Condensation on windows: why it appears and how to fix it in Terrassa
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 Terrassa
0–150 €
Diagnosis or vents.
Contexto local · Terrassa
Outdoor winter humidity is high in Terrassa.
Terrassa has a strong industrial identity: 19th-century textile factories have been converted into lofts and offices in Can Boada and l'Antic Poble de Sant Pere. There we work with 5 m ceilings, wrought-iron beams and original slabs that can't take big point loads — any mezzanine hangs off new steelwork. The rest of the city is 1970s–80s mid-rise with the usual insulation issues. At ~280 m altitude winters are cold and heating demand — heat pumps, biomass, boilers — is high. C-58 access dictates booking order: first slots local, second slots Barcelona.
- Comarca: Vallès Occidental
- Población: 223.627 hab.
- Parque de vivienda predominante: piso-moderno
- Año medio de construcción: 1972
- Códigos postales: 08221, 08222, 08223, 08224, 08225, 08226, 08227, 08228
Antigua capital textil con barrios densos (Ca n’Anglada, Sant Pere Nord) y zonas residenciales en Can Boada y Les Fonts.
Preguntas frecuentes
Does condensation cause mould?
Yes, if continuous.
Do salt absorbers work?
For a room, insufficient.
¿Prefieres que vayamos nosotros?
Diagnóstico y presupuesto en Terrassa normalmente el mismo día.
Pedir presupuesto gratisProblemas relacionados en Terrassa
Más sobre Damp, mould and paint
Sources and regulation
- CTE DB-HS 1 — Protección frente a la humedad — Código Técnico de la Edificación