Waterproofing is one of the most critical measures protecting a building's structural system. A foundation that admits water even once can suffer corrosion and reinforced concrete damage for years. Waterproofing should therefore be seen as a basic condition of building safety, rather than an “extra cost”.
Foundation Waterproofing: Insurance for the Building
Water pressure and moisture from the ground constantly challenge the foundation. Without waterproofing, reinforcement corrosion accelerates and load-bearing capacity decreases. Positive and negative water pressure are decisive concepts in choosing the correct material.
- Suitable Materials: Bituminous membranes, crystalline coatings, liquid-applied waterproofing
- Critical Detail: The drainage system is as important as waterproofing
Terrace and Roof Waterproofing
Rainwater ponding on terraces and flat roofs causes cracks and leaks over time. The material's UV resistance, elasticity and correct welding of joints are vital here.
The Correct Layered System
- Surface preparation and screed laid to falls
- Vapour barrier layer
- Waterproofing membrane, in one or two layers
- Protection layer and covering
Common Waterproofing Mistakes
- Insufficient surface preparation
- Incorrect welding of joints
- Neglected details at drains and parapets
- Unsuitable material selection
Choosing Waterproofing Materials
Material selection must consider the application area, water pressure and maintenance conditions. For example, membranes with high UV resistance should be preferred on terraces.
Waterproofing Tests
A water test after installation is the best way to identify leakage risk at the outset. A 24–48-hour flood test is commonly performed on terraces.
Recommendations for a Lasting Solution
- Professional installation and inspection
- Special solutions at corners, drains and other details
- Drainage and water discharge systems
- Regular maintenance and periodic checks
Conclusion: Although foundation and terrace waterproofing may seem like a short-term expense, it is the most important investment in protecting the building over the long term.
