The treatment requires addressing the source of the water, not the internal symptom. If the roof is degraded, the entire waterproofing must be renewed with new asphaltic membrane or a liquid-cast 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 the external watertightness do we repair the interior wall. It depends on the linear metres of 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 homes on the front line of the sea. Saltpetre deposits on exterior walls, penetrating with moisture. It emerges upon evaporation, forming white or bluish stains that peel paint from the inside. The treatment involves washing with specific chemical products, 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 will return. There are four types of damp that we commonly see on the Costa Blanca, each with a different cause, diagnosis, and treatment. Mistaking 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.

30-day workmanship guarantee from us. Official manufacturer's guarantee (2-5 years depending on brand) on the sanitary ware. Official manufacturer's guarantee on the sanitary ware plus our workmanship coverage. This is water entering from the outside due to defects in roof waterproofing, poorly sealed structural joints, or degraded exterior paint. It manifests as stains on the ceiling or upper parts of interior walls, often coinciding with rainy periods.

The price for waterproofing in Porta typically ranges between €170 and €5000. The final figure depends on the property's condition, materials, and work time. We always provide a fixed quote before starting. Call us, message us on WhatsApp, or request your quote online – we'll reply in under 10 minutes during business hours. Select the service you need for more details and to request a quote.