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Damp patch on the wall in Barcelona: how to identify the cause
Riesgo medio · con precaución
Resumen rápido
Shape and location tell you if it's rising damp, condensation or a leak.
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¿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.
Want us to take a look? Fixed quote within 24 h.
Coste orientativo
60–350 €
Hygrometer diagnosis.
Contexto local
Ground floors near the sea have rising damp.
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.
Related problems
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