EN 1931: Water Vapor Permeability and Waterproofing for Building Materials

 

The EN 1931 standard specifies methods for determining the water vapor permeability and waterproofing characteristics of building materials, especially those used in construction membranes and insulating products. This standard is essential for assessing the moisture barrier properties of materials used in construction, which directly impacts energy efficiency, indoor air quality, and overall building durability. Compliance with this standard ensures that materials meet the necessary benchmarks for moisture control and waterproofing in various building applications.

Main Testing Methods in EN 1931

The EN 1931 standard outlines several testing methods for evaluating water vapor permeability and waterproofing:

Water Vapor Transmission under Specific Conditions

This method measures the rate at which water vapor can pass through a material under controlled humidity and temperature conditions. It provides precise data essential for understanding a material’s permeability level.

Resistance to Water Vapor Diffusion

This method determines the resistance of a material to water vapor diffusion, which is crucial for selecting materials that serve as effective moisture barriers, especially in insulation applications.

Waterproofing Evaluation

This method evaluates a material’s waterproofing properties to ensure it provides adequate protection against moisture ingress, an important feature for roofing membranes and outdoor applications.

 

Application Areas of the EN 1931 Standard

The EN 1931 standard is widely applicable across various sectors of the construction industry:

EN 1931-Certified Machines

Here are five machines that comply with the EN 1931 standard, suitable for testing water vapor permeability and waterproofing properties: