The treatment requires addressing the source of the water, not just the interior symptom. If the roof is degraded, the entire waterproofing must be renewed with new asphalt felt or a sprayed liquid polyurethane system. If the façade has structural cracks, they are sealed with elastic sealant and repainted with specific façade 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 diagnosis. Rising damp, roof leakage, internal condensation and saltpetre efflorescence. Diagnosis before action.

There are four types of dampness that 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 diagnostic technical visit before quoting anything. The difference between treating dampness well or poorly changes the durability of the result from five years to six months. The most common mistake with dampness is to repaint the affected wall. It works for the first month, and then the dampness reappears, worse than before. Now the new paint creates a barrier that traps water inside the wall. Dampness is not cured by painting. It is cured by identifying the origin of the water and cutting it off at its entry point. Only then do we repair the wall with the appropriate technique and repaint. Formal guarantee on the treatment. If the dampness reappears at the same spot, we return.

This is dampness that forms when humid indoor air touches a cold surface. Typical in kitchens and bathrooms without adequate ventilation, also in rooms exposed to north-facing facades that cool down more in winter. It manifests as water droplets on windows, cold corners of rooms, black mould spots in cold areas of walls. This is water entering from the outside due to defects in flat roof waterproofing, poorly sealed structural joints, or degraded exterior paint. It manifests as stains on the ceiling or upper part of interior walls, often coinciding with periods of rain. The treatment is chemical barrier 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 capillarity. Over this barrier, we can repair and repaint with a breathable paint system. We guarantee the treatment for 5 years.

The price for Venetian plastering in Montornès del Vallès usually ranges between 147 and 1525 euros. The final figure depends on the condition of the property, materials, and labour time. We always provide a fixed quote before starting. Call us, WhatsApp us, or request your quote online — we respond in less than 10 minutes during working hours. Depends on the linear metres of affected wall. We provide a fixed quote after a diagnostic visit, with no obligation.