Know The Signs

Not all damp is the same - and treating the wrong type can make the problem worse. Understanding the signs of different types of damp helps identify the cause and choose the right solution.

Condensation

Condensation is caused by warm, moisture-laden air coming into contact with cold surfaces.

Common signs include:

Water droplets on windows, mirrors or tiles
Black mould in corners of rooms
Mould around window frames and reveals
Damp patches that appear and disappear
Musty smells, especially in winter

Often worse in:

Bathrooms, kitchens, bedrooms and poorly ventilated rooms.

Important to know:

Condensation is usually linked to ventilation, heating and cold spot risk - but can be a secondary symptom of an underlying damp issue.

Rising Damp

Rising damp occurs when moisture from the ground travels up through masonry.

Common signs include:

Damp or staining at the bottom of walls
"Tide marks" up to around one metre high
Crumbling or salt-contaminated plaster
Peeling paint or wallpaper near skirting boards
Skirting boards becoming soft or damaged

Usually affects:

Ground floor walls in older properties.

Important to know:

True rising damp is less common than often believed and is frequently misdiagnosed.

Penetrating Damp

Penetrating damp is caused by water entering the building from the outside.

Common signs include:

Localised damp patches on walls
Damp that worsens after rainfall
Peeling paint or blistering plaster
Mould on external-facing walls
Internal damp matching an external defect

Often linked to:

Cracked render, defective pointing, leaking gutters, roof issues or damaged brickwork.

Cold Spot Risk

Cold spots are areas of the building that remain colder than surrounding surfaces.

Common signs include:

Mould repeatedly returning to the same areas
Damp behind furniture or wardrobes
Mould at wall-ceiling junctions
Cold, clammy wall surfaces
Mould appearing despite regular cleaning

Often caused by:

Poor insulation, thermal bridging, blocked airflow or unheated spaces.

Important to know:

Cleaning mould does not resolve cold spot risk - the underlying cause must be addressed.

When to seek a damp survey

If you're unsure which type of damp you're dealing with, or if the problem keeps returning, a professional damp survey can help provide clarity.

A damp trace survey helps you:

Identify the type and cause of damp
Avoid incorrect work and repairs
Understand prevention-focused solutions
Protect your property long-term

Not sure what your seeing?

Contact damp trace for clear, honest, professional advice.