Archello Awards 2026 · Enter your projects before 30 September 2026
Archello Awards 2026 · Enter your projects before 30 September 2026
  • Homogenous wall build-up
  • Breathable and highly vapour permeable
  • Prevents condensation from water vapour
  • Ensures a comfortable indoor living climate
  • Reduces building time as it dries out more quickly

Whether you are building a new home or refurbishing an old one, Baumit OpenSystem is always the best solution.  All components are vapour permeable and thus allow the walls to breathe.  
This creates optimal living conditions whether in summer or winter. The Baumit OpenSystem uses EPS boards containing numerous holes of about 2 to 3 mm diameter. These ensure the high vapour permeability and enable water vapour to be released to the outside.

99 % air
The heart of Baumit OpenSystem stands out due to its very low primary energy consumption during production: The OpenSystem consists of 99 % air and only a small proportion of EPS, which in turn requires very little energy to produce. 
This is very positive in terms of the environmental impact, because the less energy that is used to produce thermal insulation, the more environmentally-friendly the thermal insulation system is. 

How it works
In addition to the temperature, an important factor in enabling a comfortable living climate to be created is relative humidity. At indoor temperatures of between 19 and 22° C, humidity should be between 40 to 60 %. Approximately 10 litres of water vapour per household per day need to be diff used to the outside. Baumit OpenSystem with its high breathability (similar to brick) ensures a comfortable indoor climate. 

A facade that lasts
The Baumit OpenSystem has some notable features that will help your building to not only perform well but also to look good for many years to come. 
The Baumit OpenSystem ombines the best fi xing technology, vapour permeability, high performance insulation and an innovative topcoat with nanotechnology. It helps to create a building that will last for decades.

SYSTEM COMPONENTS
Baumit NanoporTop Self-cleaning topcoat render
Baumit PremiumPrimer Superior quality primer
Baumit openContact Vapour permeable adhesive and basecoat reinforcing mortar
Baumit StarTex High performance reinforcing mesh
Baumit OpenTherm 031 Vapour permeable EPS facade insulation board
Baumit StarTrack Unique supplementary anchor fi xing






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Baumit openSystem
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