vesieristys

Vesieristys, or waterproofing, refers to the processes and materials used to prevent water intrusion in structures and components such as foundations, basements, roofs, balconies, and wet rooms. Its primary goal is to protect structural integrity, reduce moisture-related damage, and control dampness within buildings.

Common methods include exterior sheet membranes (bituminous, PVC, or polyethylene-based), interior waterproofing membranes, cementitious waterproofing coatings, and liquid-applied membranes (such as polyurethane or acrylic systems). A drainage layer and damp-proof course are often integrated, and detailing around penetrations, joints, and terminations is essential. External waterproofing typically relies on a drainage plane and proper backfilling, while interior approaches may involve sump systems and liquid membranes applied to concrete surfaces.

Key considerations include thorough substrate preparation, appropriate temperature during installation, and the compatibility of materials with concrete and existing substrates. Hydrostatic pressure and capillary action can challenge waterproofing performance, so connections to drainage, ventilation, and structural joints are critical. Installations usually involve ensuring seamless seams, correct overlaps, and careful detailing at corners, penetrations, and transitions. Quality control measures often include on-site testing and, in some cases, pressure or flood tests to verify integrity.

Applications span basements and foundations, roofs and terraces, balconies, and wet rooms such as bathrooms. Maintenance is important and may involve inspecting for cracks, delamination of membranes, or drainage blockages, with re-waterproofing warranted after significant cracking, movement, or damage.

See also: damp-proof course; waterproofing membrane; hydrostatic pressure.