9. September 2025

Press Release: Launch of LIFE Renew it

LIFE Renew it has officially launched. Over the next 36 months, the project will pilot collective self-retrofit models in neighbourhoods across several EU countries, including France (Besançon), Spain (Centelles and Getafe) and Germany (Berlin), actively involving residents in renovating their homes to make deep renovation more affordable, inclusive and socially embedded. Across Europe, 34 million people face high energy bills and poor housing conditions, while municipalities and housing...

The Netherlands, Utrecht - Overvecht Net Zero retrofit

thomas409661
May 19, 2021
1 min read

Mustbe0 projects is all about apartments buildings, so let's check out a realised high-rise project.

Housing organisation Portaal with construction company Dura Vermeer

After completion of successful net zero retrofits for single-family homes, Housing Organisation Portaal decided to moving on up to retrofit multi-story buildings. Together with construction company Dura Vermeer, a net zero deep retrofit for 110 apartments at the Kwangodreef, Gambiadreef and Kasaidreef in Utrecht was realised.

Portaal is one of the pioneers in realising net zero energy homes and has completed hundreds of them all over the Netherlands. Together with builder Dura Vermeer, also a frontrunner in this area of expertise, they again successfully delivered these multi-story apartment buildings. While the residents were at home, window frames were renewed, facades repackaged, new ventilation systems and PV panels installed and kitchens and bathrooms replaced.

Most important elements:

Energy use before the renovation: 3.245 kWh/m3 per year
Energy use after the renovation: 848 kWh/m3 per year
Ventilation by means of balanced ventilation with a Heat Recovery Unit
CO2 controlled (system D)
Entire shell thermally insulated:Roof: Rc= 7Closed façade: Rc = 6Open façade, triple glas: U-value = 0,9Ground floor: Rc = 4