Research & editorial
Our editorial team researches UK building-moisture topics using government guidance, public-health sources and established building-science references. We write to help homeowners and tenants make informed decisions, and we flag where professional assessment is needed.
Credentials & limitations: Research-led editorial team. We are not chartered surveyors; our guides are general information, not a professional building survey.
Damp is a catch-all term for unwanted moisture in a building. The three main types in UK homes behave differently — and the right fix depends entirely on which one you have.
Updated 20 October 2026 · 3 min read
A side-by-side comparison of the three main types of damp, the signs of each, and a practical process for identifying which one you have.
Updated 18 October 2026 · 2 min read
A checklist of the visual and sensory signs of damp, and what each one tends to point towards.
Updated 15 October 2026 · 2 min read
Older solid-wall houses manage moisture differently from modern homes. Understanding how they are designed to breathe is key to avoiding well-meant but harmful 'fixes'.
Updated 12 October 2026 · 2 min read
Rising damp is groundwater moving up through the base of a wall. It is a genuine phenomenon, but far rarer than the number of diagnoses suggests.
Updated 18 October 2026 · 3 min read
How to recognise the classic signs of rising damp, and the alternative explanations to rule out before you accept the diagnosis.
Updated 22 September 2026 · 2 min read
A sceptical, practical guide to treating rising damp — starting with the cheap fixes most people actually need, and keeping chemical injection in proportion.
Updated 30 September 2026 · 3 min read
Rising damp and condensation are routinely confused, yet their cures are completely different. Here is how to tell which one you really have.
Updated 10 October 2026 · 2 min read
Penetrating damp is water that gets in from outside through a defect in the building fabric — and unlike condensation, it follows the weather.
Updated 14 October 2026 · 2 min read
The signs of penetrating damp — localised patches, weather-driven staining and damp that can strike at any height — and how to separate it from other causes.
Updated 25 September 2026 · 2 min read
From blocked gutters to worn pointing and leaking chimneys, here are the external defects that let penetrating damp into UK homes.
Updated 2 October 2026 · 3 min read
Treating penetrating damp is mostly about one thing — fixing the external defect that lets water in. Internal work comes afterwards, once the wall can dry.
Updated 6 October 2026 · 2 min read
Condensation is a simple physics problem with everyday causes. Understanding dew point, warm moist air and cold surfaces is the key to controlling it for good.
Updated 21 October 2026 · 4 min read
Window condensation is the most visible sign of too much moisture and cold glass. Here is why it happens and a practical, step-by-step way to stop it.
Updated 21 October 2026 · 3 min read
Stopping condensation is about tipping the balance between moisture, temperature and ventilation back in your favour. Here is the complete, practical method.
Updated 22 October 2026 · 3 min read
People often treat 'condensation' and 'damp' as opposites, but condensation is actually one type of damp. The distinction that matters is what is causing the moisture.
Updated 22 October 2026 · 2 min read
Keeping indoor humidity in a sensible range is the quiet secret to avoiding condensation and mould. Here is what 'ideal' means and how to measure and manage it.
Updated 22 October 2026 · 3 min read
Black mould is a sign that a surface has been damp for too long. Clearing it matters, but the lasting fix is always to find and stop the moisture feeding it.
Updated 27 October 2026 · 4 min read
Removing mould is straightforward if you work safely. But cleaning is only half the job — the mould will return unless you also fix the moisture feeding it.
Updated 27 October 2026 · 3 min read
Mould needs a damp surface to grow. Control moisture, ventilate well and keep surfaces warm enough, and you remove the conditions it depends on.
Updated 27 October 2026 · 3 min read
Bathrooms concentrate moisture in a small space, so they are prime territory for mould. Better ventilation and a few habits make a big difference.
Updated 27 October 2026 · 3 min read
Cold external walls, furniture pushed against them and the moisture we breathe out overnight make bedrooms a common home for mould. Small changes help a lot.
Updated 27 October 2026 · 3 min read
Damp and mould can affect health. Here is a careful, sourced summary of what UK public-health bodies say — and the important things they do not claim.
