Europe’s objective is to achieve climate neutrality by 2050, an economy with net-zero greenhouse gas emissions, through the deep decarbonisation of all sectors.

More than 220 million building units were built before 2001 (85% of building stock) with low or no energy standard criteria and most of them will still be standing in 2050.

The oldest, non-renovated buildings are usually less energy efficient, and require more energy to keep indoor environmental conditions.  In addition, they are often occupied by lower income families which face problems to pay energy bills, which means that the indoor hygro-thermal conditions are far from the comfort range, leading to health problems.


The building envelopes combine a package of solutions including:
  • Improved ventilation: air ducts connected to a central heat-pump and smart windows
  • insulation: biobased thermal insulation and acoustic insulation
  • Bio-composite/bio-resources profile systems and cladding
  • renewable energy generation: flexible PV system and PVT panels
  • electric storage technologies: second life batteries