Våtrom

Våtrom is a term in Norwegian building practice for rooms where water exposure and high humidity are expected, such as bathrooms, shower rooms, and laundry rooms. These spaces are designed with enhanced moisture protection to prevent water penetration and moisture-related damage, and they are governed by building regulations and standards that specify waterproofing and ventilation requirements.

Key requirements include a continuous moisture barrier on both floors and walls, an impermeable waterproofing layer beneath the finishing materials, proper drainage with a floor slope toward a drain, and sealed junctions at transitions (for example between wall and floor and around penetrations). The substrate is typically moisture-resistant or designed to stay dry. Finishing materials in våtrom are chosen for water resistance, commonly ceramic tiles or water-rated vinyl, with appropriate sealants at joints and around fixtures. Ventilation is important to control humidity and reduce mold risk.

Planning and inspection are important: våtrom design should anticipate potential leaks, and building codes require verification of waterproofing performance during construction and after completion. In the event of water damage, remedial work can be extensive, including removal and replacement of finishes and repair of structural components.

Maintenance involves regular inspection of waterproof layers, grout and sealants, drainage, and ventilation. Early signs of moisture intrusion, such as discoloration or damp spots, should prompt professional assessment. The concept extends to any area with persistent moisture exposure within a building.