Updated 27 October 2026 · 4 min read
Damp proofing covers the barriers and measures that keep ground and external moisture out of a wall or floor. It only works when the right problem has been identified first.
Updated 20 October 2026 · 4 min read
A damp-proof course is a barrier near the base of a wall that stops groundwater rising. Here is how physical and chemical DPCs differ, and how they fail.
Updated 20 October 2026 · 3 min read
Chemical DPC injection is widely sold but often inappropriate. Here is a balanced view of when it genuinely helps and when it is the wrong fix.
Updated 21 October 2026 · 3 min read
Tanking is a waterproof lining applied to below-ground walls and floors. Here is how it works, how it compares to drained membranes, and its limits.
Updated 21 October 2026 · 3 min read
Damp proofing can last decades or fail within a few years, depending on the method and whether the real cause was fixed. Here is what to expect.
Updated 22 October 2026 · 3 min read
Indicative 2026 UK costs for damp proofing, from a chemical DPC to basement tanking. These are not quotations — get several written quotes before you commit.
Updated 22 October 2026 · 3 min read
What treating rising damp costs in 2026, broken down by stage. Figures are indicative only — and correct diagnosis comes before any spending.
Updated 23 October 2026 · 2 min read
What mould removal costs in 2026, from a few pounds of DIY cleaning to professional remediation. Figures are indicative — and removing mould without fixing the cause rarely lasts.
Updated 23 October 2026 · 2 min read
What a damp survey costs in 2026, and why an independent survey — one not tied to selling treatment — is usually money well spent. Figures are indicative only.
Updated 24 October 2026 · 2 min read
What a dehumidifier costs to run in 2026, by wattage and hours of use, with a calculator to estimate your own. Figures are indicative and depend on your electricity tariff.
Updated 24 October 2026 · 3 min read
Ventilation is the quiet workhorse of a healthy home. Understanding how fresh air moves through a house explains why it is central to controlling damp and mould.
Updated 23 October 2026 · 3 min read
The bathroom is the wettest room in most homes, and a good extractor fan is the front line against steam, condensation and mould. Here is how to choose and use one well.
Updated 23 October 2026 · 3 min read
Positive Input Ventilation is a popular whole-house approach to condensation. Here is a neutral look at how it works, where it shines and where it falls short.
Updated 24 October 2026 · 3 min read
Mould needs moisture, and poor ventilation lets moisture linger. Here is how airflow breaks that cycle — and the cases where ventilation alone will not solve the problem.
Updated 24 October 2026 · 3 min read
A dehumidifier can transform a condensation problem — but only if you pick the right type for your home. Here is what the specifications actually mean and how to choose.
Updated 24 October 2026 · 4 min read
A hygrometer tells you how damp your indoor air really is, so you can act before condensation becomes mould. Here is what to look for when choosing one.
Updated 24 October 2026 · 2 min read
A moisture meter can help you investigate damp — but only if you understand what it is really measuring. Here is the difference between pin and pinless, and how to read the results sensibly.
Updated 24 October 2026 · 3 min read
From sprays to anti-mould paints, there is a product for every stage of tackling mould. Here is what each type does, how to use it safely, and why the real fix is moisture control.
Updated 24 October 2026 · 3 min read
If you rent in England and your home has damp or mould, your landlord may have legal duties to put it right. Here is an overview of your rights and how to report a problem.
Updated 24 October 2026 · 3 min read
Scotland has its own housing rules, including the Repairing Standard. If you rent in Scotland and have damp or mould, here is an overview of your rights.
Updated 24 October 2026 · 2 min read
Wales reformed its renting law under the Renting Homes (Wales) Act. If you rent in Wales and have damp or mould, here is an overview of your rights.
Updated 24 October 2026 · 2 min read
Reporting damp the right way — in writing, with evidence — makes it far more likely your landlord will act, and protects you if the problem is ignored. Here is how.
Updated 24 October 2026 · 3 min read
