Your Survey Says \"Penetrating Damp\" — here's what it actually means, and why it's usually cheaper to fix than you think
Worried about what your survey means?
Send me your survey and I'll read it personally. Within 24 hours you'll have a plain-English review of what it really means:
What's serious
What's normal for a house this age
What to do next
From a builder, not a surveyor. Nothing to sell you but the truth.
A plain-English explanation from a builder with 20+ years on houses like yours — not a surveyor, and with no repair work to sell you.
You've just had the survey back, and your stomach dropped
You found a house you liked enough to make an offer on.
The offer was accepted.
You paid — probably several hundred pounds — for a survey, expecting it to reassure you.
Instead, it came back with a wall of alarming language, a few red boxes, and the words "penetrating damp".
Maybe alongside "further investigation recommended" and a couple of other phrases that made the house you loved suddenly sound like a mistake.
Take a breath.
Before you start wondering whether to pull out, there are a few things worth understanding — because in most cases, this is far less serious than the report makes it feel.
Why surveys are written to sound worse than the house actually is
This is the part nobody explains to you.
A surveyor's job is to flag anything that could possibly be a concern, and to protect themselves from ever being blamed for missing something.
That's why survey reports read like a list of disasters even on perfectly ordinary homes.
They're written cautiously on purpose — not to tell you whether to buy, but to make sure the surveyor can never be held responsible later.
Almost every older home in the UK shows some damp on a survey.
A completely "clean" survey on a period or older property barely exists.
So seeing damp flagged doesn't mean you've found a bad house — it usually means you've found a normal one, described by someone whose job is to err on the side of alarm.
What "penetrating damp" actually is — in plain terms
Penetrating damp simply means water is getting into the wall from outside, rather than rising up from the ground (that's rising damp — a different thing, covered on its own page).
And here's the part the report often doesn't make clear: penetrating damp is usually caused by something external and fixable. The most common culprits are:
A blocked or leaking gutter, spilling water down the wall
A cracked or slipped roof tile letting rain in
A downpipe discharging against the wall instead of away from it
Failed pointing or render letting driving rain through
A leaking pipe behind the wall
Notice what most of those have in common: they're outside the house, and they're cheap to put right.
Clear the gutter, replace the tile, repoint the small area — and you've dealt with the cause.
The damp patch inside dries out once the water stops coming in.
That's the honest builder's view: a lot of penetrating damp is a guttering problem wearing a scary name.
So why do the costs you've seen online look so frightening?
Because the figures floating around — £2,000, £5,000, £8,000 and up — are for the worst version:
structural repairs
large areas of render
roof work
full replastering
Those cases are real, but they're the minority.
There's also an industry built around damp.
Be cautious of "free damp surveys" — these usually come from companies that make their money doing the damp work, so they have every reason to find an expensive problem.
A free survey from someone who profits from the cure is not an impartial opinion.
The trouble is, from where you're sitting, you can't tell which version your house is. Is it the £200 gutter fix, or the £8,000 structural job?
That's the question that actually matters — and it's the one thing a webpage genuinely can't answer for you, because it depends entirely on what's going on at your specific property.
The 3 things you actually need to know right now
Your survey almost certainly hasn't told you these clearly:
1 - Is this actually a problem? Or is it normal for a house of this age, flagged out of caution?
2 - How urgent is it? Does it need doing now, or is it something you sort out over time?
3 - What will it realistically cost? Not the worst-case scare figure — the honest, likely number.
Here's the frustrating bit: the people around you can't fill these gaps.
Your surveyor won't commit to a straight answer — saying "it's fine" exposes them to liability, so they hedge.
Your conveyancer can't help — building condition isn't their area; they handle the legal side.
A builder quoting for the work isn't impartial — they want the job, so the problem rarely shrinks in their telling.
You're left with a frightening report and no one whose only interest is telling you the truth.
Not sure whether your damp is the cheap kind or the costly kind?
That's exactly what I'll tell you.
I'm Fran Mickelborough, a builder with over 20 years on houses exactly like the one you're buying.
I'm not a surveyor, and I have no repair work to sell you — so I've no reason to make your damp sound better or worse than it is.
Send me your survey and I'll read it personally.
Within 24 hours you'll have a plain-English review of what its findings really mean for your house:
Which items are genuine problems and which are normal for the age
How urgent each one is
What the routine repairs are realistically likely to cost
Within 24 hours. From a builder, not a surveyor. Just the truth.
You've already spent hundreds on the survey, with tens of thousands riding on the decision. This is £29.
A quick honest note about damp specifically
Most of the time, a survey review tells you everything you need.
But damp is occasionally one of those things I genuinely can't call from the document alone — whether yours is the cheap external fix or the rarer serious kind sometimes depends on seeing it.
If that's the case with yours, I'll tell you honestly, and there's the option of a quick video walkthrough where I look at it with you.
But the review is the place to start — and for most surveys, it's all you'll need.
What other buyers have said
"I was ready to pull out. Fran read the survey, explained the damp was almost certainly the guttering, and talked me through the whole thing calmly. We went ahead — and got money off anyway." — Liam M, Lincoln
"The survey terrified us. Twenty minutes understanding it properly, and I knew exactly what we were dealing with. Best money we spent in the whole process." — Sharif P, Barnsley
Most of the time, the house you fell in love with is fine
You just need someone honest to tell you so — someone who's seen this a hundred times, has nothing to sell you, and will give it to you straight.
Plain English · within 24 hours · just the truth
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Related issues buyers also search for
You may also find these helpful if your survey has raised other concerns:
Worried about what your survey means?
Send me your survey and I'll read it personally.
Within 24 hours you'll have a plain-English review of what it really means —
What's serious
What's normal for a house this age
What to do next
From a builder, not a surveyor. Nothing to sell you but the truth.
A practical builder's interpretation of your survey.
Not a formal survey, structural engineer's report, or contractor quotation
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