Understanding Moisture Sources for Internal Walls

Moisture in internal walls can originate from various sources, compromising the structural integrity and indoor air quality of a building. Understanding these sources is the first step towards effective moisture management.

• **Condensation:** Occurs when warm, humid air meets a cold surface, releasing moisture onto the wall.
• **Plumbing Leaks:** Leaking pipes, appliances, or fixtures can seep water into the walls.
• **Roof Leaks:** Water damage from a leaky roof can penetrate through the ceiling and walls.
• **Rising Damp:** Moisture from the ground or foundations can migrate upwards into the walls by capillary action.
• **Penetrating Damp:** External water, such as heavy rainfall or flooding, can penetrate through cracks or gaps in the exterior walls.

What should moisture readings be for internal walls?

Moisture content readings provide an indication of the moisture levels within internal walls. Acceptable moisture levels vary depending on the type of wall construction, local climate, and other factors. Generally, moisture readings should be within the following ranges:

Moisture readings above these ranges may indicate excessive moisture, which requires investigation and remediation measures to prevent damage and health risks.