daylight across long or wide roof openings whilst creating a distinctive overhead feature. Two-pane glazing with a sealed insulating cavity can support the required thermal performance across the curved structure. We install and replace double-glazed barrel vault rooflights with suitable curved glazing, structural frames, seals, and roof connections specified for the required span and dimensions.
Learn More →Double Glazed Multi-Pane Rooflights
Double Glazed Multi-Pane Rooflights
Multiple sealed glass units arranged within a supporting frame allow double-glazed multi-pane rooflights to cover larger roof areas whilst distributing natural daylight across the space below. Each double-glazed unit uses two panes separated by an insulating cavity to help reduce heat transfer. Our in-house team installs and replaces double-glazed multi-pane rooflights with suitable framing grids, weather-resistant seals, and perimeter detailing tailored to the roof layout.
Learn More →Double Glazed Aluminium Rooflights
Double Glazed Aluminium Rooflights
Slim profiles, strength, and durability make aluminium frames suitable for double-glazed rooflights where clean sightlines and generous glazed areas are required. Thermally broken aluminium systems can help limit heat transfer through the frame and complement the insulating performance of the double glazing. Bowalker installs and replaces double-glazed aluminium rooflights with suitable sealed glass units, weather-resistant seals, and framing selected for the property and roof opening.
Learn More →Double Glazed Steel Rooflights
Double Glazed Steel Rooflights
Narrow profiles and strong structural properties make steel frames suitable for double-glazed rooflights in traditional, industrial-style, and selected contemporary properties. The frame, glazing, and thermal specification can be selected together to meet the requirements of the individual roof opening. Bowalker installs and replaces double-glazed steel rooflights with compatible sealed glazing units, weather-resistant seals, and supporting components tailored to the project.
Learn More →Double Glazed Fixed Rooflights
Double Glazed Fixed Rooflights
A non-opening design makes double-glazed fixed rooflights suitable for spaces where natural daylight and thermal performance are the main requirements. With no opening mechanism, the rooflight uses a fixed glazed assembly with secure seals around the frame and glazing. Our in-house team installs and replaces fixed double-glazed rooflights with suitable frames, insulated glass units, and weather-resistant perimeter detailing specified for the roof structure.
Learn More →Double Glazed Opening Rooflights
Double Glazed Opening Rooflights
Double-glazed opening rooflights combine insulated two-pane glazing with an opening section to provide natural daylight and controllable ventilation. Depending on the selected system, the rooflight can use a compatible manual or powered mechanism whilst maintaining suitable seals when closed. Our in-house team installs and replaces double-glazed opening rooflights with suitable frames, operating components, and glazing specified around the roof opening and ventilation requirements.
Learn More →Double Glazed Sliding Rooflights
Double Glazed Sliding Rooflights
A sliding mechanism allows suitable double-glazed rooflights to create a wider opening whilst retaining the thermal benefits of insulated glazing when closed. The moving glazed section travels along a compatible track system, with the exact operation and opening area determined by the selected design. Bowalker installs and replaces double-glazed sliding rooflights with suitable frames, sealed glazing units, tracks, and weather-resistant components specified for the property.
Learn More →Not Sure Which Double Glazed Rooflight Suits Your Home? Talk to our team →
Why Homeowners Choose Bowalker for Double Glazed Rooflight Installation
10-Year Insurance-Backed Guarantee
FENSA Registered for Qualifying Replacement Rooflight Work
Hassle-Free, Full-Service Experience
In-House Installers With No Subcontractors
Fixed Pricing With No Surprises
Double Glazed Rooflight Project Gallery
What Are the Benefits of Installing Double Glazed Rooflight?
Double-glazed rooflights introduce abundant natural daylight into flat-roof extensions, kitchens, and living spaces whilst featuring dual-pane insulating technology that significantly enhances thermal performance. Their overall efficiency depends on factors such as glass specification, framing materials, spacer technology, sealing quality, and professional installation.
