Straight answers on damp, mould, timber & condensation
Twelve guides, written to explain rather than to sell. Every claim here is referenced to a British Standard, a published code of practice or named research — not to opinion. Most damp problems in Merseyside homes get diagnosed wrongly before they get diagnosed correctly, and understanding what the evidence actually shows is the fastest way to avoid paying for the wrong work.
Four situations, four places to begin
If you already know roughly what you are dealing with, these are the shortest routes to a useful answer.
There is a damp patch and I don't know what it is
Start with the differences between the three types and the evidence each one actually leaves behind.
Rising vs penetrating vs condensation →I've been told I need a damp-proof course
Before agreeing to anything, understand why rising damp is the most over-diagnosed condition in UK housing.
Damp misdiagnosis →The damp came back after treatment
Recurrence is usually a plastering failure rather than a damp-proofing one, and salts are almost always the reason.
What getting it wrong costs →I'm a landlord with a damp and mould report
Awaab's Law sets legal deadlines in the social sector, and the private rented sector is next.
Awaab's Law for landlords →All twelve guides
Running from diagnosis, through the structural causes people miss, to health, law and cost. Each stands on its own, and each is written to be checked against the standard it cites.
Rising vs Penetrating vs Condensation
Three completely different problems that get confused constantly — how to tell them apart, and why the diagnosis matters more than the treatment.
EvidenceDamp Misdiagnosis
Why rising damp is so often over-diagnosed in the UK, the real mechanism behind it, and how to protect yourself.
Our ProcessHow We Carry Out a Thorough Damp Survey
Step by step, what actually happens during a proper survey — the method we follow, and every tool we use and why.
StructureDamp in Chimneys & Roofs
Why chimney breasts and roofs cause damp that's rarely diagnosed correctly — flue condensation, hidden salts, and flashing failure.
StructureDamp in Floors & Subfloor Voids
Why a cold, musty ground floor is often blamed on rising damp when the real cause is a blocked airbrick.
StructureWhy the Wrong Render Can Cause Damp
Cement render on an old solid wall can trap moisture and cause the exact damp it was meant to prevent.
Below GroundBasements & Cellars
A plain-English guide to basement waterproofing types, what BS 8102 actually requires, and the questions worth asking.
SolutionsPIV Systems Explained
How positive input ventilation actually works, what it costs to run, and when it's the right fix for condensation.
HealthDamp, Mould & Your Health
What WHO and UK health bodies actually say about damp and mould's effects on health, and what genuinely reduces the risk.
EvidenceThe Real Cost of Getting Damp Wrong
What a wrong diagnosis actually costs — wasted treatment, repeat work, stalled house sales, and the wider cost to the NHS.
LegislationAwaab's Law: What Landlords Need to Know
Legal deadlines for investigating and fixing damp and mould in social housing — what's in force now, and what's coming in Phase 2.
EmergencyFlood Damage: Drying Out Your Home Safely
What to do after a flood or major leak, and why older buildings need a gentler drying approach than modern ones.
Questions people ask before reading further
They leave different evidence. Rising damp shows a tide mark at low level with salt contamination and cannot occur above about a metre; penetrating damp appears at any height and tracks a specific defect such as failed pointing, cracked render or a leaking gutter; condensation forms on cold surfaces, typically in corners, around windows and behind furniture. Our diagnosis guide sets out what each one actually leaves behind.
Because handheld moisture meters measure electrical resistance rather than water, and salts left in old plaster will drive a reading to the top of its scale on a wall containing no free water at all. BS 6576 itself describes a meter reading as qualitative rather than conclusive. Confirming a diagnosis needs a calcium carbide or gravimetric test.
With the guide to damp misdiagnosis. Recurrence after a damp-proof course is most often caused by hygroscopic salt contamination left in the original plaster, which draws moisture from the air regardless of whether the new course is working. It is a plastering failure rather than a damp-proofing one.
Both. They are written in plain English for homeowners, landlords and buyers, but every claim is referenced to a published standard, a code of practice or named research rather than to opinion, so a surveyor or solicitor can check the basis for anything stated.
Where to go next
If you would rather someone looked at it properly, a full damp survey and inspection starts at £249, with no VAT added, and comes with a written report. The seven-step method explains exactly what happens on the day, and each of our 22 town pages covers the ground conditions, housing stock and conservation constraints specific to that area.