3250mm x 3250mm Made to Measure Glass Flat Roof Window Lantern

Our 3250mm x 3250mm Square Gazebo Style Roof Lantern is a large made-to-measure flat roof window lantern designed with four equal-sized sides to create an impressive and symmetrical gazebo-style roof. At 3.25 metres square internally, it provides a substantial overhead feature while bringing natural daylight into the room below.

Ideal for large extensions, kitchens, kitchen-diners, open-plan living areas, conservatories and garden rooms, the lantern is supplied as a complete roof system with the uPVC window frames, roof structure, guttering, your selected glass or polycarbonate roofing and a decorative finial.

3250mm x 3250mm Square Roof Lantern

The stated 3250mm x 3250mm measurement is the internal frame size. The four equal sides create the balanced square shape associated with a traditional gazebo-style roof lantern.

With an internal area measuring 3.25m x 3.25m, this is one of the larger square lantern sizes and can create a prominent architectural feature within a large flat roof.

Complete Made-to-Measure Roof Lantern

The 3250mm square gazebo roof lantern is supplied as a complete system with the main components required to create the finished structure.

• Internal frame size: 3250mm x 3250mm
• Design: Square gazebo style with four equal sides
• Manufacture: Made to measure
• uPVC window frames: Included
• Lantern roof structure: Included
• Roof guttering: Included
• Roof: Choice of glass or polycarbonate
• Decorative finial: Included

3250mm x 3250mm Internal Frame Size

Important: The stated 3250mm x 3250mm size is the internal frame measurement. It is not the overall external dimension of the complete roof lantern.

The uPVC window profiles are approximately 70mm wide. Allowing approximately 70mm on each side adds 140mm to the overall width and length.

The approximate external frame size is therefore 3390mm x 3390mm.

The cill extends approximately 160mm on each side, adding approximately 320mm to the stated internal width and length.

The approximate overall external cill size is therefore 3570mm x 3570mm.

3250mm x 3250mm Roof Lantern Dimensions

• Internal frame size: 3250mm x 3250mm
• Approx. external frame size: 3390mm x 3390mm
• Approx. external cill size: 3570mm x 3570mm

Please check all dimensions carefully before constructing the roof opening, kerb or supporting upstand.

Large Square Gazebo Style Roof Lantern

The four equal-sized sides create the distinctive square gazebo-style roof lantern. The combination of vertical uPVC window frames and the raised roof above provides additional height and creates a striking focal point within the room.

At 3250mm x 3250mm internally, the lantern provides a substantial overhead area and is particularly suited to large extensions and open-plan living spaces.

Natural Light for Large Rooms

A large 3.25m square roof lantern can help introduce daylight towards the centre of a deep extension, where natural light from conventional windows and doors may be more limited.

The raised roof also creates a greater feeling of height, making it particularly attractive for large kitchens, dining areas and open-plan family spaces.

Important Information About the Roof Design

Please note: Product photographs may show the smaller 1000mm x 1000mm gazebo roof lantern.

Larger gazebo lanterns require different roof configurations to provide the necessary strength and structural support. The exact roof configuration of this 3250mm x 3250mm lantern may therefore differ from the smaller roof lantern shown in the photographs.

The roof will be configured appropriately for the larger dimensions while retaining the overall square gazebo-style appearance.

Glass Roof Lantern Option

Choose glass roof glazing for the clean appearance associated with a traditional glazed roof lantern. The large glazed roof area allows natural daylight to enter from above while creating an impressive feature within the room.

Polycarbonate Roof Lantern Option

A polycarbonate roof is also available as an alternative to glass. Polycarbonate provides a lightweight and practical roofing option while retaining the distinctive raised gazebo-style roof design.

Ideal for Large Flat Roof Extensions

A 3250mm x 3250mm flat roof lantern is particularly suited to larger properties and projects where a substantial overhead rooflight is required.

Typical applications include:

• Large kitchen extensions
• Kitchen-diners
• Open-plan living areas
• Dining rooms
• Family rooms
• Garden rooms
• Conservatories
• Orangeries
• Large flat roof extensions
• Suitable commercial and hospitality spaces

Product Specification

• Product: Made-to-measure flat roof window lantern
• Style: Square gazebo roof lantern
• Internal frame size: 3250mm x 3250mm
• Approx. external frame size: 3390mm x 3390mm
• Approx. external cill size: 3570mm x 3570mm
• Shape: Square
• Frame material: uPVC
• Window profile width: Approximately 70mm
• Cill: Approximately 160mm each side
• Roof options: Glass or polycarbonate
• Roof guttering: Included
• Decorative finial: Included
• Manufacture: Made to measure

Made-to-Measure Glass Flat Roof Window Light

Our 3250mm x 3250mm square gazebo roof lantern combines traditional roof lantern styling with the convenience of a complete made-to-measure system.

The uPVC window frames, roof structure, guttering, selected glass or polycarbonate roofing and decorative finial are supplied together to create the finished lantern.

Check Your Roof Lantern Measurements

Because the ordering dimensions refer to the internal frame size, additional space must be allowed for the uPVC window profiles and cill when preparing the supporting structure.

• Internal frame: 3250mm x 3250mm
• Approx. external frame: 3390mm x 3390mm
• Approx. external cill: 3570mm x 3570mm

Always confirm the required dimensions before constructing the roof opening, kerb or supporting upstand.

Frequently Asked Questions

Is 3250mm x 3250mm the overall lantern size?

No. 3250mm x 3250mm is the internal frame size. The overall external frame and cill dimensions are larger.

What is the approximate external frame size?

The approximate external frame size is 3390mm x 3390mm.

What is the approximate external cill size?

The approximate external cill size is 3570mm x 3570mm.

Can the lantern have a glass roof?

Yes. You can choose between glass and polycarbonate roof glazing.

Are the window frames and guttering included?

Yes. The complete system includes the uPVC window frames, roof structure and guttering.

Is the decorative finial included?

Yes. A decorative finial is included to complete the traditional gazebo-style appearance.

Will the 3250mm lantern look exactly like the smaller lantern in the photographs?

Not necessarily. Larger lanterns require different roof configurations to provide the necessary structural support, so the 3250mm x 3250mm roof design may differ from the smaller example shown.

Where can a 3250mm square roof lantern be used?

It is suitable for appropriate large extensions, kitchens, kitchen-diners, open-plan living spaces, garden rooms, conservatories and other large flat roof projects.