Condensation Control & Ventilation Systems
Condensation control Porto tenants complain about is often mislabelled rising damp. When relative humidity exceeds 70% for 6+ hours daily — common in unventilated Ribeira flats — mold appears on upper corners while the skirting stays dry.
What is included
- Dew-point and humidity logging (7-day data loggers)
- Differentiation report: condensation vs rising damp vs leak
- PIV (positive input ventilation) sizing and install
- Bathroom/kitchen extractor upgrades to Building-reg equivalent airflow
- Thermal bridge identification with infrared survey
- Landlord-ready remediation letter
Why this matters for your property
Treating condensation with a DPC wastes €1,500–€3,000. Treating rising damp with only a fan leaves salts in the wall.
Local expertise across Porto metro
North-facing apartments in Cedofeita and Bonfim with single glazing see dew points from October through April — we size ventilation for Atlantic humidity, not inland UK assumptions.
FAQ
45–55% relative humidity at 20°C reduces mold risk. Loggers we install show hourly peaks your thermostat cannot display.
Yes, ducted and wall-mounted PIV options exist when no loft space is available — typical for Porto vertical housing.
Our condensation package includes environmental monitoring. A standard damp survey focuses on wall moisture profiles at the base.
Insurers may reduce payouts if passive ventilation standards are not met. We document pre- and post-intervention humidity for claims files.