- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 20 Sep 2018
Moisture in buildings
Moisture is the presence of water, often in small or even trace amounts. Moisture can be found in water vapour, condensation, and in or on the fabric of a building and can cause damp resulting in problems such as staining, mould growth, mildew and poor indoor air quality, and so on.
The common sources of moisture in buildings include:
- Penetrating damp.
- Leakage from pipes, tanks, drains, and so on.
- Rising damp.
- Building defect, e.g. lack of adequate roof space ventilation, faulty retrofit installation, application of paint or plaster that affects the breathability of the building element, and so on.
- Indoor moisture sources, e.g. cooking, bathing, washing, hot tubs, indoor swimming pools, and so on..
- Natural or mechanical ventilation.
- Use of de-humidifiers or air conditioning units.
- Insulation of cold surfaces, such as pipes.
- Increasing air temperature.
- Removing sources of moisture such as drying clothes and ensuring vented tumble dryers are appropriately vented to the outside.
- Mending leaking pipes, wastes and overflows.
- Eliminating rising damp and penetrating damp.
- Introducing moisture barriers such as vapour barriers, damp proof membranes, and so on.
 Related articles on Designing Buildings Wiki
Featured articles and news
From alabaster to travertine – how many types do you know?
Well-designed lighting helps maintain a healthy physiological and psychological balance.
Transferring the risk for obtaining the target BREEAM rating.
A simple but effective way to determine the root cause of an issue.
BSRIA report suggest the European market will double to 415 million Euros by 2023.
Why a wellbeing strategy is vital for property managers.
An ECA briefing for members about the commercial implications of leaving the EU.
A crucial moment on any project - and fraught with danger.
The performance gap from a Northern Ireland perspective.
Book review: Buildings of protestant nonconformity.
Design and testing for health and wellbeing - free download from BRE.