Interior designers, architects, facility managers, developers and consumers all play a crucial role by making the choices that define sustainable living for the users. How do you make the right choices when designing, sourcing and developing an interior? To help with the vast number of possibilities the Dutch Green Building Council (DGBC), NIBE and Ex Interiors have developed INSIDE/INSIDE; an impartial sustainability-comparison tool for interior design.


INSIDE/INSIDE is an online platform where information can be easily viewed and compared to assess the sustainability and health of an interior and how it fits into a circular economy. Interior designers, facility managers, housing developers or consumers select products and materials from the database to access reliable data concerning their environmental and health impacts. A mood board can be created as well displaying more detailed information on the products. Select the products required for the interior design, or calculate the materials needed by surface area and add the products to a virtual shopping basket. INSIDE/INSIDE then calculates how the user’s choice will impact the environment. The total impact can be viewed in one easy glance or broken down by item to see where gains can be made. Users save time and money otherwise spent gathering hard-to-find information. INSIDE/INSIDE offers reliable information that has been independently tested. The website can be used for budgeting and certification purposes.

How does INSIDE/INSIDE work?

As supplier or producer, you get your products or materials certified through a life-cycle assessment. The results are placed in the database to allow for an objective comparison between all materials and products. The system allows for an impartial assessment of products and materials. Better-researched choices based on independently- tested sustainability factors. A way to factually compare tenders based on sustainability that is in line with European law developments.

There are multiple product categories available:

  • Floors
  • Walls
  • Ceilings
  • Materials
  • Furniture
  • Coating
  • Textile
  • Various interior elements

By combining the life-cycle assessment and material circularity indicators of paints and varnish, furniture and other aspects of an interior design a full calculation can be made of an interior space. The environmental footprint is calculated in Euros by factoring in the size in square meters of the whole project. This indicator, also called the shadow cost, gives the amount that is necessary to counteract its negative environmental impact. In other words a product with a lower shadow cost is better than a product with higher shadow costs.

The materials circularity indicator based on the theory of Ellen Mac Arthur provides insight in the circularity of the product expressed in a percentage. INSIDE/INSIDE allows products to be compared allowing for clear and fair sustainable choices.

For more information please read our Brochure,

We are currently developing an English website, for more information please contact us.

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