When measuring moisture levels in internal walls, several factors can affect the readings. The readings can vary depending on the type of wall, the materials used in its construction, and the environmental conditions. However, there are some general guidelines that can be used to assess the moisture content of internal walls.
In general, moisture readings for internal walls should be below 15%. Readings between 15% and 20% indicate a slightly elevated moisture level, but it may not be a cause for concern. Readings above 20% indicate a high moisture level, which can potentially lead to damage to the wall. If the moisture content of an internal wall is too high, it may result in the growth of mold or mildew, peeling paint, and damage to the wall's structure.