Is it a roof leak, plumbing leak or condensation? The pattern, location and timing can provide clues, but they do not prove the source. Water that follows rain may point to roof, cladding or window entry; dampness that follows shower or laundry use may point to plumbing; widespread winter moisture on cold surfaces is often condensation. Use a qualified professional to investigate the cause.
Compare the pattern before assuming the cause
| Pattern | Possible cause | Appropriate next step |
|---|---|---|
| Mark appears or worsens after rain near roof, window or external wall | Roof, flashing, cladding or window entry | Qualified roofer, builder or building professional |
| Dampness changes after shower, dishwasher, laundry or cylinder use | Plumbing fixture or pipe leak | Qualified plumber |
| Water is widespread on windows and cold surfaces on cold mornings | Condensation and indoor humidity | Ventilation and humidity control |
What thermal imaging and moisture readings add
Thermal imaging may show a surface-temperature pattern that helps choose where to take moisture readings. It does not prove whether the source is rain, plumbing, draughts, insulation or another cause. Accessible moisture readings can support an investigation but do not replace it.
Illustrative scenario: a ceiling mark after heavy rain
Illustrative scenario, not a customer result. A ceiling mark becomes more visible after rain. A thermal image identifies a cooler surrounding area, but the same pattern might also be influenced by roof void temperature. The owner uses a qualified roofing or building professional to investigate the entry point before considering any drying plan.
When Dry Me Now equipment hire may be suitable
Only after the source is stopped and a clean-water event is contained. For a suitable situation, drying fans move air across damp materials while a dehumidifier helps control room humidity. A practical thermal image and moisture assessment may be included where suitable with the Drying Combo. It does not diagnose or repair the leak.
Read how to do a water-meter leak test, hidden water-leak signs and when an assessment-led restoration approach is needed.
Frequently asked questions
Can thermal imaging tell whether a roof is leaking?
No. It may highlight a surface pattern for further checking, but it cannot prove an entry point or replace roof and building investigation.
How can I tell condensation from a leak?
Condensation often affects cold surfaces more widely and is worse on cold mornings. Localised moisture near plumbing or a mark that follows rain needs investigation.
Should I dry a wall before the leak is fixed?
No. Stop and repair the source first. Drying equipment cannot resolve active water entry.