The treatment requires addressing the water source, not the indoor symptom. If the roof is degraded, the entire waterproofing needs renewal with new roofing felt or a liquid-applied polyurethane system. If the facade has structural cracks, they are sealed with elastic sealant and repainted with specific facade paint that covers micro-cracks. Only after ensuring exterior watertightness do we repair the interior wall. It depends on the linear meters of the affected wall. We provide a fixed quote after a diagnostic visit, with no obligation. Chemical injection, exterior waterproofing, breathable coating, or ventilation depending on the diagnosis.

Specific to properties on the seafront. Saltpetre settles on exterior walls, penetrating with moisture. It emerges as it evaporates, forming white or bluish patches that peel paint from the inside. The treatment involves washing with specific chemicals, neutralising remaining salts with anti-efflorescence products. Application of a siloxane-type paint system that allows the wall to breathe without letting water in. Formal guarantee on the treatment. If the damp reappears in the same spot, we return. This is dampness rising from the ground through walls due to the capillary action of porous materials. It manifests as a damp patch on the ground floor up to a metre high from the floor, often with white efflorescence (salts that crystallise as the water evaporates). It's typical in old ground-floor properties, especially in areas with a high water table near the sea.

The treatment involves adequate ventilation combined with interior thermal insulation. Installation of bathroom and kitchen extractors with the correct airflow, cross-ventilation of rooms. In severe cases of very cold walls, application of interior insulation with sprayed cork or sandwich panels. Without solving the cause (vapour that cannot escape), any applied paint will blacken again. This is water entering from the outside due to defects in the flat roof waterproofing, poorly sealed structural joints, or degraded exterior paint. It manifests as patches on the ceiling or upper parts of interior walls, often coinciding with rainy periods. Rising damp: a patch that rises from the floor up to a metre high, with white efflorescence. Water ingress: a patch that descends from the ceiling or high corners, coinciding with rain.

The price for partition walls and masonry in La Trinitat Nova typically ranges between €186 and €5400. The final figure depends on the property's condition, materials, and labour time. We always provide a fixed quote before starting. Call us, message us on WhatsApp, or request your quote online — we'll respond in under 10 minutes during business hours. Select the service you need for more details and to request a quote.