It depends on the linear metres of wall affected. We provide a fixed quote after a diagnostic visit, with no obligation. The treatment requires addressing the source of the water, not the internal symptom. If the roof is degraded, the entire waterproofing needs to be redone with new asphalt 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 guaranteeing external watertightness do we repair the interior wall. Chemical injection, external waterproofing, breathable coating, or ventilation depending on the diagnosis.

This is dampness that forms when humid indoor air comes into contact with a cold surface. Typical in kitchens and bathrooms without adequate ventilation, also in rooms exposed to north-facing facades which get colder in winter. It manifests as water droplets on windows, cold room corners, and black mould spots on cold wall areas. This is dampness that rises 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 height of one metre from the floor, often with white efflorescence (salts that crystallise as the water evaporates). It is typical in old ground-floor properties, especially in areas with a high water table near the sea. There are four types of damp we commonly see on the Costa Blanca, each with a different cause, diagnosis, and treatment. Confusing them inevitably leads to ineffective treatments and wasted money. That's why we always start with a technical diagnostic visit before providing any quote. The difference between treating dampness correctly or incorrectly changes the durability of the result between five years and six months.

Rising damp: a stain that rises from the floor up to one metre high, with white efflorescence. Penetrating damp: a stain that descends from the ceiling or high corners, coincides with rain. Torrevieja Orihuela Costa Guardamar Ciudad Quesada Pilar Horadada Almoradí Los Montesinos San Miguel Callosa Santa Pola See the 22 areas The treatment is adequate ventilation combined with interior thermal insulation. Installation of bathroom and kitchen extractors with the correct flow rate, cross-ventilation for rooms. In severe cases with very cold walls, application of interior insulation with projected cork or sandwich panels. Without addressing the cause (vapour that cannot escape), any applied paint will turn black again.

The price for plastering and rendering in La Trinitat Nova typically ranges between €160 and €3400. The final amount depends on the property's condition, materials, and work time. We always provide a fixed quote before starting. We have verified professionals available in under 2 hours. Choose the service and request a quote. Call us, message us on WhatsApp, or request your quote online — we'll reply in under 10 minutes during business hours.