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VELUX roof window solutionsExperience unparalleled flexibility

Product highlights

Diagram of multiple VELUX roof window flashing types with codes 01–07 and spacing labels a and b.

Modular flexibility

Find the ideal solution for your project by combining products from our versatile product system.
Three VELUX roof window frame finishes: natural wood, white painted wood and white polyurethane.

Customisable specs

Select options that guarantee the right fit for your project, from materials and finishes, operation, and integrated shading.

Hand using a smart control panel in a cozy indoor setting.

Automated control

Choose between electric and solar powered solutions to unlock automation for rain, heat, light and indoor climate control. 
VELUX roof window with open shade, sunlight streaming through.

Built for efficiency

Support building performance with durable solutions designed to optimise energy use and indoor comfort.
Person installing VELUX roof window on a black tiled roof.

Install with ease

Rely on an installation system that is best-in-class, secure and thoroughly tested.

Solutions for every project

A complete range of roof window solutions designed to work together. Stack, connect, and combine windows to create the ideal configuration, and choose features that match your project requirements. Built as a unified system, delivering flexibility, performance, and a smoother installation process.
Partly opened VELUX roof window with slim dark frame on neutral background.

Centre-pivot roof window

GGL/GGU
  • Manual, solar and electrically operated variants
  • Burglary resistant variant
  • Double or triple glazing
  • Compatible with interior and exterior shading solutions
Open VELUX roof window frame shown in profile on a light background.

Top-hung roof window

GPL/GPU
  • Manual, solar and electrically operated variants
  • Double or triple glazing
  • White painted or white maintenance-free
  • Compatible with interior and exterior shading solutions
Three white VELUX roof windows in a row, all open in a sloping roof configuration.

Triplette

3 x GGU/GGL/GPU/GPL
  • Connects your preferred window types using combination flashing system
  • Manual, solar and electrically operated variants
  • Double or triple glazing
  • Compatible with interior and exterior shading solutions
Four partially open VELUX roof windows grouped together on a pitched roof.

Quattro

4 x GGU/GGL/GPU/GPL
  • Connects your preferred window types using combination flashing system
  • Flashing variants for different roofing materials
  • Compatible with interior and exterior shading solutions
Two side by side VELUX roof windows fully opening outward in a sloping roof setup.

3in1 roof window

GGLS/GPLS
  • Manually operated
  • Double or triple glazing
  • Compatible with interior and exterior shading solutions
Two stacked VELUX roof windows partly open in a slim white frame system.

Vertical duo

2 x GGU/GGL/GPU/GPL
  • Connects your preferred window types using combination flashing system
  • Flashing variants for different roofing materials
  • Compatible with interior and exterior shading solutions
Slim vertical VELUX roof window combination with two tall panes in a dark frame.

Sloping and fixed

GIL/GIU
  • Connects below your preferred roof window using combination flashing system
  • Compatible with GGU/GGL/GPU/GPL
  • Double or triple glazing
  • Compatible with interior shading solutions
VELUX roof window with extra lower element, upper sash closed and lower part partly open.

Sloping and vertical

VFE/VIU
  • Connects below your preferred roof window using combination flashing system
  • Compatible with GGU/GGL/GPU/GPL
  • Double or triple glazing
  • Compatible with interior shading solutions
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A strong sustainability choice for your business

Across the VELUX product range, sustainability is integrated in every stage - from material selection and packaging to documentation, certifications, and performance. We focus on transparency, recyclability, and long-term performance, helping professionals make informed and responsible design and specification decisions.

Globally recognised sustainability standards

Choosing VELUX means working with a supplier recognised at the highest level for responsible business practices. As the first and only roof window company rated EcoVadis Platinum, VELUX ranks among the top 1% of assessed companies.

Environmental data you can rely on

96% of the VELUX product portfolio is covered by Environmental Product Declarations (EPDs)*, providing transparent and third‑party verified data to support documentation, compliance and informed product specification.

*Roof windows, flashings and installation products, excluding copper and zinc variants.

Actively reducing packaging waste

As of 2024, 97% of our primary packaging in Europe was paper-based and recyclable. Globally, we continue to eliminate plastic packaging from our products, making it easier for you to recycle, and minimizing the impact on the planet.

*In 2024, 97% of Residential primary packaging in Europe was paper-based.

We use 100% certified wood

All the wood used in our production is certified by the Forest Stewardship Council® or the Program for the Endorsement of Forest Certification, ensuring the products you work with meet high environmental standards.

License numbers: FSC-C108944, PEFC/09-31-020

Technical specifications

All the information you need to specify with confidence - including dimensions, energy performance, certifications and installation requirements.

For a quick overview of available sizes, see the full size chart to identify the most suitable solution for your project.

View product size chart

For more detailed technical documentation, explore our comprehensive library of specifications, guides and supporting resources.

Go to technical library

General overview

Operation types: top-hung, centre pivot, balcony, terrace, and more.

Special functions: cold rooms, exits, conservation, smoke ventilation.

Control: manual, solar and electric variants. VELUX Active sensor control.

Size range: 550-1340 mm x 550-1800 mm (Standard sizes)

Roof pitch: 15˚-90˚

Combinations: side-by-side, triplette, vertical duo, sloping and fixed, sloping and vertical, quattro, dormer.

Internal finish: white (maintenance-free), white painted wood, clear-lacquered wood.

Glazing: double glazed, triple glazed, heat protection, noise reduction, security.

Shading: exterior black out shutter, exterior anti-heat blind, interior blackout/translucent roller blind, interior blackout/translucent pleated blind, Venetian blind, insect screens.

Electrical installation

Supply voltage: 230V

Energy efficiency and acoustics

Soundproofing: 31-42 dB

Ventilation capacity (airflows range, qv): 1,6 - 23,5 l/s (through ventilation flap) ranging from 1 - 20 Pa pressure difference.

Thermal transmittance (Uw-value): 0.77 - 1.4 W/m²K

Solar heat gain coefficient (g-value): 0.27 - 0.60

Certificates

Available in technical library.

3D and 2D models

Available in technical library.

Get inspired, work smarter, stay informed
Discover products used in real projects
Daylight design guide - sloped roofs
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Experience the real thing

Build a solid understanding of the VELUX product range and learn how to specify the right roof window solution for each project.
RIBA‑approved CPDs
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