8 benefits of installing double-glazed rooflights include:
Reduces Heat Loss Through the Roof Glazing
The dual-pane glass configuration creates an insulated thermal barrier that traps warm air inside your property, drastically cutting down on upward heat dissipation compared to single-glazed alternatives.
Keeps Rooms Warmer and More Comfortable in Winter
By minimising cold downdraughts from overhead glazing, double-glazed rooflights help maintain an even, comfortable room temperature throughout the coldest months of the year.
Helps Reduce Internal Condensation
Advanced thermal spacer bars and dual-pane insulation minimise internal surface temperature drops, effectively lowering the risk of moisture condensation forming on the glass.
Lowers the Amount of Energy Needed for Heating
Improved thermal retention reduces the overall workload on your central heating system, helping you decrease energy consumption and lower your household utility bills.
Reduces More Outside Noise
The acoustic damping properties of two separate glass panes combined with a sealed cavity help muffle external sounds, such as heavy rain, traffic, and wind.
Supports Low-E Glass for Better Heat Retention
Double-glazed units can be enhanced with Low-E (low-emissivity) glass coatings that reflect radiant heat back into the room whilst still allowing maximum daylight to pass through.
Supports Solar-Control Glass to Reduce Summer Overheating
Tinted or specialised solar-control glass options can be integrated into the double-glazed unit to filter out excessive solar heat gain, keeping extensions cool during warm summer months.
Provides a Strong Safety Glazing Configuration
Toughened or laminated glass options can be incorporated into the inner and outer panes, offering high impact resistance and robust safety performance overall.
How to Get Started With Double Glazed Rooflight Installation at Bowalker?
Start your double-glazed rooflight installation or replacement journey with Bowalker through a simple, transparent process beginning with a free expert consultation and property survey. Our experienced in-house professionals evaluate your flat-roof dimensions, structural framing requirements, glass specifications, and thermal efficiency goals to design the ideal rooflight solution for your home. We then provide a clear, no-obligation quotation and coordinate the complete installation using our own certified in-house teams exclusively.
- Book Your Free Consultation
- Receive Your No-obligation Quote
- Proceed To Installation
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Areas we Serve
Bowalker delivers professional double glazed rooflight installation and replacement services throughout Sussex, Surrey, and surrounding regions. Our dedicated in-house team oversees every stage from initial survey and specification to expert fitting and final inspection, providing custom-tailored rooflight solutions for homeowners across all our local service areas.
What Our Happy Customers Say
We have had a front door and side panel installed,Team Tim did a great job and were very professional and knowledgeable. Wouldn’t hesitate to recommend the company and this team to any one !
Simon and Brandon fitted our three windows in our garage > studio conversion and were great through the day. Arrived when they said they would, were very polite, respectful and pleasant people. Found answers to questions we didn’t realise about the installation and though we haven’t yet finished the project the windows are a very exciting and big step forward for us. Would recommend this company and this team without hesitation. Thank you!
Had a problem with our door which was installed 3 years ago - Bowalker - Dean - came to site within 24 hours and helped resolved- thank you ! Very pleased with professional and prompt service
Excellent service from a local independent company. Highly recommend.
I had replacement windows installed. Design and advice was good and cost was competitive. Installation was started in a good time to a good standard.
