Drainroof: 43 % energy savings

Drainroof is a cost-effective solution that lowers the energy consumption of a building by 43 %. Existing building stock can substantially enhance energy efficiency by retrofit solutions. For example, a residential building of 160 m2 by installing an extensive sedum roof garden with Drainroof would lower the energy consumption by 43 %. This is equivalent to over 1 ton of CO2 less per year for a single building.

Annual energy savings

NO green roof

4,920 kWh

8 cm extensive Drainroof

2,805 kWh

SAVINGS with Drainroof


NO green roof

4.920 kWh

8 cm extensive Drainroof

2.805 kWh

SAVINGS with Drainroof

43 % kWh


By adding Drainroof, both commercial and residential buildings could reduce the carbon footprint and lower CO2 emissions into the atmosphere. If this energy-efficient solution were to be applied throughout the country, we could make an important contribution to achieving the targeted CO2 emissions established by the European Union for 2030.

Learn more about Drainroof

Green solutions
Marina Casablanca Center, Morocco
Dell’ Angelo Hospital Green Roof, Venice, Italy

Learn more on green retrofits

How our Green and Water solutions together increase property value
Energy cost savings with Geoplast green solutions
How to reduce cement CO2 emissions
What if 56,000 km2 of parking lots were green?