The Building Industry’s Wet Room Norm (BVN) is a voluntary industry standard that provides clear guidelines on how wet rooms such as bathrooms, laundry rooms, and shower rooms should be constructed. It presents concrete solutions and describes step by step how the work should be carried out to ensure that the wet room is waterproof, functional, and durable.
BVN was created because wet rooms were previously built in various ways – often with errors or poor solutions that led to leaks, rot damage, and costly repairs. To address this issue, the construction industry and insurance companies collaborated to establish a common standard for how wet rooms should be built. The norm is based on both experience and research and is regularly updated to adapt to new materials, methods, and requirements.
BVN is designed as a practical handbook covering the entire process of building a wet room – from planning to completion. It includes
For craftsmen, BVN serves as a guide – a professional checklist that ensures everything is done correctly, step by step. It helps them choose the right products and solutions while providing clear guidelines on how the work should be carried out and documented. For customers, a bathroom built according to BVN means:
BVN is a voluntary industry standard, but it has become the natural choice for professional craftsmen because it provides:
