Condensation on windows: why it appears and how to fix it in Cerdanyola del Vallès
Resumen rápido
Condensation is indoor air water cooling on the cold glass.
¿Qué está pasando?
The air in the room has too much humidity.
Causas más probables
Lack of ventilation
altaSealed flats without airing trap vapour.
Cold window, no thermal break
altaOld aluminium or single glazing.
Drying laundry indoors
altaOne load releases 2–3 L of water.
Poorly set heating
mediaHigh temp + closed windows.
Pasos de diagnóstico
- 1
Air the rooms for 10 minutes
Open opposite windows.
- 2
Wipe the glass and measure humidity
A hygrometer costs €8–15.
- 3
Cover pots and use the extractor
Cooking uncovered releases litres of vapour.
- 4
Dry laundry outside or with window open
If not, a dehumidifier.
Cuándo llamar a un profesional
If it persists with low humidity, check the carpentry.
Coste orientativo en Cerdanyola del Vallès
0–150 €
Diagnosis or vents.
Contexto local · Cerdanyola del Vallès
Outdoor winter humidity is high in Cerdanyola del Vallès.
Cerdanyola del Vallès has a building mix shaped by its university-town role: 1970s–80s flats in Centre and Banús let frequently to lecturers and students, which drives high demand for quick repairs between tenants. In Cerdanyola Nord and Bellaterra semi-detached homes with shared pools dominate. The UAB campus and the technology park also generate small refurbs in shared flats and converted offices. AP-7/B-30 congestion pushes us to morning visits for local clients.
- Comarca: Vallès Occidental
- Población: 57.892 hab.
- Parque de vivienda predominante: mixto
- Año medio de construcción: 1985
- Códigos postales: 08290
Mezcla universitaria (UAB) con barrios residenciales en Bellaterra y bloques en Canaletes.
Preguntas frecuentes
Does condensation cause mould?
Yes, if continuous.
Do salt absorbers work?
For a room, insufficient.
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Pedir presupuesto gratisProblemas relacionados en Cerdanyola del Vallès
Más sobre Damp, mould and paint
Sources and regulation
- CTE DB-HS 1 — Protección frente a la humedad — Código Técnico de la Edificación