Yes, SYSTEM 3E walls can withstand prolonged exposure without being covered, thanks to their **low water absorption** compared to traditional materials. The material’s characteristics include:

• **Water absorption due to capillary rise**: After 10 minutes, only **40 g/m²·s^0.5**.
• **Dimensional stability**: Moisture expansion is **less than 0.30 mm/m**.
• **Water vapour permeability**: Diffusion resistance factor is **less than 15**.

 

These properties allow SYSTEM 3E walls to handle humid conditions **uncovered** for extended periods without compromising their structural integrity. However, if the surface is damaged, such as through cutting or chipping, it may absorb moisture more easily. Therefore, it’s recommended to protect exposed surfaces from physical damage to maintain their performance over time.