Achieving EU’s energy-efficiency targets (2050 goals) depends on the right measures to retrofit existing building stock, which
is dominated by residential buildings. Approximately 85% of the existing dwellings were built before 1990 with poor façade and roof insulation. Due to this weakness much energy is wasted when operating auxiliary heating, ventilation and air conditioning installations. Current retrofitting attempts by increasing
envelope thickness bring negative consequences like too high airtightness, over-heating, poor ventilation and loss of space due to voluminous retrofit units.

ADAPTIWALL solves this problem by using nanotechnology to develop a multifunctional and climate adaptive panel for energy-efficient buildings. This novel panel consists of 3 elements:

  1. Lightweight concrete with nanoadditives for efficient thermal storage and load bearing capacity.
  2. Adaptable polymer materials for switchable thermal resistance.
  3. Total heat exchanger with nanostructured membrane for
    temperature, moisture and anti-bacterial control.

ADAPTIWALL panel is innovative due to its lightweight design and quick low-costinstallation; switchable thermal resistance for heat exchange and storage; highly improved energy efficiency; and suitability to be used for façade or roof in cost-efficient retrofitting and new buildings in different European climate regions.

When used for façades, ADAPTIWALL panels reduce the building’s energy consumption by more than 50% in comparison with conventionalretrofitting. Their ventilation and heat exchange properties significantly contribute to create a healthy and comfortable indoor climate, while eliminating the need for auxiliary installations.

The ADAPTIWALL research project focuses on developing adaptive (nano)materials; applying the materials in a lightweightpanel; enhancing the panel’s structural, fire safety and sound insulation properties; and demonstrating the novel prefabricating systems to European construction industry.


Facts & Figures

  • Full name: Multi-functional light-weight WALL panel based on ADAPTive Insulation and nanomaterials for energy efficient buildings
  • Acronym: ADAPTIWALL
  • Duration: 48 months
  • Start date: 1 September 2013
  • Total budget: 5.05 M€ EC
  • Funding: 3.35 M€



  • Reduce heating and cooling demands with
    50% to over 80% compared to current
    highly insulating solutions,
  • Drastically reduce (> 75%) and eventually eliminate auxiliary heat recovery and ventilation installations,
  • Reduce envelope thickness by at least 30%
    and weight by 50% to save space and
    reduce dead load
  • Fulfill the load bearing, fire safety and sound insulation functions in one single