Damp patch on the wall in Castelldefels: how to identify the cause
Resumen rápido
Shape and location tell you if it's rising damp, condensation or a leak.
¿Qué está pasando?
Each type of damp has a different cause and fix.
Causas más probables
Rising damp from ground
mediaGround floors and basements.
Leak from neighbour or roof
mediaCeiling patch that grows with rain.
Condensation on cold outer wall
altaUninsulated corners.
Internal plumbing leak
mediaPatch grows with water use.
Pasos de diagnóstico
- 1
Look at position and shape
Floor=rising, ceiling=leak, corner=condensation.
- 2
Touch it: wet or just stained?
Tape clingfilm 24h: drops mean active damp.
- 3
Document with dated photos
Dated photos are your evidence.
Cuándo llamar a un profesional
Call for diagnosis if active or growing.
Coste orientativo en Castelldefels
60–350 €
Hygrometer diagnosis.
Contexto local · Castelldefels
Ground floors near the sea have rising damp.
Castelldefels mixes a seafront strip of villas and holiday flats with a dense town centre below the castle. Salt air is our worst enemy: in under five years it corrodes untreated aluminium blinds, lock cylinders and ironwork, so we always quote marine-grade parts. Second homes drive a lot of between-season work: deep cleans, AC and blind check-ups after winter, and discreet repairs during holiday lets. Up in Bellamar and Montemar we service villas with pools and heat pumps. The N-340 and C-32 jam early, so we keep first slots for nearby clients.
- Comarca: Baix Llobregat
- Población: 67.999 hab.
- Parque de vivienda predominante: unifamiliar
- Año medio de construcción: 1987
- Códigos postales: 08860
Predominio de chalets y unifamiliares en Bellamar y Montemar, con bloques modernos en Centre y Vista Alegre.
Preguntas frecuentes
Who pays if it's the upstairs neighbour?
Their insurance or the community.
Can I just paint over it?
Only if completely dry and fixed.
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Diagnóstico y presupuesto en Castelldefels normalmente el mismo día.
Pedir presupuesto gratisProblemas relacionados en Castelldefels
Más sobre Damp, mould and paint
Sources and regulation
- CTE DB-HS 1 — Protección frente a la humedad — Código Técnico de la Edificación