Identify the Source. Fix the Cause. Restore the Wall Properly.
Penetrating Damp Treatment in York
Penetrating damp is one of the most common — and most misunderstood — damp problems we see in York properties. Unlike rising damp, penetrating damp enters a building horizontally, usually through external defects that allow rainwater to pass through the structure.
At Damps, we focus on locating exactly where moisture is getting in and applying the correct repair, rather than masking the symptoms. Once the cause is fixed, we carry out full internal repairs to leave walls dry, sound, and ready for decoration.
What Penetrating Damp Looks Like in York Homes
York has a large stock of solid brick properties, many of which are exposed to prevailing wind and rainfall. Over time, external defects can allow moisture to soak through walls, particularly during prolonged wet weather.
Common signs of penetrating damp include:
Penetrating damp is especially common in end terraces, properties with aged brickwork, or homes where modern alterations have affected breathability.
One of the biggest issues we encounter is misdiagnosis.
Common Causes of Penetrating Damp (and Misdiagnosis)
Penetrating damp is frequently confused with condensation or rising damp — which often leads to ineffective treatment.
Typical causes we identify in York include:
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Cracked or deteriorated brickwork
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Failing pointing or mortar joints
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Blocked or leaking gutters and downpipes
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Defective render or coatings
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Poorly sealed windows, doors, or roof junctions
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Bridged cavities or wall ties
Importantly, injecting a damp-proof course will not fix penetrating damp. If the external source of moisture isn’t addressed, the problem will persist — regardless of internal treatments.
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How We Diagnose Penetrating Damp Properly
Accurate diagnosis is essential. We never rely on assumptions or single meter readings.
Our assessment process includes:
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Visual inspection of internal damp patterns
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External inspection of brickwork, pointing, and rainwater goods
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Moisture profiling across affected walls
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Identification of water ingress points
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Assessment of exposure to wind-driven rain
By understanding how water is entering the building, we can target the true cause, not just the visible damage.
Treatment depends entirely on the source of moisture. Once identified, we apply the most effective solution for the property.
Correct Penetrating Damp Treatment Options
External Repairs
Where defects are present, repairs may include:
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Brickwork repairs or repointing
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Gutter or downpipe replacement
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Repair or removal of defective render
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Sealing around windows, doors, and roof details
Stopping moisture externally is always the priority.
Internal Damp Protection
Where walls have been affected internally, additional protection may be required:
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Damp-resistant membrane systems
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Localised tanking in severe areas
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Breathable coatings where appropriate
Breathable Plaster Systems
Using the correct plaster system is essential:
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Lime-based plasters (such as Limelite) are often recommended for older York homes
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Sand and cement systems are only used where appropriate and safe
We’ll explain which system is suitable — and why.
Repair and Reinstatement Works
Once the cause of penetrating damp has been resolved, internal repairs can begin.
Our reinstatement work typically includes:
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Removal of damaged or salt-contaminated plaster
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Application of the chosen plaster system
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Repair or replacement of skirting boards
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Clean, smooth finish ready for redecorating
Because we manage both diagnosis and repairs, the work is carried out efficiently with no delays between trades.
Recent Penetrating Damp Work in York
We regularly resolve penetrating damp issues across York and surrounding areas, including properties affected by long-term water ingress.
Recent projects include:
External defect repairs followed by internal wall restoration
Penetrating damp treatment to solid brick end-terrace walls
Damp membrane installation with full plaster renovation
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- Damp Proofing
What to expect
Book a Penetrating Damp Survey in York
If you’re dealing with persistent damp patches or moisture after rainfall, a proper inspection is the only way to fix the problem long-term.
We provide honest assessments and practical solutions — not unnecessary treatments.
01
Consultation
Free initial advice & booking
02
Survey
Detailed inspection & report
03
Treatment
Tailored damp proofing solutions
04
Aftercare
Ongoing support & peace of mind
We deal with rising damp, penetrating damp, condensation issues, and basement waterproofing. Our team finds the root cause and applies the right solution for lasting results.
Yes — we offer free, no‑obligation surveys. One of our specialists will assess your property and explain the best treatment options.
Our damp‑proofing systems are backed by long‑term guarantees. Once treated properly, you won’t need to worry about the issue returning.
Absolutely. We work on residential properties, commercial buildings, and rental homes. No job is too small or too large.
We aim to respond to enquiries the same day and can often arrange a survey within 24–48 hours. Emergency call‑outs are available.
We keep disruption to a minimum. Our team protects your property, carries out the work cleanly, and tidies up after completion