Viddø
Window Elements
- EPD Certified
- Made in Denmark
Viddø is a facade window system made from insulated glass units discarded due to minor visual variations, without affecting thermal or structural performance. The system delivers documented thermal performance and daylight quality while giving the facade a distinct expression. Viddø is a professional alternative to conventional window systems for projects seeking architectural character with reduced documented environmental impact.
Viddø
Window Elements
- EPD Certified
- Made in Denmark
Viddø is a facade window system made from insulated glass units discarded due to minor visual variations, without affecting thermal or structural performance. The system delivers documented thermal performance and daylight quality while giving the facade a distinct expression. Viddø is a professional alternative to conventional window systems for projects seeking architectural character with reduced documented environmental impact.
Viddø is in collaboration with:
Viddø is made from discarded glass IGU’s
44%
Reduction in CO₂e compared to similar products
21.08 kg
Waste saved per m²
52.49 kg
CO₂e per m²
*CO₂e footprint and comparison is based on an avoided emission study including phases A1–A3 and C1–C4. Phase B and D excluded. Comparison is based on a triple glazed wooden-aluminium frame; with either: a) virgin IGU or b) 30% virgin IGU and 70% discarded IGU. For more info, confer ‘Explainer_Viddø_Comparison’ in our download centre.
Why Choose Viddø
Why professionals choose Viddø for their projects
Viddø combines circular sourcing with established facade expertise. Developed and manufactured in collaboration with Krone Vinduer, the system is delivered with the same structural integrity, warranty framework, and installation principles as conventional facade window systems. Projects can specify Viddø with full product responsibility, predictable delivery, and documented performance - reducing uncertainty while maintaining architectural ambition.
Full Product Guarantee
Full Product Guarantee
With Viddø you get the same guarantees and responsibilities as for conventional facade window systems. a:gain delivers with full product responsibility, so you can specify circular building products with the same security as virgin.
EPD Certified
EPD Certified
Viddø is delivered with an Environmental Product Declaration (EPD), so you can document climate impact and meet requirements for CO₂e calculations and DGNB. The product is also compliant with EU Taxonomy M5.1.
Easy to Install & Maintain
Easy to Install & Maintain
Viddø is delivered, installed and maintained as any other standard window solutions.
Window elements from discarded glass units
Application
Facade windows or window facades
Glass
60% - 100% discarded glass units
Frame
Wood & wood
Wood & aluminium
Wood Finish
Lacquered, oiled or painted
Aluminium Finish
Anodised
Installation
As any virgin window
Energy Performance
Ug (Thermal Transmittance): avg. 0,58 W/(m2K)
Gg (Visible Light Transmittance): avg. 45 %
LTg (Total Solar Transmittance): avg. 64 %
Funded by the EU
Viddø is funded by the EU. Read more
In Collaboration With
Made In
Denmark
Appearances
See Viddø's window arrangement layouts
Explore our different layout options for Viddø - from structured grids to more dynamic compositions. These arrangements illustrate possible expressions, while each system is fully customised in window dimensions to match your project's specific requirements and the available glass units.
Frame material & finish options
Frame material & finish options
The frame system is developed in collaboration with Krone Vinduer and follows standard façade construction principles.
Available options include:
Wood
Oak, ebony, douglas, mahogany, LVL, pine.
Wood & Aluminium
A combination of wood on the inside and aluminum outside for enhanced exterior durability.
Wood Finish
The wood can be oiled, lacquered or painted to your specified RAL- color.
CO2e Footprint Calculator
Calculate the real impact of your next project
Use the CO₂e Footprint Calculator to estimate how much discarded material you prevent, and how much CO₂e you save, when choosing Viddø window elements instead of conventional façade glazing systems. This helps you document sustainability benefits in tenders, DGNB submissions, and client presentations.
Viddø is developed around a simple principle: high-performance materials should not become waste due to minor visual deviations.
The insulated glass units used in Viddø retain full thermal and structural performance but would normally be discarded because they do not meet strict aesthetic standards. By integrating these units into a documented façade window system, Viddø reduces material waste and lowers the project’s total CO₂e footprint - without compromising performance, compliance, or warranty structure.
The system is supported by verified environmental documentation, including an EPD and EU Taxonomy compliance, enabling projects to document climate impact in LCA calculations and certification schemes such as DGNB.
