Porto · Condensation Control

Condensation control for north-facing Porto apartments

Not every damp patch in Porto is rising damp. North bedrooms in Cedofeita and Ramalde show condensation after cold Atlantic nights — ventilation sizing prevents €2,000+ misapplied injection.

Cross-section diagram of DPC injection in granite masonry — Granite walls in Porto are slow to warm. Surface condensation on cold stone is common — we distinguish this from interstitial condensation with thermal imaging.

Local masonry challenge in Porto

Porto's narrow streets reduce purge ventilation. Ground-floor flats with single glazing and no extractor fans show mold on upper walls while skirting areas read dry.

Landmarks and neighbourhoods we cover

Douro riverfront warehouses, São Bento station granite blocks, Clérigos tower vicinity

Cedofeita north-facing blocks
Ramalde post-war apartments
Paranhos student rentals

What we deliver on site

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

Typical timeline: Humidity logging: 7 days. PIV installation: 1 day. Full dry-down: 2–4 weeks.

Local FAQ

Yes — we size units for single-room or whole-flat applications. Extractor upgrades may be needed in kitchens.

Book a survey with vertical moisture profiling — condensation shows dry skirting with wet upper corners.

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