Bowalker have been incredibly helpful and provided me with extremely useful information about the windows and doors at a property I moved into, previously supplied by them. Great customer service, really recommend
Bowalker replaced all of our windows and patio doors in November. They are very efficient and got the job done in the pouring rain but did it quick and professionally. We had a couple of teething issues with the doors after completion and they did not hesitate to come out and rectify the issue. Excellent customer service and a friendly team. Would highly recommend
We had a total of 6 windows fitted at end of June 2025 (2 bathroom(frosted), 1 hallway,1 dining room and two big bay windows complete with 2 window boards). Took 5 days in total as bay windows were load bearing ,the window boards were not in warehouse so took extra time to arrive and fit , the silicone/mastic finish wasn’t great and they cut one end of a window board wrong , but after a telephone call a new team of fitters came out and rectified the mistakes of original fitters that we had noticed , a window pane had got scratched in delivery so they replaced that as well. This was a big job that entailed some mistakes but over time was rectified by bowalker windows by sending out another team of fitters to fix some minor mistakes of original fitters . We went on a recommendation from a work colleague who had used Bowalker windows in the past as were very good. Maybe just improve your fitters mastic silicone skills a bit more but is is an old house of 110 years and nothing is level in this house
As a property developer operating across Brighton and Hove, I rely on trusted trades who consistently deliver — and Bowalker Windows Ltd, led by Zack Newman, is one of those partners. We specify their windows across all our developments because their products meet the high standards our clients expect, installations are completed on schedule, and site coordination with our contractors is seamless. Zack is responsive, pragmatic, and straightforward about lead times and costs, which makes planning and handovers far easier. Their workmanship is excellent, energy-performance claims are reliable, and they stand behind their warranty. Competitive pricing, professional teams, and reliable aftercare mean we’ll continue to use Bowalker Windows on future projects. Highly recommended for any developer or home owners in the Brighton & Hove area.
Meet Our Team
Bowalker provides professional double glazed rooflight installation services across Sussex, Surrey and London, delivering high-quality, premium rooflights with precision and care. Our team ensures consistent workmanship, reliable installation and continuous support for homeowners throughout these regions.
Zack Newman
Director
Anthony Bowyer
Senior Surveyor
Dean Lloyd
Operations Manager
Angela Georgant
Financial Controller
Jack Harsford
Installer
Leon Prichard
Installer
Tim Cooper
Installer
Lloyd Walker
Installer
Tim Fraser
Installer
Brandon Bowyer
Installer
Zack Newman
Director
Anthony Bowyer
Senior Surveyor
Dean Lloyd
Operations Manager
Angela Georgant
Financial Controller
Jack Harsford
Installer
Leon Prichard
Installer
Tim Cooper
Installer
Lloyd Walker
Installer
Tim Fraser
Installer
Brandon Bowyer
Installer
See Our Work In Action
- Doors
- Rooflight
- Doors
- Windows
Ready To Get Started With Bowalker Double Glazed Rooflight?
Bring more daylight into your home whilst supporting year-round thermal comfort with a double-glazed rooflight installed professionally at your property. Bowalker manages the complete process through our in-house team, selecting the glazing, frame, style, and opening configuration around your roof structure and practical requirements.
Call 01444 810 111 to arrange your free consultation and receive a no-obligation quote. From roof assessment and accurate measurements to specification, fitting, and final checks, our team manages each stage with close attention to secure fitting and weather-resistant sealing.
Bring more daylight and thermal comfort into your home with our premium double glazed rooflights, contact us today.
Frequently Asked Questions
What are Double Glazed Rooflights?
Double glazed rooflights are specialised architectural overhead glazing units built with two distinct panes of glass separated by a sealed insulating spacer bar. They are professionally installed into flat or low-pitch roofs to flood interior spaces with natural daylight whilst delivering enhanced thermal performance and weather resistance.
What Is Inside the Gap Between Double Glazed Rooflight Panes?
The gap between double-glazed rooflight panes (known as the cavity or Insulated Glass Unit) contains either dehydrated air or an inert gas (such as argon, krypton, or xenon), maintained in a hermetically sealed environment. This specialised gas fill significantly inhibits thermal transfer and improves the overall energy efficiency of the rooflight.
What Does Low-E Glass Do in a Double Glazed Rooflight?
Low-E (low-emissivity) glass reduces radiant heat transfer through the glazing in a double-glazed rooflight. Its thin low-emissivity coating helps retain heat inside the property whilst still allowing natural daylight to pass through the rooflight.
Do Double Glazed Rooflights Help Reduce Condensation?
