Technical Articles

What are the two types of damp?


Damp is a common problem that many homeowners face. It not only affects the aesthetics of a building but can also lead to serious health issues if left untreated. Understanding the different types of damp is essential in order to effectively tackle the problem. In this article, we will explore the two main types of damp and provide insights into their causes, signs, and treatment methods.

Rising damp

Rising damp is caused by groundwater rising through the capillaries in brickwork or masonry, leading to moisture penetration on walls or floors. This occurs when the building lacks an effective damp-proof course (DPC) or has a deteriorated one. Common signs of rising damp include discolored patches on walls, peeling paint or wallpaper, and a musty odor. To treat rising damp, it is crucial to repair or install a DPC and ensure that any damaged or porous materials are replaced. Additionally, proper ventilation plays a key role in preventing the recurrence of rising damp.

Condensation damp

Condensation damp occurs when warm air collides with cold surfaces, causing water vapor to turn into liquid. This type of damp is prevalent in areas with high humidity levels, inadequate ventilation, or poor insulation. Signs of condensation damp include water droplets on windows, mold growth, and a damp smell. To address condensation damp, it is important to improve ventilation by using extractor fans, opening windows, or installing mechanical ventilation systems. Proper insulation and the use of dehumidifiers can also help reduce condensation.


Damp problems can be a major headache for homeowners, but understanding the two main types of damp is the first step towards finding an effective solution. Whether dealing with rising damp or condensation damp, prompt action is crucial to prevent further damage and ensure a healthy living environment. By addressing the underlying causes and implementing appropriate treatment methods, homeowners can successfully combat damp and create a dry, comfortable home.



Contact: Eason Wang

Phone: +86-13751010017


Add: 1F Junfeng Building, Gongle, Xixiang, Baoan District, Shenzhen, Guangdong, China

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