Where is the membrane applied? 

Ensure that all work is carried out on a sound, dry, stable structure capable of supporting the additional load.

The membranes must be installed in accordance with best practice, ensuring they are airtight/watertight and complying with the regulations in force in the country.

This tool is applicable to residential buildings in areas with low or medium humidity (excluding swimming pools, saunas, etc.).

Ensure compliance with the fire safety standards in force in the country, particularly for buildings other than single-family dwellings.

This tool is applicable for the Benelux countries and the lowland climates of France.

This decision tree only considers the physical building layer — always verify structural and safety aspects before installation.