Flat Roof Glass Rooflight (Up to 1.5m x 3.5m) – Made to Measure Skylight with Optional Welded Cills & Guttering
- Brand: Master Plastics
- Product Code: SKY1.5X3.5
- Availability: In Stock
1.5m x 3.5m Made to Measure Flat Roof Glass Rooflight
Bring exceptional levels of natural daylight into a large extension, open-plan living space or commercial project with our 1.5m x 3.5m Made to Measure Flat Roof Glass Rooflight.
Available in custom sizes up to approximately 1500mm x 3500mm internal frame size, this substantial rooflight provides up to approximately 5.25m² of internal rooflight area, making it ideal for large kitchens, dining areas, garden rooms, extensions and other flat roof projects.
Manufactured to order in Bristol, each rooflight can be configured with a choice of glazing, frame finishes and optional extras including welded cills, guttering, self-cleaning glass, blue tint glass, cresting and finials.
Large 1.5m x 3.5m Made-to-Measure Glass Rooflight
Every rooflight is made to measure, allowing you to specify the dimensions required for your individual project rather than being restricted to standard sizes.
- Maximum Internal Frame Size: Approximately 1500mm x 3500mm
- Maximum Internal Area: Approximately 5.25m²
- Application: Flat Roofs
- Standard Glass: Low-E Toughened Argon-Filled Glass
- Double or Triple Glazing: Available
- Self-Cleaning Glass: Optional
- Blue Tint Glass: Optional
- Welded Cills: Optional
- Guttering: Optional
- Manufactured: Bristol
Large Glass Rooflight for Extensions
With maximum internal dimensions of 1.5m x 3.5m, this rooflight is designed for larger spaces where a substantial area of overhead glazing is required.
The long glazed design works particularly well in contemporary rear extensions and open-plan rooms, helping daylight reach areas positioned further away from conventional windows and doors.
Typical applications include:
- Large kitchen extensions
- Open-plan kitchens
- Kitchen-diners
- Dining areas
- Garden rooms
- Contemporary extensions
- New-build properties
- Commercial buildings
- Offices and workspaces
Glass Rooflight for Large Open-Plan Kitchens
A large glass rooflight can become a major architectural feature within an open-plan kitchen or living space.
The 3.5 metre maximum length makes this size particularly suitable for positioning above a long kitchen island, dining area or central section of an extension, introducing natural daylight directly into the heart of the room.
Important Rooflight Measuring Information
Dimensions entered when ordering are the internal frame measurements.
The surrounding profiles are approximately 70mm wide, so approximately 70mm should be added to each side when calculating the external frame size.
1500mm x 3500mm Rooflight Size Example
- Internal Frame: 1500mm x 3500mm
- Approx. External Frame: 1640mm x 3640mm
Optional Welded Cill Dimensions
Where welded cills are selected, additional allowance must be made for the overall dimensions.
Where the cill extends approximately 160mm from each side of the internal frame measurement, the approximate maximum overall dimensions would be:
- Internal Frame: 1500mm x 3500mm
- Approx. Overall Cill: 1820mm x 3820mm
Please check all dimensions carefully before constructing the roof opening, kerb or supporting structure.
Low-E Toughened Glass
The standard rooflight is supplied with Low-E toughened, argon-filled glass, providing natural daylight together with good thermal performance and safety.
Double and triple-glazed configurations are available, allowing the glazing specification to be selected to suit the requirements of your project.
Glass Options
- Low-E Toughened Glass
- Argon-Filled Sealed Units
- Double Glazing
- Triple Glazing
- Self-Cleaning Glass
- Blue Tint Glass
Self-Cleaning Glass Option
For a rooflight of this size, self-cleaning glass can be particularly useful because access to the external surface may be difficult after installation.
Select the self-cleaning glass upgrade when configuring your rooflight if required.
Rooflight Frame Colour Options
- White
- Rosewood
- Mahogany
- Light Oak
Aluminium roof bars are also available in selected Light Oak, Mahogany and Rosewood finishes.
Optional Hunter Regency Guttering
An optional Hunter Regency guttering system can be supplied where rainwater collection is required around the rooflight.
The package can include the appropriate guttering, downpipes, brackets, spigots and connecting components for the selected configuration.
Optional Cresting and Finials
Decorative cresting and finials can be added for a more traditional appearance, or omitted where a cleaner contemporary rooflight design is preferred.
Flat-Packed or Part-Assembled
- Flat-Packed: Supplied ready for assembly on site.
- Pre-Assembled to Glazing Stage: Main rooflight structure assembled before delivery, with glazing and finishing trims installed on site.
Suitable assistance will be required for unloading larger or pre-assembled rooflights. Please consider delivery access and safe handling before ordering.
Residential and Commercial Glass Rooflights
The larger dimensions also make this rooflight suitable for selected commercial flat roof applications, including offices, workspaces and other buildings where a substantial area of natural overhead daylight is required.
Made-to-measure manufacture allows the rooflight dimensions to be coordinated with the building design and supporting roof structure.
Made-to-Measure Glass Rooflights Bristol
We manufacture made-to-measure glass rooflights in Bristol for homeowners, builders, developers and trade customers.
Rooflights can be manufactured to suit individual projects throughout Bristol and the surrounding area, with delivery also available to customers elsewhere in the UK.
1.5m x 3.5m Glass Rooflight Specification
- Product: Made to Measure Flat Roof Glass Rooflight
- Maximum Internal Size: Approximately 1500mm x 3500mm
- Maximum Internal Area: Approximately 5.25m²
- Approx. Maximum External Frame: 1640mm x 3640mm
- Approx. Overall Cill: 1820mm x 3820mm when applicable
- Standard Glass: Low-E Toughened Argon-Filled
- Glazing: Double or Triple Glazing Options
- Glass Upgrades: Self-Cleaning or Blue Tint
- Frame Colours: White, Rosewood, Mahogany or Light Oak
- Welded Cills: Optional
- Guttering: Optional Hunter Regency System
- Cresting & Finials: Optional
- Assembly: Flat-Packed or Pre-Assembled to Glazing Stage
- Manufacture: Made to Measure in Bristol
Ordering Your Glass Rooflight
Enter the required internal frame dimensions and select the glazing, colour and optional extras required for your project.
Because every rooflight is manufactured specifically for your order, please carefully check all dimensions before ordering and before constructing the supporting roof opening or kerb.
Installation and Weatherproofing
Roof felt, flashing and surrounding weatherproofing should be correctly completed as part of the installation. The rooflight must be properly integrated with the supporting structure and surrounding flat roof system to provide a secure and weather-resistant installation.




