Waterproofing of underground structures in contact with water
Waterproofing of underground structures in permanent contact with water
Underground structures such as garages, technical rooms, foundations, tunnels, and retaining walls are constantly exposed to moisture, infiltration, and hydrostatic pressure from the surrounding soil.
Waterproofing of underground structures is therefore essential to protect durability, safety, and the integrity of concrete, preventing leaks, finish detachment, and structural compromise. Interventions must be carried out with specialised systems, effective even in the presence of active water or high hydraulic pressure, delivering long-lasting results without invasive demolition.
Typical challenges in the sector
Working on underground structures is one of the most complex tasks in waterproofing, due to several technical and operational factors:
Constant water pressure: infiltration comes not only from rain but also from groundwater and soil moisture, exerting continuous and unpredictable pressure.
Limited access from the outside: excavation or intervention on external walls is often impossible, requiring highly specialised internal solutions.
Presence of joints and critical points: construction joints, pipe penetrations, structural nodes, and cracks are the most vulnerable areas.
Severe environmental conditions: humid environments, confined spaces, irregular surfaces, and the presence of active water require appropriate techniques.
Compatibility with existing structures: interventions on occupied buildings must avoid major demolition and cannot compromise stability or operational use.
FES Global Group’s approach
FES S.p.A. specialises in waterproofing underground structures, using targeted technologies effective even in the presence of active water or high hydrostatic pressure.
Comprehensive technical diagnosis: mapping infiltration points, identifying causes, analysing joints and structural defects.
Internal waterproofing systems:
Injection of expansive polyurethane resins to block active water
Elastic joint sealing with resins or hydrophilic tapes
Crystalline cementitious and waterproof coatings
Epoxy or polyurethane cycles for high-pressure surfaces
Interventions in the presence of water: specialised technicians apply fast-acting resins capable of stopping even significant flows.
Treatment of construction details: pipes, inspection chambers, construction joints, and cracks are waterproofed with dedicated and certified systems.
Durable and controlled solutions: every intervention is tested to ensure long-term effectiveness of the waterproofing.
The added value of FES S.p.A.
Thanks to specialised expertise and cutting-edge technologies, FES S.p.A. guarantees definitive interventions even under the most challenging conditions, without external excavation. Our experience in underground waterproofing allows us to offer solutions that ensure water tightness, durability, and full structural protection, significantly reducing risks and future maintenance costs.