Condensation or Leak?
A damp patch or musty smell can point to either — answer a few quick questions about what you're seeing to get a rough read, built from the same comparison in our loft ventilation guide. A starting point, not a diagnosis.
For each one, pick whichever sounds closer to what you're seeing:
Answer at least one question above to get a rough read.
Frequently Asked Questions
Is mould in the loft always caused by poor ventilation?
Not always, but it's one of the more common causes, alongside an actual leak that's been present for a while. Either way, visible mould is worth having looked at rather than simply cleaned and left, since it tends to indicate an ongoing moisture source rather than a one-off.
Can condensation and a leak both be happening at once?
Yes — it's genuinely possible for both to be present on the same roof, which is exactly why neither column in the comparison is a certain diagnosis on its own. A proper loft inspection is the reliable way to confirm what's actually happening.
What should I do while I wait to get it checked?
If it's safe to do so, keep an eye on whether the damp changes with rainfall over the next few days — that alone is often the clearest signal. Avoid going into the loft or onto the roof yourself in the meantime.
Does RoofEnquiry diagnose roof problems?
No. RoofEnquiry is an enquiry and matching service — we don't employ roofers or carry out roofing work ourselves. An inspection enquiry may be shared with independent roofing professionals covering your area, who can confirm what's actually happening.
Want a Proper Diagnosis?
Submit your enquiry in around 60 seconds and it may be shared with independent roofing professionals covering your area.