Damp patch on the wall in Barcelona: 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 Barcelona
60–350 €
Hygrometer diagnosis.
Contexto local · Barcelona
Ground floors near the sea have rising damp.
Barcelona is the bulk of our work and demands judgement: Eixample is full of modernista buildings with 3 m+ ceilings, original gotelé render, electrics with no RCD and cast-iron stacks still in service — all of which stretch any refurb. Gràcia and Sant Antoni are dominated by 1930s–60s flats with hydraulic-tile floors we have to protect before touching walls. Ciutat Vella adds narrow building entrances and BCN ASIA façade rules, so we coordinate scaffolding and permits when needed. Sant Martí (22@) is another world: new-builds and offices converted to lofts that drag along under-sized electrical panels. The ZBE low-emission zone and AREA paid parking push us to load/unload early to keep costs down.
- Comarca: Barcelonès
- Población: 1.660.122 hab.
- Parque de vivienda predominante: piso-eixample
- Año medio de construcción: 1955
- Códigos postales: 08001, 08002, 08003, 08004, 08005, 08006, 08007, 08008, 08009, 08010, 08011, 08012, 08013, 08014, 08015, 08016, 08017, 08018, 08019, 08020, 08021, 08022, 08023, 08024, 08025, 08026, 08027, 08028, 08029, 08030, 08031, 08032, 08033, 08034, 08035, 08036, 08037, 08038, 08039, 08040, 08041, 08042
Capital catalana con un parque de viviendas dominado por pisos del Eixample, fincas modernistas y bloques de los 60–70 en distritos como Sant Andreu o Nou Barris.
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.
¿Prefieres que vayamos nosotros?
Diagnóstico y presupuesto en Barcelona normalmente el mismo día.
Pedir presupuesto gratisProblemas relacionados en Barcelona
Más sobre Damp, mould and paint
Sources and regulation
- CTE DB-HS 1 — Protección frente a la humedad — Código Técnico de la Edificación