Rising damp, roof leaks, internal condensation, and efflorescence from saltpetre. Diagnosis before action. Chemical injection, external waterproofing, breathable coating, or ventilation depending on the diagnosis. The treatment requires addressing the water source, not the internal symptom. If the roof is degraded, the entire waterproofing must be renewed 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 guaranteeing external watertightness do we repair the interior wall.

The most common mistake with damp is repainting the affected wall. It works for the first month and then the damp reappears, worse than before. Now the new paint creates a barrier that traps water inside the wall. Damp isn't cured by painting. It's cured by identifying the water source and stopping it at its entry point. Only then do we repair the wall with the appropriate technique and repaint. 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 quoting anything. The difference between treating damp correctly or incorrectly changes the durability of the result between five years and six months. This is water rising from the ground through the walls due to the capillary action of porous materials. It manifests as a damp stain on the ground floor up to a height of one metre from the floor, often with white efflorescence (salts that crystallize as the water evaporates). It is typical in old ground-floor properties, especially in areas with a high water table near the sea.

Removal of damaged coating, neutralisation of salts, and application of a compatible paint system. The treatment is a barrier chemical injection. We drill small holes at the base of the wall at regular intervals and inject a resin that penetrates the wall and forms a horizontal waterproofing barrier. This barrier prevents water from continuing to rise by capillary action. Over this barrier, we can repair and repaint with a breathable paint system. We guarantee the treatment for 5 years. 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 stains on the ceiling or the upper part of interior walls, often coinciding with rainy periods.

The price for bathroom renovation in La Trinitat Nova typically ranges between €158 and €3,950. The final figure depends on the property's condition, materials, and working time. We always provide a fixed quote before starting. It depends on the linear metres of wall affected. We provide a fixed quote after a diagnostic visit, with no obligation. Call us, write to us on WhatsApp, or request your quote online — we will respond in under 10 minutes during business hours.