Viddø Production Process
1. Collection of discarded glass
High-performing insulated glass units (IGUs) that would otherwise be discarded due to minor imperfections are collected for reuse.
2. Sorting & ID tagging
The collected glass units are carefully sorted and digitally tagged to ensure full tracking and traceability throughout their lifecycle.
3. Digital arrangement
With the help of digital tools, the glass panels are arranged like a puzzle, ensuring every piece finds its best use - delivering unique aesthetics while making full use of existing materials.
4. Production
Our partner Krone Vinduer assembles the glass into window elements, tailored to the chosen material and finish.
5. Installation
Viddø is delivered on-site and installed just like any other standard window element, making it simple and familiar for contractors to work with.
6. Demounting
When a building is renovated or demolished, Viddø is designed for easy disassembly and can seamlessly re-enter our take-back system for reuse.
Downloads
Access all Viddø specifications, certificates, resources and images
Product Booklets
An overview of Viddø's product details.
Price List
Viddø pricing and quotations are always project-specific. Please contact our sales team for details.
Project Reference Booklet
A collection of completed reference projects.
Installation & Maintenance
User guide for Krone windows covering installation, use, and maintenance.
Technical Data
Viddø's performance overview, classification, installation requirements, and compliance standards.
Environmental Documentation
A verified EPD for Viddø and a short explainer of its CO₂e results.
Tender Descriptions
Tender descriptions detailing technical, sustainability, and procurement criteria.
Declaration confirming Viddø's compliance with EU Taxonomy Appendix C.
Close-up visuals highlighting material textures and detailing of Viddø.
Large-scale visuals showing Viddø in full architectural context.
Product Booklets
Product Booklets
Price List
Price List
Viddø pricing and quotations are always project-specific. Please contact our sales team for details.
Project Reference Booklets
Project Reference Booklets
Installation & Maintenance
Installation & Maintenance
User guide for Krone windows covering installation, use, and maintenance.
Technical Data
Technical Data
Environmental Documentation
Environmental Documentation
Tender Descriptions
Tender Descriptions
EU Tax. M5.1 Compliance
EU Tax. M5.1 Compliance
Declaration confirming Viddø's compliance with EU Taxonomy Appendix C.
Close-up Product Images
Close-up Product Images
FAQS
Frequently Asked Questions
General
Covers available window sizes, structural limitations, expected variations in reused units, pricing parameters, design validation before order, and the typical share of reused IGUs in a project.
What sizes of windows can you deliver? What’s the optimal window size?
What sizes of windows can you deliver? What’s the optimal window size?
We can deliver windows in all sizes. The optimal window size is roughly 2.7×4.2 m.
Is the wall a supporting construction element, i.e. can it hold weight?
Is the wall a supporting construction element, i.e. can it hold weight?
No, the modules are not intended to bear weight. They are mounted after the supporting elements are in place.
What kind of defects can appear on the windows?
What kind of defects can appear on the windows?
The window size and depth, the profile type, the finish, the amount of doors and openable windows, and other customer-specific needs affect the price.
What parameters influence the price?
What parameters influence the price?
The price is influenced by the window's size and depth, the profile type, the surface treatment, the number of doors and operable windows, as well as other customer-specific needs.
Will I see the design before I make up my mind?
Will I see the design before I make up my mind?
Yes, we will always provide you with 2-5 different layout options and verify the design with you before placing an order.
How many of the glass units are discarded? Will I see the difference between the virgin and discarded IGUs?
How many of the glass units are discarded? Will I see the difference between the virgin and discarded IGUs?
The amount of reused windows will depend on hole and available glass. Around 70% is to be expected. This will also be communicated when reviewing different layout options. For a higher percentage of reused windows – please reach out early in the project and leave some room for flexible sizing. If we can define the hole in the projects facade from the available windows, rather than the other way around, very high percentages are possible. The reused windows can be identified on their original small branding and marking. Visibly from afar, the most prominent quality is that the windows can have different colour finishes, resulting in a facade that from some angles display a play of different tints in the windows. This is noticeable in specific light reflections.
Customisation
Explains layout flexibility based on available stock and how we develop 2–5 design proposals together before finalising the facade composition.
Can I design my own layout?
Can I design my own layout?
No, you cannot design your own layout as the windows we have in stock vary over time. However, we’ll always include you in the design process and make sure we find a solution that you’re happy with. Typically, we’ll provide 2-5 different layout options that you can choose between.
