Damp is one of the most common issues in homes across Preston, but not all damp is the same. If you’re noticing black mould, wet patches or peeling paint, it’s essential to know whether you're dealing with condensation or penetrating damp — because each requires a different solution.
At Weather Wise Solutions Limited, we help homeowners and landlords across Preston get the right diagnosis with no-nonsense advice and tailored treatment plans.
What is Condensation?
Condensation forms when warm, moist air meets a cold surface — like a window or external wall. It’s especially common in winter and in poorly ventilated homes.
Key signs of condensation include:
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Water droplets on windows or walls
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Black mould (typically in corners, behind furniture or on ceilings)
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Peeling paint or wallpaper
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Musty smell, especially in bedrooms or bathrooms
Condensation is more of a humidity issue than a structural one — which means that with the right ventilation and lifestyle adjustments, it can usually be resolved without invasive building work.
What is Penetrating Damp?
Penetrating damp (also called lateral damp) is caused by water leaking through the building’s external envelope. That might be a cracked wall, damaged render, failed pointing, or defective guttering. It usually affects walls at higher levels (not just at the bottom like rising damp).
Typical signs include:
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Damp patches that get worse after rain
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Localised mould growth
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Discolouration or tide marks on walls
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Damage to plaster, especially on external-facing walls
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External signs like moss, algae or darkened bricks
Penetrating damp requires a physical repair — whether that’s repointing, applying a breathable coating, or fixing gutters and downpipes.
Why the Difference Matters
It’s common for homeowners to confuse condensation and penetrating damp — especially when mould appears. However, treating the wrong cause can waste time and money. For example:
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Adding ventilation won’t help if water is getting in through the wall
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Applying damp-proof paint may only mask condensation without solving the problem
That’s why we always recommend a professional assessment — including moisture mapping and a full external inspection.
Our Damp Diagnosis Process in Preston
When you book a free damp survey with Weather Wise Solutions, we:
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Inspect the interior and exterior of your home
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Use moisture meters and hygrometers to identify the type and location of damp
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Map the affected areas to identify patterns
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Check for ventilation levels, plumbing issues, and structural defects
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Provide an honest recommendation — with no pressure or upselling
Why Choose Weather Wise?
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Family-run and local to Preston
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Fully trained and CPD-certified in Dampness in Buildings
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Members of the Damp Proofing Association and the Federation of Damp
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Insurance-backed guarantees available for remedial work
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Friendly, expert advice from a team that treats your home like their own
Not Sure What’s Causing the Damp? Let Us Help.
We’ll help you get to the bottom of the problem, whether it’s condensation, penetrating damp, or something else entirely.