Condensation on windows: why it appears and how to fix it in Gavà
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 Gavà
0–150 €
Diagnosis or vents.
Contexto local · Gavà
Outdoor winter humidity is high in Gavà.
Gavà splits into three very different areas. Gavà Centre is 1970s–80s urban housing where most jobs are bathroom refurbs, swapping old aluminium frames for thermally-broken PVC, and reinforcing the electrical panel. Gavà Mar mirrors Castelldefels' seafront, with the same salt exposure. Heading north toward Bruguers, semi-detached homes with garden and pool dominate, with scheduled maintenance (pool, heat pump, irrigation) as the most demanded service. Logistics are easy: wide streets and loading zones with no time limits outside the centre.
- Comarca: Baix Llobregat
- Población: 47.542 hab.
- Parque de vivienda predominante: unifamiliar
- Año medio de construcción: 1986
- Códigos postales: 08850
Frente de mar en Gavà Mar con casas unifamiliares, centro tradicional y la zona industrial de Les Massotes.
Preguntas frecuentes
Does condensation cause mould?
Yes, if continuous.
Do salt absorbers work?
For a room, insufficient.
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Más sobre Damp, mould and paint
Sources and regulation
- CTE DB-HS 1 — Protección frente a la humedad — Código Técnico de la Edificación