Work out what is causing the damp.

Start with what you can see, where it appears and when it gets worse. DampDeck then compares the pattern with the most plausible moisture routes.

✓ No treatment selling✓ Symptom-led✓ Evidence before spend

01 What can you see?02 Where is it?03 When is it worst?04 Compare likely causes

Three questions. A better starting point.

Describe the moisture pattern.

This tool ranks likely cause families. It does not replace an on-site survey where the evidence is unclear or the work could be costly.

Takes about 30 seconds

1. Symptom2. Location3. Timing4. Result

Visual clues

Use these as pattern examples only. A photograph cannot prove the cause on its own.

Humidity / cold surfaces

Often strongest around cold corners, windows and poorly ventilated rooms.

Rain-related moisture

Weather-linked patches can point towards roofs, gutters, masonry or openings.

Low-level wall moisture

Low-level staining and salts deserve careful checks before any DPC treatment.

Make the diagnosis stronger

A few observations can make a professional visit more useful and help you avoid buying the wrong treatment.

01Photograph the areaTake a wide shot and a close-up, then repeat if it changes.

02Record when it worsensRain, cold weather, showers, laundry and heating patterns all matter.

03Look nearbyCheck pipes, seals, gutters, external defects and cold surfaces.

04Measure with contextHumidity and moisture readings add evidence; they do not diagnose the source alone.

What happens next?