Yes, double-glazed rooflights can help reduce condensation by keeping the internal glass surface warmer than less insulated glazing under comparable conditions. Condensation can still occur when indoor humidity is high, or ventilation is insufficient, so glazing performance is only one factor in controlling moisture.
Can Double Glazed Rooflights Reduce Outside Noise?
Yes, double-glazed rooflights help reduce outside noise by using two independent glass barriers and an insulating air or gas gap that dampens sound wave transmission. This acoustic insulation creates a noticeably quieter indoor environment by muting external disturbances like traffic and heavy rain.
Should the Inner Pane of a Double Glazed Rooflight Be Laminated?
Yes, the inner pane of a double-glazed rooflight can be laminated where the rooflight design, safety requirements, and glazing specification call for it. Laminated glass contains an interlayer that helps hold broken glass together, reducing the risk of loose fragments falling into the room below.
How Can You Tell if a Double Glazed Rooflight Seal Has Failed?
You can tell if a double-glazed rooflight seal has failed by noticing persistent misting, condensation, or water staining trapped directly between the two glass panes. Once the hermetic seal breaks down, ambient moisture enters the cavity and cannot escape, requiring professional unit replacement.
Why Does a Double Glazed Rooflight Mist Up Between the Panes?
Double-glazed rooflight mist up between the panes because the perimeter hermetic seal has degraded, allowing moisture-laden air to penetrate the insulating cavity. Temperature fluctuations then cause this trapped moisture to condense on the internal glass surfaces, obscuring the view and reducing thermal efficiency.
Is Double or Triple Glazing Better for a Rooflight?
Double glazing is better for a rooflight if the selected system already provides suitable thermal performance whilst meeting the project’s weight, cost, and structural requirements, whereas triple glazing is better if a higher level of insulation is required and the rooflight system can accommodate it. The right option depends on the property, roof structure, glass specification, rooflight size, and required thermal performance.
Are Double Glazed Rooflights Suitable for Kitchens and High-Humidity Rooms?
Yes, double-glazed rooflights are suitable for kitchens and high-humidity rooms because their thermally efficient construction minimises internal surface condensation risks. When paired with an opening mechanism, they also provide effective ventilation to quickly clear out cooking steam and moisture.
Do Double Glazed Rooflights Need Planning Permission?
No, double-glazed rooflights do not need planning permission as long as they comply with standard Permitted Development limits, such as projecting no more than 150 millimetres beyond the existing roof plane. However, properties in conservation areas or listed buildings may require formal local authority consent.
Do Double Glazed Rooflights Need to Meet Building Regulations for Thermal Performance?
Yes, double-glazed rooflights must meet UK Building Regulations for thermal performance, complying with strict maximum U-value standards to ensure energy conservation. Professional installations managed by accredited specialists like Bowalker guarantee full regulatory compliance and proper documentation.
Can a Replacement Double Glazed Rooflight Be FENSA Certified?
Yes, a replacement double-glazed rooflight or roof window can be FENSA certified if it is installed by a registered contractor like Bowalker under our FENSA certification (Reg: 33081). This official status streamlines the compliance process without requiring separate local council building control inspections.
Where Are Double Glazed Rooflights Most Suitable?
Double glazed rooflights are most suitable for flat-roof extensions, modern kitchen diners, loft conversions, and home offices where vertical windows cannot reach. They provide a reliable source of overhead natural illumination across architectural living spaces.
What Should Be Considered Before Installing a Double Glazed Rooflight?
Before installing a double-glazed rooflight, you must consider structural roof weight capacities, directional orientation for solar heat gain, and the pitch requirements for proper drainage. Professional site surveys help determine the ideal size, frame material, and glazing specifications for your specific layout.
How to Maintain a Double Glazed Rooflight?
To maintain a double-glazed rooflight, you should periodically clean the exterior glass surface with non-abrasive solutions and clear away leaves or debris to ensure proper water runoff. Regular inspections of the perimeter seals and flashing will also help preserve weather-tight integrity for years to come.