State of the art design
Discover award-winning solutions that bring together clean lines and refined detailing in a modern architectural expression.
New addition to the flat roof window portfolio from September 2026
New Standard glass rooflight with a modern design with attention to detail, compatible with the base units of the existing CVP/CFP flat roof window generation.
The new flat roof window with a glass top cover offers a cost-efficient solution for spaces with moderate insulation requirements, where daylight, ventilation, and comfort are the main priorities. With its clear, contemporary design, proven quality, and easy installation, it represents a compelling alternative between classic flat roof domes and flat roof windows with curved or flat glass covers - ideal for projects that combine functionality, design, and cost efficiency.
Automated control
Leverage integrated technology for automated rain, heat, light and indoor climate control.
Built for performance
Ensure efficient energy use, comfort and durability that supports your long-term building performance.
Install with ease
Rely on the best-in-class, secure and extensively tested product construction and installation system.
Solutions for every project
A complete range of flat roof window solutions designed to meet a wide range of project needs. Choose from various types, sizes, and features to match your requirements - delivering high-quality aesthetics, indoor comfort, performance, and easier project execution.
Standard glass rooflight
CVP/CFP with ISG 2093
- Fixed or electrically driven vented variants
- Double glazed, laminated pane in base unit
- Compatible with integrated high performance shading solutions
- Sizes up to 120cm x 120cm
- Available from September 2026
Curved glass rooflight
CVU/CFU with ISU 1093
- Fixed, solar or electrically driven vented variants
- Double or triple glazed pane in base unit
- Compatible with integrated high performance shading solutions
- Sizes up to 200cm x 100cm
Flat glass rooflight
CVU/CFU with ISU 2093
- Fixed, solar or electrically driven vented variants
- Double or triple glazed pane in base unit
- Compatible with integrated high performance shading solutions
- Sizes up to 200cm x 100cm
Glass rooflight electric roof exit
CXU with ISU 1093/2093
- Electrically driven, double or triple glazed base unit
- Curved or flat glass top units
- Compatible with integrated high performance shading solutions
- Access via indoor switch and key. Compatible with VELUX Control unit KES 305 (not included)
Dome with glazing
CVP/CFP with ISD
- Fixed, manual or electrically driven vented variants
- Double glazed, laminated pane in base unit
- Opaque or clear, polycarbonate or acrylic dome top unit
- Compatible with integrated high performance shading solutions
Dome with glazing smoke ventilation
CSP with ISD
- Electrically driven
- Automatically opens in case of fire
- Double glazed, laminated pane in base unit
- Opaque or clear, polycarbonate dome top unit
Dome with glazing roof exit
CXP with ISD
- Manually operated
- Opaque or clear polycarbonate or acrylic dome top unit
- Double glazed
- Opens up to 60° for unimpeded access
Dome for uninhabited rooms
CVJ/CFJ/CSJ with ISJ/ZCJ
- Fixed, manual or electrically driven vented variants
- Opaque 2- or 3-layer, polycarbonate or acrylic dome top unit
- Base units in three heights
- Smoke exhaust and roof exit variants available
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.
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.
For more detailed technical documentation, explore our comprehensive library of specifications, guides and supporting resources.
General overview
General overview
Operation types: fixed, vented
Special functions: cold rooms, exits, smoke exhaust, smoke ventilation, burglary resistant
Control: manual, solar and electric variants. VELUX Active sensor control
Size range: 600-1500 mm x 600-2000 mm (Standard sizes)
Roof pitch: 10˚-20˚
Glazing: double glazed, triple glazed, curve tech
Shading: anti-heat blind, blackout blind, blackout energy pleated blind, insect screens
Electrical installation
Electrical installation
Supply voltage: 230V
Energy efficiency and acoustics
Energy efficiency and acoustics
Soundproofing: 31-42 dB
Thermal transmittance (Uw-value): 0.77 - 1.4 W/m²K
Solar heat gain coefficient (g-value): 0.27 - 0.60
Certificates
Certificates
Available in technical library.
3D and 2D models
3D and 2D models
Available in technical library.
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Daylight design guide - flat roofs
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Build a solid understanding of the VELUX product range and learn how to specify the right roof window solution for each project.
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