Dampremmen

Dampremmen are materials or systems used in building construction to limit the diffusion of water vapor through walls, roofs, and floors. They function as vapor barriers or vapor retarders, helping to control condensation, reduce the risk of mold, and improve energy efficiency within a building envelope.

In cold and temperate climates, dampremmen are typically installed on the warm side of insulation to prevent moist indoor air from reaching cooler surfaces where it could condense. Their effectiveness is described by their permeance: true vapor barriers have very low permeance, while vapor retarders allow limited diffusion. Proper performance depends on continuous coverage and careful sealing at joints, edges, and around penetrations.

Materials commonly used for dampremmen include polyethylene plastic films, aluminum or metallized foils, and specialized vapor-retarder products. Some constructions incorporate dampremmen as an integral part of wall or roof assemblies, such as foil-faced boards or membranes behind interior finishes. The choice of material depends on climate, building type, and moisture management strategy.

Installation considerations are essential: dampremmen should be placed correctly relative to insulation and ventilation, with attention to potential moisture sources and drainage paths. Gaps, tears, or improper detailing around corners, outlets, and doors can compromise performance and lead to moisture problems.

Regulatory standards and building codes dictate maximum permeance requirements and installation practices for dampremmen. Improper use or poor installation can contribute to condensation, wood decay, and indoor air quality issues, underscoring the importance of proper design and workmanship in their application.