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Damp and Mould

Damp and mould are caused by excess moisture. Virtually all building materials contain moisture, even when ‘dry’ to the touch. 

What is damp?

"Damp is an excess of moisture that cannot escape from a structure, which over time can go on to cause considerable damage to the building and together with mould can cause or exacerbate health problems."
The three main types of damp:

Condensation damp

Moisture generated inside cools and condenses onto cooler parts of the building.

Rising damp

Water rising from the ground into the wall of a building.

Penetrating damp

Water travelling through walls, ceilings, or windows due to structural defects.

"Mould is a natural organic compound that develops in damp conditions and will only grow on damp surfaces or cold. It is often noticeable and present in situations where condensation damp is present."

What is mould?

What causes damp and mould?

Poor ventilation

which cannot remove excess moisture generated from normal occupant activities

Poor insulation

outside walls of properties not retaining heat

Fuel poverty or faulty heating systems

that lead to irregular heating

Leaks and structural defects

such as leaking pipes, blocked gutters, or roofs, faulty or old damp proof course, or flood damage

Condensation

which occurs where relative humidity is above 70%

Overcrowding of buildings

with high occupant density (people, pets and plants) in a room

Who is at risk?

People most at risk of health issues resulting from damp and mould include:

How do I prevent damp and mould?

Click below to find some low impact ways you can use to help to reduce damp and mould in your property.