Rising damp, roof water ingress, internal condensation, and saltpetre efflorescence. Diagnosis before action. Chemical injection, external waterproofing, breathable coating, or ventilation, depending on the diagnosis. Treatment requires addressing the water's origin, not the internal symptom. If the roof is damaged, the entire waterproofing needs renewal with new asphalt membrane or a sprayed liquid 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 internal wall.

Formal guarantee on the treatment. If the damp reappears in the same spot, we will return. This is damp 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 one metre 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. We commonly see four types of damp 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 quoting anything. The difference between treating damp correctly or incorrectly changes the result's durability from five years to six months.

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The cost of a bathroom renovation in Sarrià-Sant Gervasi typically ranges from €158 to €3950 as a guide. The final figure depends on the property's condition, materials, and labour time, and we always finalise it after seeing photos or —if you prefer— a site visit, with no obligation. In the area, the market average is around €550 for similar jobs; we are usually below this when the property's condition allows. It depends on the linear meters of affected wall. We provide a fixed quote after a diagnostic visit, with no obligation. Call us, message us on WhatsApp, or request your quote online — we respond in under 10 minutes during business hours.